 | | | firewall ? | firewall ? 2003-01-06 - By Hailong Li
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Hi Steven,
Thank you very much for your help.
You are right. I think it was the firewall problem. I remember during the Redhat
7.2 installation, for the firewall, I selected " Medium" (sorry, it was not
"default"). Now, how can I shut down the firewall?
Thanks alot!
Hailong
>On Mon, 6 Jan 2003, Hailong Li wrote:
>
>> Hi there,
>> My computer --- computer 1 is redhat 7.2. I can ssh from computer 1 to
another
>> linux computer --- computer 2. But I can not ssh from computer 2 to computer
>> 1. I checked computer 1, sshd is on. When I installed Redhat 7.2 on computer
>> 1, for Firewall, I selected "Default". Was there anything wrong about it?
>
> First of all, test if the ssh problem is caused by the firewall.
>Temporarily shut it down and see if ssh to computer 1 works again. Then
>turn it back on. If you're running ipchains, "service ipchains stop" and
>"service ipchains start" brings your firewall down and back up. If
>"ipchains -L" shows something, ipchains is running.
> I don't know what "Default" did during installation, but there
>probably was something wrong with it. You can replace your current
>firewall by running "gnome-lokkit", and in the course of answering its
>questions, enable access to the ssh service. I believe it will install an
>ipchains firewall. After you've used gnome-lokkit, which is designed for
>beginners in linux, you may want to consider learning how to build
>firewalls for yourself. Start with "man iptables" because by 7.2 ipchains
>was becoming obsolete. Then look on the web for iptables documentation --
>for example
>http://www.netfilter.org/documentation/tutorials/blueflux/iptables-tutorial
.html
>
>
>--
>Steven Yellin
>
>
>
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