Configuring iptables
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IMAP
Runs on port 143, so...
iptables -A INPUT -p tcp -s 0/0 --sport 1024:65535 -d 202.54.1.20 --dport 143 -m state --state NEW,ESTABLISHED -j ACCEPT iptables -A OUTPUT -p tcp -s 202.54.1.20 --sport 143 -d 0/0 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT
See:
Flushing Rules
#!/bin/sh echo "Stopping firewall and allowing everyone..." iptables -F iptables -X iptables -t nat -F iptables -t nat -X iptables -t mangle -F iptables -t mangle -X iptables -P INPUT ACCEPT iptables -P FORWARD ACCEPT iptables -P OUTPUT ACCEPT
See: