<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:12pt"><div>If the DNS server now has a RFC1918 IP address, then one will probably have to setup appropriate NAT rules for a publicly accessible/routable IP address.<br>On some firewalls, there is a NAT rule for incoming traffic and a another rule for outgoing traffic (basically mapping the public IP for both incoming/outgoing).<br><br>Sounds like this was done, so perhaps double check both incoming and outgoing rules and setup?<br>Maybe something missed with the IP config (gateway, mask, broadcast)?<br>Can the DNS server ping or traceroute to any public sites?<br><br>HTH<br><br></div><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><font face="Tahoma" size="2"><hr size="1"><b><span
style="font-weight: bold;">From:</span></b> Peter Macko <peter_macko@yahoo.com><br><b><span style="font-weight: bold;">To:</span></b> bind-users@lists.isc.org<br><b><span style="font-weight: bold;">Sent:</span></b> Monday, July 27, 2009 2:00:24 PM<br><b><span style="font-weight: bold;">Subject:</span></b> bind9 behind firewall stopped responding<br></font><br><div style="font-family: Courier New,courier,monaco,monospace,sans-serif; font-size: 12pt;"><div>I have a master DNS (bind9) for a domain. It was working until I put it behind firewall on a DMZ private subnet. It is setup in the way that from internet the DNS maintains its original IP address, that is SAT translated by firewall to the DMZ private subnet. I allowed ports 53 TCP/UDP. Should I allow other ports? The IP address of the DNS server was changed by putting it on DMZ private subnet, could be this the problem? Any ideas?</div>
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<div>For testing, I have used some free dns report webpage, ... it is saying that my DNS is not responding.</div>
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<div>Maybe I am asking something obvious, but I have to solve this until tommorow and I do not know where to start looking.</div>
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<div>Than you a lot,</div>
<div>Peter</div></div><br>
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