# NetworkError 502 and 504 with UPnP Configuration Issues (ref#36O1W2) **URL:** \ **Category:** ARC: Port Forwarding Help\ **Tags:** rctt\_null-02-2\ **Created:** [May 6, 2026, 4:00pm UTC](https://community.roonlabs.com/t/networkerror-502-and-504-with-upnp-configuration-issues-ref-36o1w2/319763 "2026-05-06T16:00:35Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![Chrislayeruk](https://community.roonlabs.com/user_avatar/community.roonlabs.com/chrislayeruk/32/47983_2.png) [@Chrislayeruk](https://community.roonlabs.com/u/Chrislayeruk)\ **Post date:** [May 6, 2026, 4:00pm UTC](https://community.roonlabs.com/t/networkerror-502-and-504-with-upnp-configuration-issues-ref-36o1w2/319763/1 "2026-05-06T16:00:35Z")
#### Hi! What’s not quite right with Roon? · Can’t reach my Server, remotes or ARC #### Can’t connect to my Server, remotes or ARC · Other ARC issues #### Tell us what's going on · { "ipv4\_connectivity": {"status":"NetworkError","status\_code":502,"error":"error code: 502"}, "ipv6\_connectivity": {"status":"NetworkError","status\_code":504,"error":"error code: 504"}, "external\_ip": {"actual\_external\_ip":"86.aaa.bbb.ccc","actual\_external\_ipv6":"2a00:ddd:eee:fff:ggg:hhh:iii:jjj","router\_external\_ip":"null"}, "natpmp\_autoconfig": {"status":"NotFound"}, "upnp\_autoconfig": {"server\_ip":"192.168.1.254","found\_upnp":true,"error":"Did not find UPnP service with WANIPConnection on network"}, "multinat\_autoconfig": {"status":"Failed","error":"Port Already mapped to another Device"} } #### Tell us about your home network · BT Home Hub ---
**Author:** ![connor](https://community.roonlabs.com/user_avatar/community.roonlabs.com/connor/32/172788_2.png) [@connor](https://community.roonlabs.com/u/connor)\ **Post date:** [May 6, 2026, 5:27pm UTC](https://community.roonlabs.com/t/networkerror-502-and-504-with-upnp-configuration-issues-ref-36o1w2/319763/2 "2026-05-06T17:27:02Z")
Hi @Chrislayeruk, This looks like a port conflict with the actual port number Roon is attempting to use for ARC. Try changing the port number in Roon Settings → ARC to something else in the 56000-60000 range. If you’ve configured a manual rule in your router settings, you’ll need to change that port number to match what you configure in Roon. Please also double-check that UPnP is enabled in your router, if you have not set a manual rule. Let us know if we can assist further. We’ll watch for your reply. ---
**Author:** ![mjw](https://community.roonlabs.com/user_avatar/community.roonlabs.com/mjw/32/382057_2.png) [@mjw](https://community.roonlabs.com/u/mjw)\ **Post date:** [May 6, 2026, 6:10pm UTC](https://community.roonlabs.com/t/networkerror-502-and-504-with-upnp-configuration-issues-ref-36o1w2/319763/3 "2026-05-06T18:10:44Z")
@Chrislayeruk has recently moved from a QNAP to Mac. I suspect there is a rule for the QNAP using the port. Therefore, the solution is to edit the current port forwarding rule in the Home Hub, and change the IP address to the Mac’s IP address. ---
**Author:** ![Chrislayeruk](https://community.roonlabs.com/user_avatar/community.roonlabs.com/chrislayeruk/32/47983_2.png) [@Chrislayeruk](https://community.roonlabs.com/u/Chrislayeruk)\ **Post date:** [May 6, 2026, 8:50pm UTC](https://community.roonlabs.com/t/networkerror-502-and-504-with-upnp-configuration-issues-ref-36o1w2/319763/4 "2026-05-06T20:50:01Z")
This is a screenshot of my hub ![IMG_1975](https://roon-community-uploads.s3.amazonaws.com/original/4X/3/5/f/35f79b52a8dd386e5113e032a6b9139984997714.jpeg) ---
**Author:** ![Chrislayeruk](https://community.roonlabs.com/user_avatar/community.roonlabs.com/chrislayeruk/32/47983_2.png) [@Chrislayeruk](https://community.roonlabs.com/u/Chrislayeruk)\ **Post date:** [May 6, 2026, 9:16pm UTC](https://community.roonlabs.com/t/networkerror-502-and-504-with-upnp-configuration-issues-ref-36o1w2/319763/5 "2026-05-06T21:16:39Z")
Well, to my surprise with some bumbling around, I have ARC working. I deleted the old ARC rule in my router and created a new one. I toggled UPnp on and off This is a screenshot of how it works. The UPnP Green tick is missing, I don’t see how to enable it, and is that important? Ok, looks like I have got ahead of myself. ARC on my phone is in Offline Mode. Uncertain how to change that. Any further help appreciated. The saga continues, found the offline mode toggle switch. Now it’s not working… ![IMG_1976](https://roon-community-uploads.s3.amazonaws.com/original/4X/3/4/6/346277c13040bb0512df39704651992b5f602988.jpeg) ---
**Author:** ![mjw](https://community.roonlabs.com/user_avatar/community.roonlabs.com/mjw/32/382057_2.png) [@mjw](https://community.roonlabs.com/u/mjw)\ **Post date:** [May 7, 2026, 7:15am UTC](https://community.roonlabs.com/t/networkerror-502-and-504-with-upnp-configuration-issues-ref-36o1w2/319763/6 "2026-05-07T07:15:47Z")
Chris, please share a screenshot of Roon Settings → Roon ARC. Also, did you setup all those ports, or has Roon done this for you? ---
**Author:** ![Chrislayeruk](https://community.roonlabs.com/user_avatar/community.roonlabs.com/chrislayeruk/32/47983_2.png) [@Chrislayeruk](https://community.roonlabs.com/u/Chrislayeruk)\ **Post date:** [May 7, 2026, 10:51am UTC](https://community.roonlabs.com/t/networkerror-502-and-504-with-upnp-configuration-issues-ref-36o1w2/319763/7 "2026-05-07T10:51:14Z")
Thanks again for your assistance, yes, Roon made all those apart from the lower one without the UPnp green tick. I made that one. This is ARC in Roon on my iPad app. ![IMG_1978](https://roon-community-uploads.s3.amazonaws.com/original/4X/e/e/0/ee096525c2c5ff4b3a2e88cf0fc1e0c9f713fe0d.jpeg) ---
**Author:** ![mjw](https://community.roonlabs.com/user_avatar/community.roonlabs.com/mjw/32/382057_2.png) [@mjw](https://community.roonlabs.com/u/mjw)\ **Post date:** [May 7, 2026, 11:20am UTC](https://community.roonlabs.com/t/networkerror-502-and-504-with-upnp-configuration-issues-ref-36o1w2/319763/8 "2026-05-07T11:20:41Z")
Okay, so what you should do is delete all of the entries with “Roon Auto Port Mapping”. Indeed, if you don’t have any other devices that need port forwarding, I’d disable UPnP. Finally, edit the last entry, “RoonARC” as follows: **RoonARC MacMini 55000 55000 55000 55000 TCP** Save the settings, and then in Roon Settings → Roon ARC, change the port back to 55000. Presently, you have way too many ports open. Test this on a mobile phone using 4/5G with WiFi turned off. ---
**Author:** ![Chrislayeruk](https://community.roonlabs.com/user_avatar/community.roonlabs.com/chrislayeruk/32/47983_2.png) [@Chrislayeruk](https://community.roonlabs.com/u/Chrislayeruk)\ **Post date:** [May 8, 2026, 6:57am UTC](https://community.roonlabs.com/t/networkerror-502-and-504-with-upnp-configuration-issues-ref-36o1w2/319763/9 "2026-05-08T06:57:16Z")
Thank you, I have managed to do this, Roon is working well, but ARC won’t connect via my android phone. Google pixel 8 pro… With Wi-Fi on or off. I have looked in settings on the ARC app and can see not rules blocking it. Thanks again for all you help. ![IMG_1980](https://roon-community-uploads.s3.amazonaws.com/original/4X/5/9/a/59aa2f6a99f052ee9db018a98f9a1e6ca0ff7602.jpeg) ![IMG_1979](https://roon-community-uploads.s3.amazonaws.com/original/4X/3/d/a/3dac37e621550ac023c71fc5135982e1ab43d36e.jpeg) ---
**Author:** ![mjw](https://community.roonlabs.com/user_avatar/community.roonlabs.com/mjw/32/382057_2.png) [@mjw](https://community.roonlabs.com/u/mjw)\ **Post date:** [May 8, 2026, 5:43pm UTC](https://community.roonlabs.com/t/networkerror-502-and-504-with-upnp-configuration-issues-ref-36o1w2/319763/10 "2026-05-08T17:43:07Z")
Have you reinstalled ARC since moving to your Mac? If not, remove, and reinstall. Unfortunately, you will loose any download on the phone. ---
**Author:** ![Chrislayeruk](https://community.roonlabs.com/user_avatar/community.roonlabs.com/chrislayeruk/32/47983_2.png) [@Chrislayeruk](https://community.roonlabs.com/u/Chrislayeruk)\ **Post date:** [May 9, 2026, 6:28am UTC](https://community.roonlabs.com/t/networkerror-502-and-504-with-upnp-configuration-issues-ref-36o1w2/319763/11 "2026-05-09T06:28:32Z")
Bingo, that’s fixed it… Thank you so much for your assistance, it is really appreciated. I now have my Roon library back and working better than ever, along with ARC. For me it’s been a journey but I have learned a lot on the way… Cheers, Chris ---
**Author:** ![system](https://roon-community-uploads.s3.amazonaws.com/original/3X/d/e/deefbd9083c99c82bbf2dd3f873f52a49f5db881.png) [@system](https://community.roonlabs.com/u/system)\ **Post date:** [May 10, 2026, 6:29pm UTC](https://community.roonlabs.com/t/networkerror-502-and-504-with-upnp-configuration-issues-ref-36o1w2/319763/12 "2026-05-10T18:29:32Z")
This topic was automatically closed 36 hours after the last reply. New replies are no longer allowed.