Nginx proxy_bind failing

[garycnew@yahoo.com]

All:

I discovered a single SYN packet being sent from 192.168.0.2:12345 (nginx
worker) when initiating traffic.  Nothing more.

# netstat -anp|grep 12345
tcp        0      1 192.168.0.2:12345       172.64.163.36:443       SYN_SENT
   14176/nginx: worker

For whatever reason, that packet isn't showing up in my promiscuous
tcpdump.

Question:  If 192.168.0.2:12345 doesn't receive a SYN,ACK will the nginx
worker use the next available interface address (i.e., 100.64.8.236:12345)
to establish a connection?

My goal is to use iptables to MARK the 192.168.0.2:12345 packets for routing
over an established OpenVPN Tunnel (tun12).

Any guidance is much appreciated.

Respectfully,


Gary

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,289823,289824#msg-289824