I have a question regarding how to unblock the incoming connections from the source NAT box. If I have source machine behind the NAT , how should I configure my iptable rules to unblock the connections coming from that particular host only. 1) How should I specify my rule to unblock only particular host behing the source NAt only 2)How to unblock the particular host behind the particular NAT box (can allow the connections from other host behind the same NAt also) Thanks Vidya Sagar Ravipati