DCC broken?

Brian K. West brian@bkw.org
Tue May 27 03:06:18 UTC 2003

I have this in my cisco acl's

(Added range to test it.. added tcp also to make sure I wasn't crazy.)

access-list 101 permit udp any host range 6000 6300
access-list 101 permit tcp any host range 6000 6300

outbound acl is:

access-list 102 deny   ip any log
access-list 102 deny   ip any log
access-list 102 deny   ip any log
access-list 102 permit ip any
access-list 102 deny   ip any any log

I haven't changed anything and it started doing this.. wasn't sure what was


-----Original Message-----
From: dcc-admin@rhyolite.com [mailto:dcc-admin@rhyolite.com] On Behalf Of
Vernon Schryver
Sent: Monday, May 26, 2003 9:38 PM
To: dcc@calcite.rhyolite.com
Subject: RE: DCC broken?

> From: "Brian K. West" <brian@bkw.org>

> Installed on a friends server on a totally different network and it
> are the public servers blocking me?

> > I have been using DCC for the past few weeks now on my personal mail
> > but now it seems to be broken... I can't find an answer in the faq or in
> > google groups that has this error
> >
> > badly signed NOP response from dcc.dcc-servers.net
> >
> > Anyone else see this.. I have double checked to make sure UDP ports are
> > and it still does it.

The DCC clients that were blacklisted on the 3 DCC servers I can see
have been quiet for several days.  One was sending perhaps 50,000
requests/day with an RFC 1918 source address of
Another appeared to be one of the broken so called "ports" of the DCC
client code.

Besides, the results of blacklisting by DCC servers is silence, not
complaints about bad digital signatures.

Do you have a NAT box that is rewriting DCC/UDP/IP packets?

Vernon Schryver    vjs@rhyolite.com
DCC mailing list      DCC@rhyolite.com

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