Hi there,
since some days I have an issue with my 2901 router: I can't reach my DNS server from an external network. My router listen on two public IP and from the first I can reach DNS, but not from the second.
The last test I did it had been set same static rule for both IP:
ip nat inside source static tcp 10.39.5.2 53 xxx.xxx.xxx.130 53 extendable
ip nat inside source static tcp 10.39.5.2 53 xxx.xxx.xxx.131 53 extendable
And the results are these:
$ telnet XXX.XXX.XXX.130 53
Trying XXX.XXX.XXX.130...
Connected to XXX.XXX.XXX.130.
Escape character is '^]'.
$ telnet 46.235.141.131 53
Trying 46.235.141.131...
Connected to 46.235.141.131.
Escape character is '^]'.
$ nslookup mail.xxxxxxx.it XXX.XXX.XXX.131
Server: XXX.XXX.XXX.131
Address: XXX.XXX.XXX.131#53
Name: mail.xxxxxxx.it
Address: XXX.XXX.XXX.131
Name: mail.xxxxxxx.it
Address: XXX.XXX.XXX.131
$ nslookup mail.xxxxxxx.it XXX.XXX.XXX.130
;; connection timed out; trying next origin
;; connection timed out; no servers could be reached
Even with a different IP address for 130 DNS do not change the situation.
Do anyone have idea of causes of this strange behaviour?
Thanks in advance.
Ale