filtered ports

[Matthew J. Brodeur]

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On Fri, 2 Nov 2001, dlewis wrote:

> Hello. I am using RedHat 7.1 (kernel 2.4.13-ac5). I am trying to set up
> ssh (having sshd up). When someone scans me via nmap, it says that port
> 22 is filtered. I know i don't have iptables or ipchains set up. I was
> also told that RedHat has a default firewall setting that filters ports.
> How can I fix this? Thank you.

first thing to try is:
/etc/init.d/ipchains stop
/etc/init.d/iptables stop

   That will flush any firewall rules that might be loaded.  I swear I've
seen RH7.1 block ports even when I've selected "No firewall" during the
install.  If this works you can make it permanent by:

chkconfig ipchains off
chkconfig iptables off

   I personally would remove ipchains completely on a system like this,
but that's up to you.

   You didn't mention whether the nmap scan was from a local or remote
machine.  If it was remote then your ISP could be blocking ports for you.
I don't know of any currently blocking 22, but it's possible.  If that's
the case, I'd complain LOUDLY.


- -- 
     -Matt

God shows his contempt for wealth by the kind of person he selects to
receive it.
		-- Austin O'Malley
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