Allow outgoing LDAP client request from firewall host 202.54.1.20:
iptables -A OUTPUT -p udp -s 202.54.1.20 --sport 1024:65535 -d 0/0 --dport 389 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A INPUT -p udp -s 0/0 --sport 389 -d 202.54.1.20 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT
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