Bug#692025: linux: internet connection refused after new route

[Jonathan Nieder <jrnieder@gmail.com>]

Hi Patrik,

Ben Hutchings wrote:
> On Thu, 2012-11-01 at 13:58 +0100, Patrik Nilsson wrote:

>> I suspect this bug is when a task (i.e. ntp, virus updater, ...) tries
>> to connect to the Internet through a socket using the first interface,
>> holds it open, the kernel won't reroute to the new one and you need try
>> to again.
[...]
>> Example: When one wlan connection is up and you try to connect throught an
>> other one, you need to retry.
>>
>> I have tested both examples with lftp trying to connect to an IP-address
>> and you cant' connect as long as lftp's socket is in effect.
>
> Please explain in more detail what you're doing:
> - All the commands you run to reconfigure and use the network
> - The routing table (as shown by 'ip r') after each reconfiguration

I suspect there was a miscommunication here: if I understand
correctly, Ben was looking for a simple sequence of steps and, for
each step, a routing table from after that step.  This would help him
to understand what was happening when you ran into this problem.
Perhaps he could run similar steps in a similar setup and compare, to
track down where the problem lies.

See http://www.chiark.greenend.org.uk/~sgtatham/bugs.html for more
context.

Thanks for your patience, and hope that helps.
Jonathan