Changing firewall setting in Redhat7.3
 

I have Redhat 7.3. I am unable to change my Firewall settings that were set during the installation. I have tried to change it many times doing the following:

1) type 'setup'
2) select Filewall settings
3) set firewall level to none

press OKs and close the setup. But still ftp and telnet connections are denied. If i go back and check the settings again it shows that it is still set to HIGH.

What am i doing wrong??

Yaser

You really should think about creating your own firewall. RH 7.3 uses ipchains by default, iptables better, IMHO...

To turn off your firewall, use /etc/init.d/ipchains stop

I don't know how to modify the RH settings, but if you decide to go with your own firewall, create a script and replace /etc/init.d/iptables with yours, then uninstall the lokkit and ipchains rpm's. Iptables is already installed, so you should then be able to start you firewall with /etc/init.d/iptables start

HTH

This is what happened when i tried to switch off the firewall using your method:


[root@localhost /]# /etc/init.d/ipchains stop
Flushing all chains: ipchains: Incompatible with this kernel
[FAILED]
Removing user defined chains: ipchains: Incompatible with this kernel
[FAILED]
Resetting built-in chains to the default ACCEPT policy:ipchains: Protocol not available
[FAILED]
[root@localhost /]#


And no effect on the filewall, i tried to ftp my system and the connection is still refused.

Any comments what went wrong!

Yaser

run ntsysv and make sure that iptables, ipchains and possibly even ip6tables (this shouldn't affect it as it for ipv6) do not start at boot time.

I know I'm probably teaching you to suck eggs here but have you made sure that telnet and ftp are started? (Also, what ftp server are you running - vsftpd is the best by a long way).

Also, are you using tcpwrappers? might be an idea if you go into /etc/hosts.allow and /etc/hosts.deny and have a butchers there. If you find anything then comment it out. you can always uncomment it later.

Good Luck. Let me know the results