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236 Useful tools for Red Hat Enterprise Linux WS 4

DONE

INDEX

Now the configuration of the Firewall is finished and your system is protected

right now.

Note that this tool described here allows not a very specific configuration, but it is

useful for a quick and secure setting. In case you like to free another service like

smb you can use the start command

redhat-config-securitylevel-tui

(note that the securitylevel-tui is one word and contains no space)

A window appears wherein you can define the same rules as above described but

you get an additional field called ‚Other ports‘.

Another useful tool is the freeware guarddog that can be downloaded from:

http://www.simonzone.com/software/guarddog/

All these three ways that were described in this chapter uses the firewall tool of

ED HAT ENTERPRISE LINUX WS 4 iptables. With iptables it is possible to define a

very complex firewall installation.

15.3 Tools for internal communication

If the Linux NMR workstation should be used as server, the following packages

should be installed:

Package on CD Necessary for

xinetd

ED HAT ENTERPRISE LINUX WS 4 Operat-

ing System CD 2 of 4

"superserver" for sev-

eral servers

telnet-server

ED HAT ENTERPRISE LINUX WS 4 Operat-

ing System CD 3 of 4

for telnet logins

vsftpd

on TopSpin 2.1 Linux CD in /linux/rpm

for ftp sessions

rsh-server

ED HAT ENTERPRISE LINUX WS 4 Operat-

ing System CD 3 of 4

for rlogin and rsh

samba

ED HAT ENTERPRISE LINUX WS 4 Operat-

ing System CD 2 of 4

to export directories to

Windows

samba-swat

ED HAT ENTERPRISE LINUX WS 4 Operat-

ing System CD 2 of 4

graphical configuration

toll for samba

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