UNIX for Dummies Questions & Answers

Hi Guys,

Just wanted to seek your assistance on an issue encountered with one of our client DNS server query. we have 2 sets of DNS servers.. internal and external. For Internal to reach the external DNS server (DMZ) it has to go through 2 FWs.

Current settings:
Issue:
Not sure where else to check.. any help on this is appreciated as Services on the windows server is active/listening. FW ports and routes are present.

thank you!

You should remove all firewall rules and apply your rules step-by-step, testing along the way in a controlled manner.

The best way to solve this problem is to simply remove all the FW rules. Then apply your set of rules, step-by-step, testing along they way.

In that manner, you will easily and quickly find both the problem and the solution to your problem.

Thanks Neo,

But I don't think I can do that though. The weird part there is that both the Internal DNS servers 1 and 2 are on the same segment and External DNS Servers are on the same segment as well. One FW rule was used for the both the FWs (whole subnet). and Internal DNS 1 works for both External DNS whilst the other Indternal DNS 2 is having issues.

anything I can check on the External DNS 2 unix files?

thank you!

---------- Post updated at 03:33 PM ---------- Previous update was at 03:32 PM ----------

Am not a unix person so not sure what to check on the system.. any help is greatly appreciated.

You need to have a meeting with the admins of those systems and formulate a plan. If you are not in a position to turn off the rule sets that effect your DNS configuration, then you are unlikely to be in a position to solve the problem.

This is especially true if "you are not a unix person" as you mention.

Take this issue to your system administrator. That is their job.