DNS TCP test

tvanscot · Post by **tvanscot** » Thu Jun 29, 2006 8:08 am

HI,

I am trying to do a DNS test, if I setup a DNS test using UDP on port 53 it works. If I try to do a DNS test using TCP on port 53 it times out.

I do believe that the DNS servers are responding to TCP requests. I verfied this by using dnsstuff.com's dns report function and I also used nslookup (using a the "set vc") from the same system that host monitor is installed on.

I am using version 3.71

Thanks for any help.

KS-Soft · Post by **KS-Soft** » Thu Jun 29, 2006 10:53 am

May we access your DNS server for testing?

Regards
Alex

tvanscot · Post by **tvanscot** » Thu Jun 29, 2006 10:58 am

Sure, they are:

ns3.paychex.com
ns4.paychex.com
ns5.paychex.com
ns6.paychex.com

KS-Soft · Post by **KS-Soft** » Thu Jun 29, 2006 7:56 pm

As I see DNS server accepts TCP connection but it does not respond to DNS query. HostMonitor connects to the server, sends request but does not receive any reply.
http://www.dnsreport.com/tools/dnsrepor ... aychex.com checks for TCP connection that works fine but it does not check for DNS reply.
I am not sure how exacly works "nslookup -set vc"

Regards
Alex