How to Accept SMTP Requests for Subnet Only
Hello,
how do I allow ip addresses for subnet 192.165.x.x to access my server via SMTP but any other subnet outside of that group is rejected? I tried the following syntax: iptables -I INPUT 1 -s 192.165.0.0/16 -d 192.165.17.3 -p tcp --dport 25 --tcp-flags SYN,RST,ACK SYN -j ACCEPT iptables -A INPUT -d 192.168.17.3 -j REJECT Will this work? |
what about hosts.allow and hosts.deny ?
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This kind of restriction should be part of your MTA (Postfix certainly is able to define the network connection).
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This is true. However, I want Postfix to drop e-mail from the outside world and only allow connections from within out internal network. Perhaps I'll take this to a Postfix forum.
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