# Reg. nginx\_tcp\_proxy\_module **URL:** \ **Category:** NGINX\ **Created:** [April 23, 2013, 8:29am UTC](https://www.ruby-forum.com/t/reg-nginx-tcp-proxy-module/228460 "2013-04-23T08:29:50Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![eswar\_r](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/e/e47774/32.png) [@eswar\_r](https://www.ruby-forum.com/u/eswar_r)\ **Post date:** [April 23, 2013, 8:29am UTC](https://www.ruby-forum.com/t/reg-nginx-tcp-proxy-module/228460/1 "2013-04-23T08:29:50Z")
Hi All, I have a below setup: netcat client (nc localhost 8081) =====\>nginx server(8081) with tcp\_proxy module=====\>2 netcat servers(8031 and 8032) $ nc localhost 8081 biiiiiiiiiiiiiiiiii $ nc -lk 8031 biiiiiiiiiiiiiiiiii $ nc -lk 8032 If I kill the process $ nc -lk 8031, the client is also getting killed. I expect the nginx server would read 0 bytes upon closing the connection to 8031 server and it detects the server failover and it establishes the connection to 8032 server so that the clients won’t experience any downtime. Since the client establishes connection to only nginx at 8081, it should be shielded from failover of 8031 server. Can anyone please help me if my understanding is wrong ?? Thanks Eswar Rao ---
**Author:** ![eswar\_r](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/e/e47774/32.png) [@eswar\_r](https://www.ruby-forum.com/u/eswar_r)\ **Post date:** [April 23, 2013, 9:04am UTC](https://www.ruby-forum.com/t/reg-nginx-tcp-proxy-module/228460/2 "2013-04-23T09:04:53Z")
Hello! On Tue, Apr 23, 2013 at 11:59:22AM +0530, ESWAR RAO wrote: > $ nc -lk 8031 > downtime. Since the client establishes connection to only nginx at 8081, it > should be shielded from failover of 8031 server. > > Can anyone please help me if my understanding is wrong ?? While I’m not really familiar with 3rd party tcp\_proxy module, the “reestablishing” connection would be really unexpected behaviour - as the module doesn’t know anything about the protocol and can’t assume there is no states associated with a connection on a client and/or on a server. That is, just dropping the connection looks correct. What the module can do is to select a working server on connection establishment. – Maxim D. > **[nginx: donation](http://nginx.org/en/donation.html)**