The Linux Intranet Server HOWTO Pramod Karnad, karnad@indiamail.com v2.11, 7 August 1997 This document describes how to setup an Intranet using Linux as the server which binds Unix, Netware, NT and Windows together. Hence by just establishing the connection to the Linux box you are provided transparent access to all the various platforms. Detailed explanations are provided for setting up HTTP using the NCSA server and connect to it using TCP/IP clients from Novell, Microsoft under Windows3.1, WFWG,Win95 and WinNT and MacTCP on the Apple PowerMac. 1. Introduction In simple terms, the Intranet is the descriptive term being used for the implementation of Internet technologies within a corporate organisation, rather than for external connection to the global Internet. This implementation is performed in such a way as to transparently deliver the immense informational resources of an organisation to each individuals desktop with minimal cost, time and effort. This document attempts to explain in simple terms how to setup an Intranet using tools which are readily available and are generally costing little or are free. This document assumes that you already know how to install TCP/IP on your Linux server and connect it physically to your LAN using an Ethernet network card. This also assumes you have some basic knowledge of Netware, WinNT and Mac systems. The configuration of the Netware server has been shown using version 3.1x as the basis. You can also use INETCFG to achieve the same result. On the client side the discussion is with respect to Windows 3.1x, Windows for Workgroups and Win95, WinNT and the Apple PowerMac. I am using the private network addresses (RFC-1918) of 172.16.0.0 and 172.17.0.0 only as examples. You may choose suitable addresses depending on your configuration. Linux Netware WFWG/WinNT Server Server Server 172.16.0.1 172.16.0.2 172.16.0.3 | | | 172.16.0.0 ------+-----+-----+--------+--+-------------- | | 172.16.0.254 W/S 1 Router 172.16.0.5 | 172.17.0.254 | ----------+-------+-------- 172.17.0.0 | W/S 2 172.17.0.5 1.1. What is required You will need the following software before attempting the installation. · the HTTP server software which can be downloaded from OneStep NCSA HTTPd Downloader at http://hoohoo.ncsa.uiuc.edu/docs/setup/OneStep.html page. · The Novell Netware Client available from HTTP://support.novell.com/ (The TCP/IP files are included with the client). · The Microsoft TCP/IP client available from HTTP://www.microsoft.com/ · The Apple MacTCP client available from HTTP://www.apple.com/ · WWW Browsers like Netscape at HTTP://home.netscape.com/ or MS Internet Explorer at HTTP://www.microsoft.com/ or NCSA Mosaic from http://www.ncsa.uiuc.edu/SDG/Software/Mosaic/NCSAMosaicHome.html 1.2. New versions of this document New versions of the Linux Intranet Server HOWTO will be periodically posted to comp.os.linux.announce and comp.os.linux.help. They will also be uploaded to various Linux FTP sites, including sunsite.unc.edu. The Latest version of this document is available in HTML format at http://www.inet.co.th/cyberclub/karnadp/http.html 1.3. Feedback If you have questions or comments about this document, please feel free to mail Pramod Karnad, at karnad@indiamail.com. Suggestions, criticism and mail are always welcome. If you find a mistake with this document, please let me know so I can correct it in the next version. Thanx. 2. Install the HTTP server When you download the server you have two options: To get the source and compile it yourself, or get the precompiled binaries. The precompiled binaries for Linux (ELF) version are available at NCSA but not the older versions. 2.1. Preparation before downloading The server at NCSA will guide you through the steps for configuration options and prepare the various files for you. But before you attempt to download HTTPd be prepared with answers to the following questions 2.1.1. The Operating System First, you must choose whether to download the source or a pre- compiled version of the software. If your particular system doesn't appear in the menu, then you will have to get the default source, and compile it yourself. To check the version of your Linux go to the command prompt on your Linux machine and type linux:~$ uname -a which will respond with a line which looks similar to this linux:~$ uname -a Linux linux 2.0.29 #4 Tue Sep 13 04:05:51 CDT 1994 i586 linux:~$ The version of Linux is 2.0.29. The remaining parameters can be specified before downloading or configured later by modifying the file srm.conf in the /usr/local/etc/httpd/conf directory. The names of the actual directives that appear in the file httpd.conf are shown in brackets. The only exception is the directive DocumentRoot which appears in the file srm.conf 2.1.2. Process type (ServerType) This specifies how your machine will run your HTTPd server. The preferred method is 'standalone'. This makes the HTTP daemon to be running constantly. If you choose to load HTTPd under 'inetd', the server binary will be reloaded into memory for every request, which may slow your server down. 2.1.3. Binding Port (Port) This specifies which port of your machine that the HTTPd daemon will bind to and listen for HTTP requests. If you can login as 'root', use the default setting of 80. Otherwise choose a setting between 1025 and 65535. 2.1.4. Server user identity (User) This is the user id the server will change to when answering requests and acting on files.This question needs to be answered only if you are running the server as 'standalone'. If you are someone without root permissions, just use your own login name. If you are system administrator, you might want to create a special user so you can control file permissions. 2.1.5. Server group identity (Group) This is the group id the server will change to when answering requests and acting on files. This is similar to Server User identity and is applicable only if you are running the server as standalone. If you do not have root permissions, just use the name of your primary group. You can find out your group by typing groups at the Linux command prompt. 2.1.6. Server administrator email address (ServerAdmin) This is the email address that the user should send an email message to when reporting a problem with the server. You can put your personal e-mail address. 2.1.7. Location of server directory (ServerRoot) This is where the server resides on your system. If you have root permissions leave it in its recommended location /usr/local/etc/httpd. If you cannot login as root, choose a subdirectory in your home path. You can find out the path of your home directory with the pwd command. 2.1.8. Location of HTML files (DocumentRoot) This is where the HTML files to be served are located. The default location is /usr/local/etc/httpd/htdocs. You could however set it to be the home directory of the special user you chose in Server user identity, or a subdirectory in your home directory if you can't login as root. When in doubt, use the default settings. Now that you have answers to the above questions you can Download NCSA HTTPd at http://hoohoo.ncsa.uiuc.edu/docs/setup/OneStep.html. You should read the HTTPd Documentation at http://hoohoo.ncsa.uiuc.edu/docs/ before you attempt installation. If you are planning to compile the code then you need to modify the makefiles in each of the th ree directories support, src, cgi-src. If your version of Linux is already supported then you just have to type make linux at the top level directory (i.e. /usr/local/etc/httpd) 2.2. Compiling HTTPd Compiling is simple, just type make linux at the prompt in the server root directory. Note: Users of pre-ELF Linux have to uncomment #define NO_PASS in file portability.h and set DBM_LIBS= -ldbm in the Makefile before compiling HTTPd. 3. Testing HTTPd After you have installed HTTPd, login as root and start it by typing httpd & . (assuming you have installed as standalone) You should now be able to see it in the list generated by ps. The simplest way to test HTTPd is by Telnet. At the Linux command prompt type linux:~$ telnet 172.16.0.1 80 where 80 is the default port for HTTP. If you have configured 'Port' as something different then type that number instead. You should get a response which looks like this Trying 172.16.0.1... Connected to linux.mydomain. Escape character is '^]'. Now if you type in any character and press Enter you should get a response similar to the one shown below. HTTP/1.0 400 Bad Request Date: Wed, 10 Jan 1996 10:24:37 GMT Server: NCSA/1.5 Content-type: text/html 400 Bad Request < /TITLE> < /HEAD> <BODY><H1>400 Bad Request < /H1> Your client sent a query that this server could not understand.<P> Reason: Invalid or unsupported method.<P> < /BODY> Now we are ready to connect to this server using another PC and a WWW Browser. 4. Connecting to the Linux Server Please refer to the diagram shown in the chapter ``Introduction'' for the addressing scheme used. Workstation 1 (W/S1) is on network 172.16.0.0 and can access the Linux server directly whereas Workstation 2 (W/S2) is on network 172.17.0.0 and needs to use the gateway (router) 172.17.0.254 to access the Linux box. This gateway information needs to be provided while configuring the clients only on W/S2. Netware refers to the gateway as 'ip_router'. I am using W/S2 to illustrate the client setup. To setup W/S1 just change the address 172.17.0.5 to 172.16.0.5 and ignore all references to the gateway/router. If you do not have a router you can skip the next section and proceed to · ``Setup Netware Server'' if you use a Netware server. · ``Setup MS Windows Client'' if you use the Microsoft Client. 4.1. Setup the Linux server You may skip this section if you do not have a router. You have to configure the Linux server to recognise the router thus allowing Workstation 2 to connect to the Web server. In order to setup the Linux server you should login as root. At the server prompt type route add gw default 172.16.0.254 To use this gateway everytime you boot the Linux server edit the file /etc/rc.d/rc.inet1 and change the line containing the gateway defini­ tion to GATEWAY = "172.16.0.254". Make sure the line for adding the gateway is not commented out. ALT: You can add routes to the networks on the other side of the router. This would be done as route add -net 172.17.0.0 gw 172.16.0.254 To add this route everytime you boot Linux add the command to your /etc/rc.d/rc.local file. 4.2. Setup the Netware server In order to setup the Netware server you should have Supervisor permissions or atleast Console operator permissions. If these cannot be got, try asking your Network Administrator to help you with the setup. At the Server enable the Ethernet_II frame type on the LAN by typing these commands or include them in the AUTOEXEC.ncf file. load NE2000 frame=Ethernet_II name=IPNET load TCPIP bind IP to IPNET addr=172.16.0.2 mask=FF.FF.FF.0 You might have to specify the slot or board number while loading the NE2000 driver depending on your machine configuration. (eg: load NE2000 slot=3 frame=.....) 4.3. Setup the Netware Client On the PC you have the choice of Win3.1,WFWG or Win95. The installation procedure differs between Win95 and the older windows if you are using the 32bit client from Microsoft or Novell. If you are going to use the 16bit client, the procedure is the same and you can refer to the Windows 3.x installation instructions. For installing the 32bit client for Win95 skip to ``Windows 95 installation''. 4.3.1. Windows 3.x If you are using Win3.1 or WFWG you can install the Netware Client (VLMs) and some additional files which are provided with the TCP/IP diskette, namely TCPIP.exe, VTCPIP.386, WINSOCK.dll and WLIBSOCK.dll Note that the WINSOCK.dll file is different from the ones provided with Win95 and Trumpet. Install the Netware Client with the support for windows. Copy VTCPIP.386, WINSOCK.dll and WLIBSOCK.dll to the SYSTEM directory and TCPIP.exe to the NWCLIENT directory. Now modify the STARTNET.bat in the NWCLIENT directory to lsl ne2000 ---> your network card driver c:\windows\odihlp.exe ---->if you are using WFWG ipxodi tcpip ---> add this line nwip ---> if you use Netware/IP vlm Create a subdirectory (say) \NET\TCP and copy the files HOSTS, NETWORKS, PROTOCOLS and SERVICES from /etc on your Linux server or the directory SYS:ETC on your Netware server. Edit the copied HOSTS file to add the line for your new Linux server. This will enable you to refer to the Linux server as http://linux.mydomain/ instead of http://172.16.0.1/in your WWW browser 127.0.0.1 localhost 172.16.0.1 linux.mydomain Edit the NET.cfg file in NWCLIENT directory Link Driver NE2000 port 300 int 3 MEM D0000 FRAME Ethernet_802.2 ; ---- add these lines ---- FRAME Ethernet_II Protocol TCPIP PATH TCP_CFG C:\NET\TCP ip_address 172.17.0.5 ip_netmask 255.255.255.0 ip_router 172.17.0.254 ---> add the address of your gateway only ---> if you have to use this ---> gateway to reach your HTTP server Link Support MemPool 6192 ---> the minimum is 1024. Try with different values Buffers 10 1580 ---> this again can be fine tuned ;--------------------------------- ; You may need to add lines like these if you are using Netware/IP ; NWIP NWIP_DOMAIN_NAME mydomain NSQ_BROADCAST ON NWIP1_1 COMPATIBILITY OFF AUTORETRIES 1 AUTORETRY SECS 10 Edit the SYSTEM.ini file in the WINDOWS directory and add this entry for VTCPIP.386 [386Enh] ..... network=*vnetbios, vipx.386, vnetware.386, VTCPIP.386 ..... Reboot your PC, run STARTNET.bat and you can now use your favorite WWW browser to access your Web pages. You need not login to Netware and you don't have to run TCPMAN (if you use Trumpet Winsock). 4.3.2. Windows 95 This section explains how to install the 32bit client on Win95. Firstly you must install the following Client for Netware Networks (from Microsoft or Novell) Microsoft TCP/IP Protocol Network Adapter To install these items, click on My Computer, Control Panel, Networks. Click Add. You will now be in a window that displays Client, Adapter, Protocol and Service. To install the Client for Netware Networks: 1. DoubleClick on Client 2. Click on Microsoft or Novell 3. DoubleClick on Client for Netware Networks To install the TCP/IP Protocol: 1. DoubleClick on Protocol 2. Click on Microsoft 3. DoubleClick on TCP/IP Windows 95 by default installs several other protocols automatically. Remove them by clicking on them and clicking the Remove button. Typically Win95 installs the Microsoft NetBeui protocol, and IPX/SPX compatible protocol. You can delete the NetBEUI protocol, but you will need the IPX/SPX protocol if you wish to login to the Netware Server. To setup TCP/IP click on TCP/IP, click on Properties, click on the tab IP address Enter your IP address in the 'Specify an IP address ' box as 172.17.0.5 In the Subnet Mask box enter 255.255.255.0 select the tab Gateway Enter your gateway (router) address in the box New gateway as 172.17.0.254 Click the Add button The gateway address should now appear under the installed gateways box. Now Click OK. You should get a message to reboot. Do so. You should now be able to use the Browser to connect to your HTTP Server. 4.4. Setup Microsoft Client If you are using the Microsoft Client for accessing your network, then this section details how to install TCP/IP for · ``Windows for Workgroups (WFWG)'' · ``Windows 95'' · ``Windows NT 4.0'' Note: To enable you to refer to the Linux server as http://linux.mydomain/ instead of http://172.16.0.1/ in the WWW browser and all your intranet commands you need to edit the hosts file. You can add more entries for each of your other hosts (Netware, Unix, WinNT) as well. The Windows family keeps its HOSTS file in \WINDOWS or in \WINDOWS\SYSTEM depending on the version. Edit this file and add a line for your Linux server as: 127.0.0.1 localhost 172.16.0.1 linux.mydomain 172.16.0.2 netware.mydomain 172.16.0.3 winNT.mydomain 172.16.0.5 ws_1 4.4.1. Windows for Workgroups This section explains how to install the 32bit client on WFWG. Firstly you must download the TCP/IP drivers for Windows from Microsoft. The current version is 3.11b and is available at ftp://ftp.microsoft.com or other sites as tcp32b.exe. Make sure that you have load Win32s before trying to load the TCP/IP-32bit driver. Having expanded the TCP/IP files into a temporary directory (say C:\TEMP), check your \WINDOWS\SYSTEM directory for copies of OEMSETUP.INF. If there are any, rename them. Now copy the OEMSETUP.INF file from the TEMP directory to the \WINDOWS\SYSTEM directory. If you have loaded any other TCP/IP stacks on your system, please remove them before you proceed. Start Network Setup or Windows Setup/Change Network settings Click the Networks button Click Install Microsoft Windows Network. Choose support for additional networks (if required) Click OK You should be prompted for your network adapter - select the appropri­ ate one. If you are not prompted, then Click the Adapter button select an adapter (say NE2000) Click OK Click the Protocol button select the MS TCP/IP-32 protocol click OK You will now be prompted to configure the TCP/IP protocol stack. You can always reconfigure this by highlighting the TCP/IP protocol shown in the box Adapters and clicking the Setup button. In the IP address box enter 172.17.0.5 In the Subnet Mask box enter 255.255.255.0 Enter your gateway (router) address in the box default gateway as 172.17.0.254 Click OK. The computer will ask you to restart. Do so. You should now be able to use the Browser to connect to your HTTP Server. 4.4.2. Windows 95 This section explains how to install the 32bit client for Microsoft on Win95. Firstly you must install the following Client for Microsoft Networks Microsoft TCP/IP Protocol Network Adapter To install these items, click on My Computer, Control Panel, Networks. Click Add. You will now be in a window that displays Client, Adapter, Protocol and Service. To install the Client for Microsoft Networks: 1. DoubleClick on Client 2. Click on Microsoft 3. DoubleClick on Client for Microsoft Networks To install the TCP/IP Protocol: 1. DoubleClick on Protocol 2. Click on Microsoft 3. DoubleClick on TCP/IP Windows 95 by default installs several protocols automatically. Remove them by clicking on them and clicking the Remove button. Typically Win95 installs the Microsoft NetBeui protocol. To setup TCP/IP click on TCP/IP, click on Properties, click on the tab IP address Enter your IP address in the 'Specify an IP address ' box as 172.17.0.5 In the Subnet Mask box enter 255.255.255.0 select the tab Gateway Enter your gateway (router) address in the box New gateway as 172.17.0.254 Click the Add button The gateway address should now appear under the installed gateways box. Now Click OK. You should get a message to reboot. Do so. You should now be able to use the Browser to connect to your HTTP Server. 4.4.3. Windows NT This section details how to Install the TCP/IP client for WinNT 4.0. Start Control Panel/ Network Select the Adapter tab. Click Add to add a new adapter (if you don't have one) You should be prompted for your network adapter - select the appropri­ ate one. To add the protocols. Select the Protocols tab Click Add Select the TCP/IP protocol Click OK You will now be prompted to configure the TCP/IP protocol stack. You can always reconfigure this by highlighting the TCP/IP protocol and clicking the Properties button. Select the tab IP Address Mark the checkbox 'Specify an IP address' In the IP address box enter 172.17.0.5 In the Subnet Mask box enter 255.255.255.0 Enter your gateway (router) address in the box Default Gateway as 172.17.0.254 Click OK. The computer will ask you to restart. You can now use any Browser to connect to your HTTP Server. 4.5. Setup TCP/IP on Macintosh If you are using the Macintosh for accessing your network, then this section details how to install MacTCP for the PowerMacs. Note: To enable you to refer to the Linux server as http://linux.mydomain/ instead of http://172.16.0.1/ in the WWW browser and all your intranet commands you need to edit the hosts file. The format of the hosts file is different from the one used in Unix. The Mac hosts file is based on RFC-1035. You can add more entries for each of your other hosts (Netware, Unix, WinNT) as well. The MacOS keeps its HOSTS file in the Preferences folder under the System folder. Edit this file and add a line for your Linux server as: linux.mydomain A 172.16.0.1 netware.mydomain A 172.16.0.2 winNT.mydomain A 172.16.0.3 ws_1 A 172.16.0.5 4.5.1. MacTCP This section explains how to install MacTCP. Firstly you must download the MacTCP files from Apple or install it from the Internet Connection CD. To configure MacTCP, click the Apple Menu/ Control Panels/ TCP/IP. In the screen change the setting for 'Connect via:' to 'Ethernet' Change the 'Configure' setting to 'Manually' In the IP address box enter 172.17.0.5 In the Subnet Mask box enter 255.255.255.0 Enter your gateway (router) address in the box Router address as 172.17.0.254 Click OK. You should now be able to use the Browser to connect to your HTTP Server. 5. Setting up the Intranet An Intranet cannot be complete without sharing the resources on the different platforms. You will need support for other filesystems, so that you can access the data available on them. This document provides instructions to connect Linux to the following popular filesystems. · ``NCP filesystem for Netware'' · ``SMB filesystem for Windows'' · ``NFS filesystem for Unix'' These filesystems can be compiled into the Linux kernel or added as modules, depending on the version of Linux. If you are not familiar with compiling the kernel you can refer to the Kernel HOWTO http://sunsite.unc.edu/mdw/HOWTO/Kernel-HOWTO.html and the Module HOWTO http://sunsite.unc.edu/mdw/HOWTO/Module-HOWTO.html for compiling the kernel with modules. 5.1. NCPFS To share the files on the Netware server you will need support for NCP (ncpfs). NCPFS works with kernel version 1.2.x and 1.3.71 upwards. It does not work with any earlier 1.3.x kernel. It cannot access the NDS database in Netware 4.x, but can make use of the bindery. If you are using Netware 4.x you can enable bindery support for specific containers using the command Set Bindery Context at the console as: set Bindery Context = CORP.MYDOM;WEBUSER.MYDOM In the above example two containers have bindery support enabled. You will need to download the NCP filesystem utilities using the URL ftp://sunsite.unc.edu/pub/Linux/system/filesystems/ncpfs/ncpfs.tgz (currently ncpfs-2.0.10) from Sunsite. 5.1.1. Installation To install the ncpfs utilities, type zcat ncpfs.tgz | tar xvf - to expand the files into its own directory. In this case you will get a directory ncpfs-2.0.10 Change your directory to this ncpfs directory before proceeding with the installation. Read the README and edit the Makefile if necessary. The installation of ncpfs depends on the kernel version you are using. For kernel 1.2, you should simply type 'make'. Subsequently typing 'make install' will install the executables and man pages. If you use Kernel 1.3.71 or later, you might have to recompile your kernel. With these kernels, the kernel part of ncpfs is already included in the main source tree. To check if the kernel needs to be recompiled type cat /proc/filesystems It should show you a line saying that the kernel knows ncpfs. If ncpfs is not there, you can either recompile the kernel or add ncpfs as a module. For recompiling the kernel you should type 'make config' and when it asks you for The IPX protocol (CONFIG_IPX) [N/y/?] simply answer 'y'. Probably you do not need the full internal net that you are asked for next. Once the kernel is successfully installed, reboot, check /proc/filesystems and if everything is OK proceed with the installation of the ncpfs utilities. Change directory to the location holding your downloaded ncpfs files, and type 'make'. After the compilation is finished type 'make install' to install the various utilities and man pages. 5.1.2. Mounting NCPFS To check the installation type ipx_configure --auto_interface=on --auto_primary=on slist You should be able to see a list of your Netware servers. Now we are ready to share files from the Netware server. Suppose we need to access HTML files from directory \home\htmldocs on volume VOL1: on the server MYDOM_NW, I recommend that you create a new user (say) 'EXPORT' with password 'EXP123' on this server to whom you grant appropriate access rights to this directory using SYSCON or NWADMIN. On the Linux machine create a new directory /mnt/MYDOM_NW. Now type the command ncpmount -S MYDOM_NW -U EXPORT -P EXP123 /mnt/MYDOM_NW to mount the netware file system. Typing the command ls /mnt/MYDOM_NW/vol1/home/htmldocs will show you a list of all the files in MYDOM_NW/VOL1:\HOME\HTMLDOCS (using Netware file notation). If you have any problems please read the IPX HOWTO at http://sunsite.unc.edu/mdw/HOWTO/IPX-HOWTO.html for more insights into the IPX system. 5.2. SMBFS To share the files on the Windows server you will need support for SMB (smbfs). You will need to download the SMB filesystem utilities from ftp://sunsite.unc.edu/pub/Linux/system/filesystems/smbfs/smbfs.tgz (currently smbfs-2.0.1) from Sunsite. 5.2.1. Installation To install the smbfs utilities, type zcat smbfs.tgz | tar xvf - to expand the files into its own directory. In this case you will get a directory smbfs-2.0.1 Change your directory to this smbfs directory before proceeding with the installation. Read the README and edit the Makefile if necessary. The installation of smbfs depends on the kernel version you are using. For kernel 1.2, you should simply type 'make'. Subsequently typing 'make install' will install the executables and man pages. If you use Kernel 2.0 or later, you might have to recompile your kernel. With these kernels, the kernel part of smbfs is already included in the main source tree. To check if the kernel needs to be recompiled type cat /proc/filesystems It should show you a line saying that the kernel knows smbfs. If smbfs is not there, you can either recompile the kernel or add smbfs as a module. For recompiling the kernel you should type 'make config' and when it asks you for adding SMB filesystem support simply answer yes. Once the kernel is successfully installed, reboot, check /proc/filesystems and if everything is OK proceed with the installation of the smbfs utilities. Change directory to the location holding your downloaded smbfs files, and type 'make'. After the compilation is finished type 'make install' to install the various utilities and man pages. 5.2.2. Mounting SMBFS In our example let us assume that the WinNT server is called 'MYDOM_NT' and is sharing its directory C:\PUB\HTMLDOCS with a share name of 'HTMLDOCS' without a password. On the Linux machine create a new directory /mnt/MYDOM_NT. Now type the command smbmount //MYDOM_NT/HTMLDOCS /mnt/MYDOM_NT -n to mount the SMB (windows share) file system. If this does not work try smbmount //MYDOM_NT/COMMON /mnt/MYDOM_NT -n -I 172.16.0.3 Typing the command ls /mnt/MYDOM_NT will show you a list of all the files in bsol;bsol;MYDOM_NT\PUB\HTMLDOCS (using Windows file notation). 5.3. NFS First you will need a kernel with the NFS file system either compiled in or available as a module. Suppose you have a Unix host running NFS with the name MYDOM_UNIX and an IP address of 172.16.0.4. You can check the directories that are being exported (shared) by this host by typing the command showmount -e 172.16.0.4 Once we know the exported directories you can mount them by entering a appropriate mount command. I recommend that you create a subdirectory under '/mnt' (say) 'MYDOM_UNIX' and use that as your mount point. mount -o rsize=1024,wsize=1024 172.16.0.4:/pub/htmldocs /mnt/MYDOM_UNIX The rsize and wsize may have to be changed depending on your environ­ ment. If you have any problems please read the NFS HOWTO at http://sunsite.unc.edu/mdw/HOWTO/NFS-HOWTO.html for more insights into the NFS system. 6. Accessing the Web Now that we have setup the HTTP server, the clients and interconnected the Linux server with the other servers, we need to make some small adjustments on the Linux server to be able to access these mounted filesystems from the Web Browser. 6.1. Accessing the mounted filesystems To access the mounted directories in your HTML pages you have two methods: · Create a link in DocumentRoot (/usr/local/etc/httpd/htdocs) to refer to the mounted directory as ln -s /mnt/MYDOM_NW/vol1/home/htmldocs netware or ln -s /mnt/MYDOM_NT winNT or ln -s /mnt/MYDOM_UNIX unix · to edit the file srm.conf in your /usr/local/etc/httpd/conf directory and add a new alias. # Alias fakename realname Alias /icons/ /usr/local/etc/httpd/icons/ # alias for netware server Alias /netware/ /mnt/MYDOM_NW/vol1/home/htmldocs/ Alias /winNT/ /mnt/MYDOM_NT/ Alias /unix/ /mnt/MYDOM_UNIX And restart your HTTPd. You can access the documents on the netware server by referring to them as http://linux.mydomain/netware/index.htm for the netware files and similar notations for the others. 6.2. Connecting to the Internet You can finally connect your Intranet to the Internet to access E-Mail and all the wonderful information out there. I propose to write a brief note on how to do this in a future revision. Detailed explanations are available in the ISP Hookup HOWTO from http://sunsite.unc.edu/mdw/HOWTO/ISP-Hookup-HOWTO.html and Diald mini HOWTO at http://sunsite.unc.edu/mdw/HOWTO/mini/Diald for setting up these connections. 6.3. Other uses The HTTP server can be used in the office to provide transparent access to information residing on different servers, at several locations and directories. The data can be simple documents in Word, Lotus spreadsheets, or complex databases. The application of this technology is being typically used as follows:- · Publishing corporate documents These documents can include newsletters, annual reports, maps, company facilities, price lists, product information literature, and any document which is of value within the corporate entity. · Access into searchable directories Rapid access to corporate phone books and the like. This data can be mirrored at a Web site or, via CGI scripts, the Web server can serve as a gateway to back-end pre-existing or new applications. This means that, using the same standard access mechanisms, information can be made more widely available and in a simpler manner. This means that it can be used to create an interface with RDBMS like ORACLE and SYBASE for generating real-time information. Here is a list of links to such sites on the Web. - Web Access - http://cscsun1.larc.nasa.gov/~beowulf/db/web_access.html - CGI gateways - HTTP://www.w3.org/hypertext/WWW/RDBGate/Overview.html · Corporate/Department/Individual pages As cultures change within organistions to the point where even each department moves towards their own individual mission statements, the Intranet technology provides the ideal medium to communicate current information to the Department or Individual. Powerful search engines provide the means for people to find the group or individual who has the answers to the continuous questions which arise in the normal day-to-day course of doing business. · Simple Groupware applications With HTML forms support, sites can provide sign-up sheets, surveys and simple scheduling. · Software distribution Administrators can use the Intranet to deliver software and up- dates on-demand to users across the corporate network . This can be done with 'Java' which allows the creation and transparent distribution of objects on-demand rather than just data or applications. This is indeed possible more easily with the newer versions of Linux which has builtin support for Java. · Mail With the move to the use of Intranet mail products with standard and simple methods for attachment of documents, sound, vision and other multimedia between individuals, mail is being pushed further forward as a simple, de facto communications method. Mail is essentially individual to individual, or individual to small group, communication. Several utilities are available on the Linux platform to setup an E-mail system like sendmail, pop3d, imapd. · User Interface The Intranet technology is evolving so rapidly that the tools available, in particular HTML, can be used to dramatically change the way we interface with systems. With HTML you can build an Interface which is only limited by the creators imagination. The beauty about using Intranet technologies for this is that it is so simple. Clicking a hyperlink from HTML can take you to another page, it could ring an alarm, run a yearend procedure or anything else that a computer program can do. 7. More things to do Here is a list of other interesting things to do with your Linux Intranet server. All the software mentioned below is freeware or shareware. · Browse the Linux server using Network Neighbourhood in Win95/ NT; Setup a WINS like NBT server. Check out the SAMBA Web page at http://lake.canberra.edu.au/pub/samba/samba.html · Implement a search engine on your Intranet. Connect to ht://Dig at http://htdig.sdsu.edu/ · Use CUSeeMe by setting up a local reflector. Refer to their page at Cornell http://cu-seeme.cornell.edu/ · Setup Web Conferencing. Use COW from http://thecity.sfsu.edu/COW/ · Deploy a SQL database. Refer to the mSQL Home page at http://Hughes.com.au/ · Setup FTP,Gopher,Finger,Bootp servers on the Netware server. Get them at http://mft.ucs.ed.ac.uk/ · Emulate a Netware server. Check out the NCP Utilities at ftp://sunsite.unc.edu/pub/Linux/system/filesystems/ncpfs/ If you find other interesting things to do with your Linux Intranet server, please feel free to mail me. 8. Credits and Legalities 8.1. Thanks Thanks to the people at NCSA for providing such excellent documentation, David Anderson and all others for trying out this HOWTO and sending in their comments. The details on Netware/IP are courtesy Romel Flores (rom@mnl.sequel.net). 8.2. Copyright information This document is copyrighted © 1996,1997 Pramod Karnad and distributed under the following terms: · Linux HOWTO documents may be reproduced and distributed in whole or in part, in any medium physical or electronic, as long as this copyright notice is retained on all copies. Commercial redistribution is allowed and encouraged; however, the author would like to be notified of any such distributions. · All translations, derivative works, or aggregate works incorporating any Linux HOWTO documents must be covered under this copyright notice. That is, you may not produce a derivative work from a HOWTO and impose additional restrictions on its distribution. Exceptions to these rules may be granted under certain conditions; please contact the Linux HOWTO coordinator at the address given below. · If you have questions, please contact Greg Hankins, the Linux HOWTO coordinator, at gregh@sunsite.unc.edu Finger for phone number and snail mail address.