Client behind FW cannot get out

Top Page
Attachments:
Message as email
+ (text/plain)
Delete this message
Reply to this message
Author: der.hansPLUGd@LuftHans.com
Date:  
Subject: Client behind FW cannot get out
Am 09. Jun, 2000 schwäzte so:

> I'm no expert but since nobody else has chimed in... You
> might recheck your script and make sure everything's in
> order; ip forwarding is enabled, masq modules are loaded...
>
> to see if forwarding's on type (as root, I s'pose) 
>     cat /proc/sys/net/ipv4/ip_forward
> if it doesn't display "1" without the quotes then do:
>     echo "1" > /proc/sys/net/ipv4/ip_forward


ip_forward is the part I always forget to check by hand when debugging a
setup :).

RH 6.1 should be kernel 2.2.x ( next time let us know for certain :). If
that's true, then use "ipchains -L -n | less" to look at your
firewall/masq rules.

On the Linux box, pull up sniffit in one window and look for connections.
>From the 98 box try several things to the Linux box, e.g. ping,

traceroute, telnet, web, ftp, ssh. Now try those same services against
hosts on the net.

If this isn't getting you anywhere, redo some of your rules with the
"-l" option to log packets into syslogd. Now try stuff specifically
against those rules.

Oh, and get a surge protector and a ups and forget about the storms ;-).

ciao,

der.hans
--
# home.pages.de/~lufthans/ www.Opnix.com
# Motorraeder toeten nicht. Motorraeder werden getoetet.