Am 13.06.2014 12:09, schrieb Nick Edwards:
On 6/11/14, Jost Krieger <Jost.Krieger+dovecot@rub.de> wrote:
On Wed Jun 11 12:03:24 2014, Reindl Harald wrote:
Cisco routers by default mangle DNS traffic, break zone transfers or even put befor all CNAME blocks a $TTL 0 line never appeared on the master until you disable DNS ALG for UDP and TCP
I believe that Cisco equipment will do such things, but I doubt it's the routers. Unless you plug a firewall card in.
think he means junk like PIX, I've never seen a 7200, 7300, 10K, or any ASR do that
http://www.2mul.com/c/en/us/products/routers/2921-integrated-services-router...
and even the small Cisco 6 years ago supplied by our ISP did the same - most likely you just don't realize it if you are not hoster of public nameservers and have one of them in front of and one behind the NAT