W dniu 2014-05-07 21:03, Scott Kitterman napisał(a):
On Wednesday, May 07, 2014 20:25:58 s...@spam.charonski.pl wrote:
# dpkg -l | grep python-dns
ii python-dns 2.3.6-1+deb7u1
all DNS client module for Python
I've checked /usr/lib/python2.7/dist-packages/DNS/Base.py and patch
for
that earlier DNS bug (#718547) is applied.
I did investigate this and found that the default timeouts in
python-spf and
python-dns are rather long. With a series of non-responsive DNS
servers as in
the bug, it can take a very long time to get a result, but one does
return.
I agree it's a bug, but not a grave one. Python-spf 2.0.9 that's in
jessie
will default to a shorter period. I do plan to backport that, which
will
help. I will also, in a future release, add a configuration option
of the
policy server so you can adjust the timeout.
Scott K
The problem may not be timeouts, but some bug by which python-dns can't
resolve correctly got DNS answer. The servers, I attached, work (at last
checking with dig/host). Maybe some DNS record needed by SPF is filtered
by them and it's the cause? I think it freezes, because DNS server
returns some incomplete answer and python-dns can't handle it and wait
on timeout, but I didn't check it with any sniffer.
However, shorter timeouts should be good workaround.
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