DNS Problem

[Rotty]

Hi,
I have a problem with DNS.
Test 1:
When i execute: nslookup mydomain.com the server respond, but when i execute: google.com server respond ;; connection timed out; no servers could be reached.
Test 2:
Whe i send a mail with user in the same domain (mydomain.com), ISPConfig send email ok.But when i send with user resgiter in ISPConfig for (example) user@gmail.com the server not send email.The log of mail.log say this: type MX: Host not found,try again.

Somebody knows that it happens?.

[martinfst]

Looks like you have not set your DNS forwarders. Which means you have a local DNS server that does not look at upstream DNS servers when required. Depends a bit on how you have setup your server, but adding options {
forwarders {
IP address1 of DNS server of your ISP;
IP address2 of DNS server of your ISP;
};
might help. Beware, there are multiple locations you can put these lines (I've put them in /etc/bind/named.conf.options) and there are alternative soltutions also. You need to test. Try to get the nslookup google.com to work before trying to solve your mail problems.

[Rotty]

Thanks to respond to me,
I have done what you said to me, I´ve including the forwarders into named.conf.local, then i reboot the server.
When server boot again i did this: nslookup google.com and i obtain the same message connection timed out; no servers could be reached.

This is my configuration:
/etc/resolv.conf:
nameserver 192.168.0.5 << The IP of ISPConfig
/etc/network/interface
gateway 192.168.0.1 << IP of Gateway

[martinfst]

There's no need to reboot a *nix server when you change options or even when you install a new or updated program. A restart of that specific program will do. To restart the name server /etc/init.d/bind restart.
Look in the log files to see if you have some errors. Log files can be found in /var/log. It depends a bit which distribution you use where to look. For Ubuntu it's /var/log/daemon, but /var/log/messages could also contain error messages. I assume you have entered the real IP numbers of your ISP's DNS servers.

[Rotty]

Ok, i install webmin in ISPConfig.
I configure in Servers > DNS BIND Server the fordwars to DNS-Servers.
Now i can send a icmp-packet (ping) and resolv it.But the problem is the following one:
The Mail.log say this:
connect to gmail-smtp-in.l.google.com[66.249.93.27]: Connection timed out (port 25)
What happend?.

[falko]

Please check if your server is blacklisted: http://www.mxtoolbox.com/blacklists.aspx