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| Subject: | Re: iptables & tcp wrappers |
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| Date: | Mon, 4 Oct 2004 00:01:13 +0200 |
On 2004-09-29 harry wrote:
Whelan, Paul wrote:"iptables -L --line-numbers" will show you the line numbers of the rules. "iptables -A INPUT -p tcp -s ! ONLY_IP_YOU_WANT --dport 22 -j DROP" will block every connection to port 22 except ONLY_IP_YOU_WANT.not really... a good firewall (IMHO) drops everything, rejects auth (nasty timeouts on ftp, irc, ... if you just drop auth), and accepts these 4(or 5) icmp requests: "source-quench" "parameter-problem" "time-exceeded" "destination-unreachable" and your clients probably want the "echo-request" too :)
Add "fragmentation-needed" and "echo-reply". Regards Ansgar Wiechers -- "Those who would give up liberty for a little temporary safety deserve neither liberty nor safety, and will lose both." --Benjamin Franklin
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