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On TCP connections held by NGinx, can it be configured to send TCP Keepalive

(Not HTTP KeepAlive!)

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4 Answers 4

Use the source, Luke.

(but why would you want to do such a thing?)

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So our firewall would not disconnect long lived connections. –  ripper234 Oct 22 '10 at 20:51
Why don't you just tell your firewall not to terminate long connections? –  symcbean Oct 25 '10 at 8:03
Because there might be other firewalls along the way - I don't control them all. –  ripper234 Dec 3 '10 at 6:36

At the moment, only mail proxy module supports "so_keepalive" directive.

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There is as LD_PRELOAD module that turns keepalives on, even if the app doesn't have an option to do so. (I don't know if it works with nginx or not.)

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