# Nginx/0.8.54 - 502 Bad Gateway **URL:** \ **Category:** NGINX\ **Created:** [July 20, 2011, 3:43pm UTC](https://www.ruby-forum.com/t/nginx-0-8-54-502-bad-gateway/209691 "2011-07-20T15:43:40Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![luislavena](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/0ea827/32.png) [@luislavena](https://www.ruby-forum.com/u/luislavena)\ **Post date:** [July 20, 2011, 3:43pm UTC](https://www.ruby-forum.com/t/nginx-0-8-54-502-bad-gateway/209691/1 "2011-07-20T15:43:40Z")
Hi, I’m running nginx as a reverse proxy for a jetty. I host a Liftweb App on localhost:8080. Nginx is listening on Port 81. Here is my nginx.conf: server { listen 81; server\_name [mysite.com](http://mysite.com) [www.mysite.com](http://www.mysite.com); ``` location / { proxy_pass http://127.0.0.1:8080; proxy_set_header X-Real-IP $remote_addr; proxy_read_timeout 700; proxy_set_header Host $http_host; proxy_set_header X-Forwarded-For ``` $proxy\_add\_x\_forwarded\_for; } } When I try to point my browser to [mysite.com:81](http://mysite.com:81) I always get a 502 Bad Gateway message. I checked the log and found this: connect() failed (111: Connection refused) while connecting to upstream, client: 12.34.567.890, server: [mysite.com](http://mysite.com), request: “GET /favicon.ico HTTP/1.1”, upstream: “[http://127.0.0.1:8080/favicon.ico](http://127.0.0.1:8080/favicon.ico)”, host: “[mysite.com:81](http://mysite.com:81)” Does this means this port is blocked? I tried other but the result is still the same… My hosting company gave me the advice better not to use port 80 (i’m in china) and use some socket instead. I don’t know what they mean by that. I use port 81 for nginx now. Anyone an idea what they could mean by “use sockets”? I read somewhere that i can later forward all traffic from 81 to port 80. Any hints a very much appreciated. Thanks. Posted at Nginx Forum: > **[nginx/0.8.54 - 502 Bad Gateway](https://forum.nginx.org/read.php?2,212680,212680#msg-212680)** > > Hi, I'm running nginx as a reverse proxy for a jetty. I host a Liftweb App on localhost:8080. Nginx is listening on Port 81. Here is my nginx.conf: server { listen 81; server\_name mysite.com www.mysite.com; ---
**Author:** ![nginxn00b](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/f4b2a3/32.png) [@nginxn00b](https://www.ruby-forum.com/u/nginxn00b)\ **Post date:** [July 20, 2011, 6:00pm UTC](https://www.ruby-forum.com/t/nginx-0-8-54-502-bad-gateway/209691/2 "2011-07-20T18:00:30Z")
On 20 Jul 2011 14h43 WEST, [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > When I try to point my browser to mysite.com:81 I always get a 502 > Bad Gateway message. I checked the log and found this: There’s a problem in your upstream. Its refusing the connection? Do you have some sort of access controls on it? Try: curl -I [http://localhost:8080](http://localhost:8080) and see if you can connect. > connect() failed (111: Connection refused) while connecting to > upstream, client: 12.34.567.890, server: [mysite.com](http://mysite.com), request: “GET > /favicon.ico HTTP/1.1”, upstream: > “[http://127.0.0.1:8080/favicon.ico](http://127.0.0.1:8080/favicon.ico)”, host: “mysite.com:81” > Does this means this port is blocked? I tried other but the result > is still the same… > > My hosting company gave me the advice better not to use port 80 (i’m > in china) and use some socket instead. I don’t know what they mean > by that. I use port 81 for nginx now. Anyone an idea what they > could mean by “use sockets”? I read somewhere that i can later > forward all traffic from 81 to port 80. If you want it to work transparently use port 80 for your frontend. — appa ---
**Author:** ![nginxn00b](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/f4b2a3/32.png) [@nginxn00b](https://www.ruby-forum.com/u/nginxn00b)\ **Post date:** [July 20, 2011, 6:19pm UTC](https://www.ruby-forum.com/t/nginx-0-8-54-502-bad-gateway/209691/3 "2011-07-20T18:19:03Z")
Access control? Not that I know of. I didn’t touch the firewall yet, so I guess there is none enable right now. > > curl -I [http://localhost:8080](http://localhost:8080) and see if you can connect. I did this on the server and I got: curl -I [http://localhost:8080](http://localhost:8080) curl: (7) couldn’t connect to host And I tried from a remote client to connect via curl and got: curl -I [http://myside.com:81](http://myside.com:81) HTTP/1.1 502 Bad Gateway Server: nginx/0.8.54 Date: Wed, 20 Jul 2011 16:14:04 GMT Content-Type: text/html Content-Length: 172 Connection: keep-alive Any clue? Posted at Nginx Forum: [http://forum.nginx.org/read.php?2,212680,212691#msg-212691](http://forum.nginx.org/read.php?2,212680,212691#msg-212691) ---
**Author:** ![nginxn00b](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/f4b2a3/32.png) [@nginxn00b](https://www.ruby-forum.com/u/nginxn00b)\ **Post date:** [July 20, 2011, 6:27pm UTC](https://www.ruby-forum.com/t/nginx-0-8-54-502-bad-gateway/209691/4 "2011-07-20T18:27:45Z")
> > curl -I [http://localhost:8080](http://localhost:8080) and see if you can connect. > I did this on the server and I got: > curl -I [http://localhost:8080](http://localhost:8080) > curl: (7) couldn’t connect to host Your backend / application isn’t working that’s why nginx can’t connect to it and has to return 502. rr ---
**Author:** ![nginxn00b](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/f4b2a3/32.png) [@nginxn00b](https://www.ruby-forum.com/u/nginxn00b)\ **Post date:** [July 20, 2011, 6:44pm UTC](https://www.ruby-forum.com/t/nginx-0-8-54-502-bad-gateway/209691/5 "2011-07-20T18:44:30Z")
Er, wrong email. Sorry! ---
**Author:** ![nginxn00b](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/f4b2a3/32.png) [@nginxn00b](https://www.ruby-forum.com/u/nginxn00b)\ **Post date:** [July 20, 2011, 6:40pm UTC](https://www.ruby-forum.com/t/nginx-0-8-54-502-bad-gateway/209691/6 "2011-07-20T18:40:08Z")
all set, my fault. ---
**Author:** ![nginxn00b](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/f4b2a3/32.png) [@nginxn00b](https://www.ruby-forum.com/u/nginxn00b)\ **Post date:** [July 21, 2011, 9:07am UTC](https://www.ruby-forum.com/t/nginx-0-8-54-502-bad-gateway/209691/7 "2011-07-21T09:07:41Z")
Hello, First replace proxy\_pass [http://127.0.0.1:8080](http://127.0.0.1:8080); by proxy\_pass [http://monsite.com:8080](http://monsite.com:8080); If that doesn’t work, look at firewall settings, yes. Port 8080 on the upstream must be accessible from the machine running nginx (even if they are the same physical machine). A. ---
**Author:** ![nginxn00b](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/f4b2a3/32.png) [@nginxn00b](https://www.ruby-forum.com/u/nginxn00b)\ **Post date:** [July 21, 2011, 6:41am UTC](https://www.ruby-forum.com/t/nginx-0-8-54-502-bad-gateway/209691/8 "2011-07-21T06:41:09Z")
> > Your backend / application isn’t working that’s why nginx can’t > > connect to it and has to return 502. The app is up and running on port 8080. I can access the app directly using mysite.com:8080. Do I have to configure something else, maybe the firewall? Posted at Nginx Forum: [http://forum.nginx.org/read.php?2,212680,212719#msg-212719](http://forum.nginx.org/read.php?2,212680,212719#msg-212719) ---
**Author:** ![nginxn00b](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/f4b2a3/32.png) [@nginxn00b](https://www.ruby-forum.com/u/nginxn00b)\ **Post date:** [July 21, 2011, 12:01pm UTC](https://www.ruby-forum.com/t/nginx-0-8-54-502-bad-gateway/209691/9 "2011-07-21T12:01:46Z")
Did you try to just have your nginx listen on port 80 and see if it works ? A. ---
**Author:** ![nginxn00b](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/f4b2a3/32.png) [@nginxn00b](https://www.ruby-forum.com/u/nginxn00b)\ **Post date:** [July 21, 2011, 11:10am UTC](https://www.ruby-forum.com/t/nginx-0-8-54-502-bad-gateway/209691/10 "2011-07-21T11:10:57Z")
> > First replace > > proxy\_pass [http://127.0.0.1:8080](http://127.0.0.1:8080); > > by > > proxy\_pass [http://monsite.com:8080](http://monsite.com:8080); Gee, so simple! Yes, that worked. Thank you very much!! To finish everything I need to forward port 81 to port 80. I guess a firewall rule will help me out here. Posted at Nginx Forum: [http://forum.nginx.org/read.php?2,212680,212734#msg-212734](http://forum.nginx.org/read.php?2,212680,212734#msg-212734) ---
**Author:** ![nginxn00b](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/f4b2a3/32.png) [@nginxn00b](https://www.ruby-forum.com/u/nginxn00b)\ **Post date:** [July 21, 2011, 2:06pm UTC](https://www.ruby-forum.com/t/nginx-0-8-54-502-bad-gateway/209691/11 "2011-07-21T14:06:57Z")
> > Did you try to just have your nginx listen on port 80 and see if it > > works ? Yes, I did. It is not working. I need to whitelist my IP and for that I have to do some more paperwork. I’m in China. But my Chinese hosting company said I should use Socket (Socks?), but I don’t know what they mean by that. My solution was to use another port (like port 81) and forward the traffic then. Any other solutions possible? Posted at Nginx Forum: [http://forum.nginx.org/read.php?2,212680,212752#msg-212752](http://forum.nginx.org/read.php?2,212680,212752#msg-212752) ---
**Author:** ![nginxn00b](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/f4b2a3/32.png) [@nginxn00b](https://www.ruby-forum.com/u/nginxn00b)\ **Post date:** [July 22, 2011, 9:25am UTC](https://www.ruby-forum.com/t/nginx-0-8-54-502-bad-gateway/209691/12 "2011-07-22T09:25:34Z")
I have no clue what they mean when they say you should use Socks. If they don’t let TCP traffic go to port 80 on your machine, there is nothing you can do but publish your URLs as [http://monsite.com:81/](http://monsite.com:81/)… Of course, you could also do the paperwork. A.