[Pdns-users] Sourceforge DNS issues

[Stephane Bortzmeyer]

[It *seems* that the name servers are PowerDNS machines, hence the
message.]

Sourceforge currently experiences DNS problems (they claim it is a
DoS, http://sourceforge.net/docs/A04). Names like
echoping.svn.sourceforge.net cannot be resolved from most sites
(server failure, while you would expect a timeout, from a typical
DoS).

The behaviour of the authoritative name servers is very funny: they
send (immediately) an empty reply, with TC bit set. So, dig retries
with TCP:

% dig @pdns2.ostg.com. A echoping.svn.sourceforge.net
;; Truncated, retrying in TCP mode.

; <<>> DiG 9.3.4 <<>> @pdns2.ostg.com. A echoping.svn.sourceforge.net
; (1 server found)
;; global options:  printcmd
;; connection timed out; no servers could be reached

(The server does not accept TCP, it seems.)

>From sites where it works, one can see that the response is very
small, there is no need to set the TC bit!

Any idea?