Results 1 to 12 of 12

Thread: Throttled OpenVPN connection

  1. #1
    Join Date
    Jul 2013
    Location
    San Antonio, TX
    Posts
    3,145
    Carrier(s)
    T-Mobile
    Feedback Score
    0
    vBActivity - Stats
    vBActivity - Bars

    Throttled OpenVPN connection

    On my Galaxy S10, connecting to my home VPN (via OpenVPN over TCP) results in sub-par speeds. I'm getting less than 3Mbps down when it should be closer to 9. If I connect to Wi-Fi (away from home, obviously) plus the VPN, speeds are what they should be.

    Non-VPN (so just the 4G connection) speeds are way higher, leading me to believe that T-Mobile is throttling my OpenVPN connection. I've yet to hit 50GB of usage, so I don't believe anything is being deprioritized.

    What gives?
    - Galaxy S10 (T-Mobile / 128GB / Black)
    Twitter | Homepage

  2. #2
    Join Date
    Jul 2002
    Location
    Gulf Coast
    Posts
    15,593
    Device(s)
    Moto G7 Power, Nexus 5X
    Carrier(s)
    T-Mobile, PagePlus
    Feedback Score
    0
    vBActivity - Stats
    vBActivity - Bars
    Quote Originally Posted by besweeet View Post
    What gives?
    Can you configure OpenVPN to run on a non-standard port?
    Donald Newcomb

  3. #3
    Join Date
    Jul 2013
    Location
    San Antonio, TX
    Posts
    3,145
    Carrier(s)
    T-Mobile
    Feedback Score
    0
    vBActivity - Stats
    vBActivity - Bars
    Quote Originally Posted by DRNewcomb View Post
    Can you configure OpenVPN to run on a non-standard port?
    It currently is using a non-standard port (I believe it used 1194 by default, but my current one is much higher).

  4. #4
    Join Date
    Jul 2002
    Location
    Gulf Coast
    Posts
    15,593
    Device(s)
    Moto G7 Power, Nexus 5X
    Carrier(s)
    T-Mobile, PagePlus
    Feedback Score
    0
    vBActivity - Stats
    vBActivity - Bars
    Quote Originally Posted by besweeet View Post
    It currently is using a non-standard port (I believe it used 1194 by default, but my current one is much higher).
    Hmmm? What happens if you use port 443? (Assuming you're not running a HTTPS server at home?

  5. #5
    Join Date
    Jul 2013
    Location
    San Antonio, TX
    Posts
    3,145
    Carrier(s)
    T-Mobile
    Feedback Score
    0
    vBActivity - Stats
    vBActivity - Bars
    Quote Originally Posted by DRNewcomb View Post
    Hmmm? What happens if you use port 443? (Assuming you're not running a HTTPS server at home?
    I'm slightly hesitant to test that. Are there any open holes to be concerned about if using a known port like that?

  6. #6
    Join Date
    Jul 2002
    Location
    Gulf Coast
    Posts
    15,593
    Device(s)
    Moto G7 Power, Nexus 5X
    Carrier(s)
    T-Mobile, PagePlus
    Feedback Score
    0
    vBActivity - Stats
    vBActivity - Bars
    Quote Originally Posted by besweeet View Post
    I'm slightly hesitant to test that. Are there any open holes to be concerned about if using a known port like that?
    Well, it's just for long enough to run a test to see if the speed changes. I'm just suggesting that T-Mobile may handle connections on different ports differently.

  7. #7
    Join Date
    Jul 2013
    Location
    San Antonio, TX
    Posts
    3,145
    Carrier(s)
    T-Mobile
    Feedback Score
    0
    vBActivity - Stats
    vBActivity - Bars
    Quote Originally Posted by DRNewcomb View Post
    Well, it's just for long enough to run a test to see if the speed changes. I'm just suggesting that T-Mobile may handle connections on different ports differently.
    My router says that port 443 is in use elsewhere (not sure where). I'll try a different one altogether.

    Update: Tried port 443 for both UDP and TCP. Connected to both but speeds are still lower than they should be. Speeds are capped at 3Mbps when on LTE. My non-VPN speeds over LTE are around 120 down and 10 up, so it's obviously not the data connection either...

    This didn't start happening until I replaced my S7 with the S10. Is it possible the S10 is using the tethering APN when using a VPN? I don't know if that's plausible because, if it was the case, I'd expect speeds go be capped at 0.5 down and up (standard ONE plan).

  8. #8
    Join Date
    Jul 2002
    Location
    Gulf Coast
    Posts
    15,593
    Device(s)
    Moto G7 Power, Nexus 5X
    Carrier(s)
    T-Mobile, PagePlus
    Feedback Score
    0
    vBActivity - Stats
    vBActivity - Bars
    Quote Originally Posted by besweeet View Post
    ....This didn't start happening until I replaced my S7 with the S10. Is it possible the S10 is using the tethering APN when using a VPN? I don't know if that's plausible because, if it was the case, I'd expect speeds go be capped at 0.5 down and up (standard ONE plan).
    Who knows what tweeks T-Mobile has added to the firmware of their branded devices to spoil the fun of folks like us? This is one reason I tend to buy unflagged phones.

  9. #9
    Join Date
    Jul 2013
    Location
    San Antonio, TX
    Posts
    3,145
    Carrier(s)
    T-Mobile
    Feedback Score
    0
    vBActivity - Stats
    vBActivity - Bars
    I think I'll do some testing with a few other phones:
    - T-Mo S9+
    - T-Mo J7
    - Unlocked Moto G5+

    More to come...

  10. #10
    Join Date
    Jul 2019
    Posts
    23
    Feedback Score
    0
    vBActivity - Stats
    vBActivity - Bars
    Does it matter which connection protocol he uses?

  11. #11
    Join Date
    Jul 2013
    Location
    San Antonio, TX
    Posts
    3,145
    Carrier(s)
    T-Mobile
    Feedback Score
    0
    vBActivity - Stats
    vBActivity - Bars
    Quote Originally Posted by RobbieL241 View Post
    Does it matter which connection protocol he uses?
    I was able to get UDP working and the speeds are the same there when connected over LTE.

  12. #12
    Join Date
    Jul 2002
    Location
    Gulf Coast
    Posts
    15,593
    Device(s)
    Moto G7 Power, Nexus 5X
    Carrier(s)
    T-Mobile, PagePlus
    Feedback Score
    0
    vBActivity - Stats
    vBActivity - Bars
    Quote Originally Posted by RobbieL241 View Post
    Does it matter which connection protocol he uses?
    TAP v TUN or TCP vs UDP? To connect with OpenVPN on my phone I have to use TUN. TAP doesn't work (YMMV).

Similar Threads

  1. Replies: 3
    Last Post: 11-23-2015, 09:59 AM
  2. Replies: 2
    Last Post: 11-24-2013, 01:21 PM
  3. Replies: 9
    Last Post: 01-10-2012, 09:04 PM
  4. Is Clearwire throttling connections?
    By xchpstang in forum Clearwire
    Replies: 29
    Last Post: 06-26-2011, 12:38 PM
  5. Replies: 10
    Last Post: 05-31-2008, 12:39 AM

Tags for this Thread

Bookmarks