Comcast blocking Plex? Probably not…

April 13, 2015 at 7:56 pm Leave a comment

Last summer I used Plex quite extensively.  I took my daughters to swimming practice and instead of driving home, waiting 30 minutes, then driving back to get them, I decided to simply stay there and watch something via Plex on my iPhone while I waited.

Since then, I’ve only used Plex occasionally from outside the home.  Some months ago, I noticed that Plex stopped working when I wasn’t at home.  I briefly looked at it but not too closely.

I decided to dig into it tonight to try to figure out what was going on.

To test, I turned Wifi off on my iPhone and attempted to connect to Plex via LTE.  No dice.  In Plex, I went to Settings > Server > Remote Access.  It complained that Plex was unreachable from the outside.  I noticed that my firewall logs did not show any connection attempts against port 32400, the Plex default.  Interesting.  After trying a few things, I decided to try a different port.  So, I changed the Plex service object (TCP Port 32400) on my Firewall to TCP Port 34200, ensuring the NAT rule still pointed to port 32400 on my Plex machine, and updated the TCP Port setting in Plex.  Within a few moments, it showed “Fully accessible outside your network”.  I validated that I could connect from my iPhone.  Worked great.  In my firewall logs?  Yep, I’m getting hits on 34200 now.

So, is Comcast blocking Plex in NE Florida?  (*GASP*)

I’m leaning toward user error on my part (even though I don’t see an error, and it was working at one point…)

Anyhow, I’m working now…  If I suddenly can’t connect on this new port in a few weeks, I’ll revisit my theory…

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Entry filed under: iPhone, Mac, Networking. Tags: , .

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