I am looking to host my own DNS due to some recent events concerning email delivery. However, before I buy a server and begin configuring I wanted to know if there are any special "gotchas" that exist with the 515E and DNS Hosting.
Also, are there any special commands I need to be aware of to enter on the PIX in order for it to properly pass the UDP traffic.
Well, I am no where close to a CCIE in knowledge, but I do know that if you decide to host your DNS using a Windows 2003 box, that you need to make sure that you issue the command:
fixup protocol dns max-length 2048
Windows 2003 doesn't do DNS totally correct and the PIX fixup protocol expects the requests and responses to be rfc compliant. AS such, it expects the request to be no more than 512bytes. Well Microsoft doesn't do rfc compliant all the time, and Windows 2003 will go beyond 512. So, make sure you add the max length to account for the incorrect MS issue.
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We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
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