Fwd: [CentOS] HOW to enable traceroute with IPTABLES

Hi,

I am setting up a firewall on CENTOS 4.4.

I have enabled ICMP to www.google.com

iptables -A OUTPUT -p icmp -d 64.233.189.104 -j ACCEPT iptables -A INPUT -p icmp -s 64.233.189.104 -j ACCEPT

traceroute uses by default UDP with port 33434.

br

Hi,

Thanks for your info.

I wrote below 2 rules

iptables -A OUTPUT -p udp -d 64.233.189.104 --dport 33434 -j ACCEPT iptables -A INPUT -p udp -s 64.233.189.104 --sport 33434 -j ACCEPT

Then I tried as below

[root@firebox rc.d]# traceroute 64.233.189.104 traceroute to 64.233.189.104 (64.233.189.104), 30 hops max, 38 byte packets traceroute: sendto: Operation not permitted 1 traceroute: wrote 64.233.189.104 38 chars, ret=-1 *traceroute: sendto: Operation not permitted traceroute: wrote 64.233.189.104 38 chars, ret=-1 *traceroute: sendto: Operation not permitted traceroute: wrote 64.233.189.104 38 chars, ret=-1 * traceroute: sendto: Operation not permitted 2 traceroute: wrote 64.233.189.104 38 chars, ret=-1

But Still the same.

WHY?

IF my rules are wrong can you rectify it ?

-- Marcin Mazurek

http://www.netsync.pl/ - :::: - nic-hdl: MM3380-RIPE GnuPG 6687 E661 98B0 AEE6 DA8B 7F48 AEE4 776F 5688 DC89

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