Re: nntp problems with hibernating and waking up in a new network

["Bjørn Mork" <bmork@dod.no>]

Steinar Bang <sb@dod.no> writes:

> When I hibernate at home and wake the laptop up in the work network,
> or hibernate at work and wake up the laptop at home, and then try to
> read mail and news, my nnimap servers work fine.  But the nntp groups
> are unable to connect to the servers.  According to ethereal, no
> actual nntp traffic takes place.  This is the case with both agentized
> and direct nntp servers.

The main problem when doing this is that emacs (or libc?) will cache
DNS resolvers for you, and these probably won't work in your new
network environment.  Therefore there is no nntp traffic, only
unanswered DNS queries.

Can't explain why the nnimap sessions work.  Maybe they are using some
external process to set up the connection, e.g a ssh tunnel?

Never found a good solution to the cached DNS resolver problem.  Note
that is isn't confined to emacs.  The same problem applies to most
applications running forever without mechanisms for reloading
/etc/resolv.conf, like most browsers.  

Personally I resorted to running BIND locally on the laptop...


Bjørn
-- 
Let me tell you something, you wimp, you hope that the Earth is flat.