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From: "M. Dietrich" <mdt@emdete.de>
To: John <graysky@archlinux.us>, wireguard@lists.zx2c4.com
Subject: Re: Traffic on port 53 fails on LTE but works on WiFi
Date: Mon, 19 Nov 2018 08:32:08 +0100	[thread overview]
Message-ID: <1542611942.d09p50zvb2.astroid@morple.none> (raw)
In-Reply-To: <CAO_nJAZRTXB424FKTew726LUieeAtpj1crXucf2deoQXVyw__w@mail.gmail.com>


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Hi John,

Quotation from John at November 18, 2018 19:55:
> ... on port 53 ... do _not_ work when I connect via LTE
> (Verizon supplying the data).  On LTE, I am no longer able
> to transfer data to/from the server peer but I can handshake
> with it.

Vodafone blocks UDP traffic on port 53 in LTE.

> 1) What can I try on the server peer side to diagnose?

I would check with tcpdump. it seems Verizon does some package
inspection, maybe reducing MTU will do?

> 2) Do people feel that Verizon is actively blocking the
> connection on port 53?

Not with Verizon but Vodafone which does a complete block -
not even the handshake goes through. Not sure about the cause
for that, maybe they want to control your DNS that way.

Regards,
M. Dietrich

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  parent reply	other threads:[~2018-11-19  7:32 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-18 18:55 Traffic on port 53 fails on LTE but works on WiFi John
2018-11-19  4:26 ` Quan Zhou
2018-11-19  7:32 ` M. Dietrich [this message]
2018-11-19  8:40   ` John
2018-11-19  8:54   ` Matthias Urlichs
2018-11-19 16:02     ` Roman Mamedov
2018-11-19  9:57 ` Problem to load wireguard LKM in Archlinux Tosh
2018-11-19 15:04   ` John
  -- strict thread matches above, loose matches on Subject: below --
2018-11-19 15:25 Traffic on port 53 fails on LTE but works on WiFi Jacob Schooley
2018-11-19 20:24 ` John

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