I'm trying to put Postfix behind inetd. The idea is to configure inetd to listen to inet smtp port and make Postfix listen to a unix-domain one.
Is it possible to make inetd pass connection over to a unix-domain socket?
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2Why on earth are you doing this? – Michael Hampton Feb 20 '21 at 21:51
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Want to have tcp wrappers filter connections. – yaugenka Feb 21 '21 at 08:21
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1People still try to use those? Just use the firewall like everyone else. – Michael Hampton Feb 21 '21 at 17:04
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I would love to if there was a firewall with host lookup capability. – yaugenka Feb 21 '21 at 17:41
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Try creating a service in inetd with
server = /usr/bin/socat
server_args = socat STDIO UNIX-CONNECT:/path/to/unix/socket
This will connect the service I/O to the socket. See man socat.
Andrew Schulman
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socan always stays in between. it does not hand a connection over and leave, right? – yaugenka Feb 22 '21 at 20:13
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Right. It'll continue to run, as the intermediary between inetd and postfix. So instead of client <-> postfix, you'll have client <-> inetd <-> socat <-> postfix. But it should work fine. – Andrew Schulman Feb 22 '21 at 20:23
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