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Old 06-21-2003, 10:26 PM   #1
Registered: Aug 2002
Location: Phoenix, AZ
Distribution: PCLinuxOS 2012.08
Posts: 430

Rep: Reputation: 30
can't use simple firewall script (it worked before)

I'm running Knoppix 3.2 v 6-6-2003. I learned a very simple script for a firewall that worked like a charm in Slack 8.1 and Knoppix 3.1. Now I can't type it into /sbin/iptables without getting this error message:

root@luciano:/home/tigerflag# /sbin/iptables -A INPUT -p tcp -syn -j DROP
iptables v1.2.7a: host/network `-syn' not found
Try `iptables -h' or 'iptables --help' for more information.

I know zip about firewall scripts, just that this worked great for my stand-alone box on a dial-up connection.
Any suggestions as to what I'm doing wrong, or what I might change?

Siri Amrit
Old 06-22-2003, 07:49 AM   #2
Registered: Mar 2003
Location: Scotland
Distribution: Slackware, RedHat, Debian
Posts: 12,047

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I think it should be "--syn" not "-syn". Note the extra "-"
Old 06-23-2003, 01:10 AM   #3
Registered: Aug 2002
Location: Phoenix, AZ
Distribution: PCLinuxOS 2012.08
Posts: 430

Original Poster
Rep: Reputation: 30
That was it! Thanks, David!


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