Am 13.06.2014 12:09, schrieb Nick Edwards: > On 6/11/14, Jost Krieger <jost.krieger+dove...@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-isr/index.html 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
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