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I am running RH 8 here at work, and Im havng an issue with configuring the firewall. I cant have the Linux machine plugged directly into our network, so I am using a crossover cable to connect directly from a Windows machine. The RH machine is a dual boot, so when I log into Windows on it, the two machines have no trouble communicating. Linux sees the NIC as having the following config:
IP: 192.168.1.102 (I have 2 NICs in my main Windows box, which is not dual boot---the IP on that machines NIC is 192.168.1.101)
In other words, these two are on thier own private network, enabled by the crossover cable. I tried to use a serial cable, but that didn't really work out either. My real problem is that Linux will not allow me to change the firewall though the Security Level Configuration GUI in GNOME. It is stuck at "High" and the "Use default firewall rules" radio button is checked. When I try to change it, it appears to take affect, even warning me about the change, then I click "Yes". I am logged on as root (or su), so that is not the issue. I need to change this setting to "Customize" so that I can allow SSH. Any suggestions are appreciated.
OK, I'll check it out, but I am able to ping it and the firewall settings were available before when my IP was set so that I was connected into our main network. At that time, the NIC was working fine, and I could get out onto the Internet, etc. no problem.
Distribution: WinXP SP2 and SP3, W2K Server, Ubuntu
Just a guess. But to get around the bug could you use the ncurses based tool in RedHat called Lokkit? This may work if the GNOME tool is not recording the changes to the iptables configuration file. Also, would it be possible to edit the configuration file directly?
I tried lokkit, but it is still unchanged, even after the lokkit interface seemed to make the changes successfully. I am now trying to decipher the /etc/sysconfig/iptables file in an attempt to alter this file directly.