WWW caching service by default listen on TCP 8080 port. Following iptables rules allows WEBCACHE incoming client request (open TCP port 8080) for server IP address 202.54.1.20:
iptables -A INPUT -p tcp -s 0/0 --sport 1024:65535 -d 202.54.1.20 --dport 8080 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -p tcp -s 202.54.1.20 --sport 8080 -d 0/0 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT
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