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Blocking port in iptables
This is a discussion on Blocking port in iptables within the Linux software forums, part of the Linux Getting Started category; hi i'm trying to block icmp applying this rule iptables -A INPUT -p icmp -s \! 192.168.2.26 -j DROP i ...
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17-07-2006, 03:35 PM
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Blocking port in iptables
hi
i'm trying to block icmp applying this rule iptables -A INPUT -p icmp -s \! 192.168.2.26 -j DROP i want to allow this host 192.168.2.26 except all, but this rule don't work it block also icmp request from this host. Any Help... Regards Asim 
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17-07-2006, 06:22 PM
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So you are applying rules on host having ip 192.168.2.26?
__________________
Vivek Gite Linux Evangelist  Be proud RHEL user, and let the world know about your enterprise choices! Join RedHat user group. Always use CODE tags for posting system output and commands! Do you run a Linux? Let's face it, you need help
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17-07-2006, 10:00 PM
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If default INPUT and OUTPUT policy is drop then you should use following rules for ICMP ping request:
Code:
SERVER_IP="192.168.1.50" CLIENT="192.168.1.10" iptables -A INPUT -p icmp --icmp-type 8 -s $CLIENT -d $SERVER_IP -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT iptables -A OUTPUT -p icmp --icmp-type 0 -s $SERVER_IP -d $CLIENT -m state --state ESTABLISHED,RELATED -j ACCEPT
__________________
Vivek Gite Linux Evangelist Be proud RHEL user, and let the world know about your enterprise choices! Join RedHat user group. Always use CODE tags for posting system output and commands! Do you run a Linux? Let's face it, you need help
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