# Plexamp fails to connect on cellular network **URL:** \ **Category:** Remote Access\ **Tags:** server-synology, plexamp\ **Created:** [July 16, 2026, 5:58pm UTC](https://forums.plex.tv/t/plexamp-fails-to-connect-on-cellular-network/940696 "2026-07-16T17:58:18Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![andykelly](https://avatars.discourse-cdn.com/v4/letter/a/f19dbf/32.png) [@andykelly](https://forums.plex.tv/u/andykelly)\ **Post date:** [July 16, 2026, 5:58pm UTC](https://forums.plex.tv/t/plexamp-fails-to-connect-on-cellular-network/940696/1 "2026-07-16T17:58:18Z")
Server Version#: 1.43.3.10828 Player Version#: Plexamp iOS v4.12.4 Plexamp iOS app is unable to connect to the server when using cellular data. It is able to connect fine via Wi-Fi, Wi-Fi w/ VPN, and cellular data w/ VPN. The regular Plex app has no problem connecting via cellular. I also used had this problem when I tried the Plex Dash app a while ago and just gave up trying to use the Dash app. The server is running on Synology through a reverse proxy with the custom server access URL set but remote access disabled in the server settings as I only want to be able to access this through the reverse proxy. [Plexamp logs](https://forums.plex.tv/t/plexamp-debug-logs-how-to-extract-them/753427) and regular Plex app logs provided. [com.plexapp.plex 2026-07-16–17-41-04-365.log](https://forums.plex.tv/uploads/short-url/cbubg1hk1pKSPJWLHluvKIHZplt.log) (15.2 KB) [Plexamp.log](https://forums.plex.tv/uploads/short-url/1sPbYxJBwiJ0NIEW1adaX1S1U4H.log) (192.1 KB) ---
**Author:** ![elan](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/elan/32/5_2.png) [@elan](https://forums.plex.tv/u/elan)\ **Post date:** [July 16, 2026, 6:34pm UTC](https://forums.plex.tv/t/plexamp-fails-to-connect-on-cellular-network/940696/2 "2026-07-16T18:34:08Z")
```auto Jul 16, 2026 13:25:49.152 [Javascript] WARNING - DEVICE: Server connection https://plex.ndlx.ca:443 didn't work for Saturn: HTTP status -35 ``` It can’t reach your server. **CURLE\_SSL\_CONNECT\_ERROR (35)** A problem occurred somewhere in the SSL/TLS handshake. You really want the error buffer and read the message there as it pinpoints the problem slightly more. Could be certificates (file formats, paths, permissions), passwords, and others ---
**Author:** ![andykelly](https://avatars.discourse-cdn.com/v4/letter/a/f19dbf/32.png) [@andykelly](https://forums.plex.tv/u/andykelly)\ **Post date:** [July 16, 2026, 6:40pm UTC](https://forums.plex.tv/t/plexamp-fails-to-connect-on-cellular-network/940696/3 "2026-07-16T18:40:29Z")
So why would this be an issue that only occurs on a cellular data connection, and only with Plexamp and Plex Dash? It’s perfectly able to communicate with my server otherwise, and the Plex app connects fine over cellular. ---
**Author:** ![elan](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/elan/32/5_2.png) [@elan](https://forums.plex.tv/u/elan)\ **Post date:** [July 16, 2026, 8:45pm UTC](https://forums.plex.tv/t/plexamp-fails-to-connect-on-cellular-network/940696/4 "2026-07-16T20:45:22Z")
I don’t have an answer for you, perhaps Plex is connecting over a relay or something. Maybe something is sitting between Plexamp and the server with strict/different TLS requirements. ---
**Author:** ![andykelly](https://avatars.discourse-cdn.com/v4/letter/a/f19dbf/32.png) [@andykelly](https://forums.plex.tv/u/andykelly)\ **Post date:** [July 16, 2026, 8:52pm UTC](https://forums.plex.tv/t/plexamp-fails-to-connect-on-cellular-network/940696/5 "2026-07-16T20:52:07Z")
Relay is disabled on the server. The Plex app is able to connect and play media via cellular data, the browser is able to connect and play media via cellular data (both movies/tv and music), Plexamp is unable to connect which in my mind indicates an issue with the Plexamp app and the way it’s handling the cellular connection. ---
**Author:** ![elan](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/elan/32/5_2.png) [@elan](https://forums.plex.tv/u/elan)\ **Post date:** [July 16, 2026, 9:12pm UTC](https://forums.plex.tv/t/plexamp-fails-to-connect-on-cellular-network/940696/6 "2026-07-16T21:12:58Z")
Who is terminating SSL? ---
**Author:** ![andykelly](https://avatars.discourse-cdn.com/v4/letter/a/f19dbf/32.png) [@andykelly](https://forums.plex.tv/u/andykelly)\ **Post date:** [July 16, 2026, 9:24pm UTC](https://forums.plex.tv/t/plexamp-fails-to-connect-on-cellular-network/940696/7 "2026-07-16T21:24:22Z")
I’m not sure what you mean? The Synology is running a reverse proxy on port 443 with a certificate from Lets Encrypt. Plexamp is able to connect to it with no problem when I’m on wifi or using a VPN on the cellular connection. It only has an issue when connecting purely on the celluar data. ---
**Author:** ![elan](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/elan/32/5_2.png) [@elan](https://forums.plex.tv/u/elan)\ **Post date:** [July 16, 2026, 9:38pm UTC](https://forums.plex.tv/t/plexamp-fails-to-connect-on-cellular-network/940696/8 "2026-07-16T21:38:10Z")
Reverse proxy means it’s terminating the SSL connection. For some reason it and Plexamp don’t agree. Not sure why. ---
**Author:** ![andykelly](https://avatars.discourse-cdn.com/v4/letter/a/f19dbf/32.png) [@andykelly](https://forums.plex.tv/u/andykelly)\ **Post date:** [July 17, 2026, 4:21am UTC](https://forums.plex.tv/t/plexamp-fails-to-connect-on-cellular-network/940696/9 "2026-07-17T04:21:36Z")
Yeah I’m not sure what’s going on with Plexamp. The regular Plex app connects fine to the reverse proxy domain: ```auto [Connections] Testing connection for Saturn at https://192-168-2-19.722aee565fa048de98228e11eeff3a7c.plex.direct:32400 [Connections] Testing connection for Saturn at https://plex.ndlx.ca:443 [Connections] GET 200 https://plex.ndlx.ca:443/media/providers 180ms [Connections] Current best connection to Saturn is https://plex.ndlx.ca:443 ``` But Plexamp is actually failing to connect to that domain even when using my local network (which has the domain pointed to the local IP of the machine) and falls back to using the plex.direct URL. Don’t know if this is relevant, but Plexamp is also receiving a 404 error every time it tries to connect to [plex.tv](http://plex.tv): ```auto Jul 17, 2026 00:34:21.197 [0x6c633000] DEBUG - Networking: Completed request 289: (GET https://plex.tv/api/v2/user/settings?uuid=ce17cee8e896cb60&key=RecentPlays&cacheBuster=1784262861132) with code 404 (have 105 bytes) in 48 ms. ``` ---
**Author:** ![hellomello13](https://avatars.discourse-cdn.com/v4/letter/h/46a35a/32.png) [@hellomello13](https://forums.plex.tv/u/hellomello13)\ **Post date:** [August 16, 2026, 5:42am UTC](https://forums.plex.tv/t/plexamp-fails-to-connect-on-cellular-network/940696/10 "2026-08-16T05:42:45Z")
Same failure here, with a slightly different error code — adding data in case it helps narrow it down. **Setup:** Plexamp iOS 4.12.4, PMS 1.43.3.10828 (same server build as OP). Plex connects directly, no reverse proxy in front of it. **Symptom:** identical pattern — fine on WiFi, fine on WiFi+VPN, dead on cellular alone. My error is `-28` (`CURLE_OPERATION_TIMEDOUT`) rather than OP’s `-35`. What I think is the useful part: Plexamp’s own logs show it trying all 4 published connections (LAN, IPv6, public, relay) and every one timing out at the timeout — 15.00 s direct, 25.00 s relay. The same app successfully reached [plex.tv](http://plex.tv), [sonos.plex.tv](http://sonos.plex.tv) and [itunes.apple.com](http://itunes.apple.com) on 443, each returning 200 in 400–800 ms. So the app has working network; it is specifically the connections to the server that hang. I also confirmed the server is reachable on that same cellular connection: mobile Safari loads `/identity` over cellular fine, and Plex for iOS connects and browses normally. Only Plexamp fails. Server-side logs show those requests arriving, so nothing is being dropped before it reaches the origin. _ **Disclaimer:** the following is speculative AI analysis of the issue based on my iOS [Plexamp logs](https://forums.plex.tv/t/plexamp-debug-logs-how-to-extract-them/753427) and my plex server configuration. But I hope it could be helpful for developers investigating the matter._ My carrier is IPv6-only with 464XLAT/NAT64 (T-Mobile US). Plexamp bundles its own libcurl (7.74.0, per its log) while Safari and the main Plex app use Apple’s URLSession — and Apple documents that apps which bypass the system resolver or use IPv4 literals fail specifically on DNS64/NAT64 networks. That would explain why only Plexamp is affected, and why a VPN fixes it. **Are others hitting this also on IPv6-only carriers?** Worth checking, since it would be an easy pattern to miss. Worth noting it doesn’t look like simple carrier port-blocking either — there are two other threads where this happens _inside_ a Tailscale tunnel, with a direct connection and healthy RTT, where the carrier can’t see the port at all: - /t/plexamp-works-on-wifi-via-tailscale-but-not-on-cellular/938958 - /t/plexamp-ios-times-out-28-on-cellular-over-tailscale-safari-succeeds-at-same-url/939215