[stunnel-users] transparent = source, stunnel connect always times out

Michal Trojnara Michal.Trojnara at mirt.net
Sat Mar 26 22:50:23 CET 2011

Robert Hardy wrote:
> I've been fighting with stunnel, trying to get its transparent proxy  
> support
> to work. No matter what I do, as soon as transparent = source  
> support is
> turned on, tests with my mail client just time out.
> If I turn transparent proxy support off it works but appears as if
> connections are from localhost, which is undesirable.
> 2011.03.20 15:26:57 LOG6[23220:3073874832]: local_bind succeeded on  
> the original port
> 2011.03.20 15:26:57 LOG6[23220:3073874832]: connect_blocking:  
> connecting MY_EXTERNAL_IP:25
> 2011.03.20 15:26:57 LOG7[23220:3073874832]: connect_blocking:  
> s_poll_wait MY_EXTERNAL_IP:25: waiting 60 seconds
> 2011.03.20 15:27:57 LOG3[23220:3073874832]: connect_blocking:  
> s_poll_wait MY_EXTERNAL_IP:25: TIMEOUTconnect exceeded

Interesting.  I can't see any obvious mistake in your configuration.

With these type of problems "tcpdump", "iptables -L -v", and "dmesg"  
are your friends.

Best regards,
	Michal Trojnara
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