[ubuntu-uk] (UK) Virginmedia mobile internet- Troubles with yahoo and google sign in using Virginmedia mobile internet dongle

[Jonathon Fernyhough]

2009/11/27 alan c <aeclist at candt.waitrose.com>:
> Jonathon Fernyhough wrote:
>> 2009/11/26 alan c <aeclist at candt.waitrose.com>:
>>> (also to ubuntu forum)
>>>
>>> Is anyone in UK using Virginmedia mobile internet dongle and yahoo or
>>> google accounts?
>>> I would be most interested to know if you see the following problems
>>> too. tia.
>>>
>>> Workaround - please see below.
>>>
>>
>> Have you tried lowering the MTU? This fixes problems on certain sites
>> for me quite often.
>>
>> e.g..:
>> $ sudo ifconfig ppp0 mtu 1400
>>
>
> thanks
>
> what does mtu stand for?
>
> also, I am not at all clear about how ppp0 is involved with a mobile
> internet dongle, the machine (ppp0??) is self configuring for the
> dongle. This of course may be part of the problem.
> tia
> --
> alan cocks
> Ubuntu user
>
> --
> ubuntu-uk at lists.ubuntu.com
> https://lists.ubuntu.com/mailman/listinfo/ubuntu-uk
> https://wiki.ubuntu.com/UKTeam/
>

MTU = Maximum Transmissible Unit.

I'm not sure of the specifics, but it's something like: if this is set
too high the connection can't be made as the packet can't be
transmitted (though in theory it should just get fragmented). It may
be that certain web servers/routers can't handle a fragmented packet
(or it's set to deny/drop them).

ppp0 should be the connection set up to Vodafone - using
NetworkManager with my 3 dongle ppp0 appears when I connect to the
mobile network.

Jonathon