Firewall Ports

fjalcroft · 02-17-2009, 10:39 AM

Hi

I am having a problem with two servers which are situated in a data centre. One server (S1) is our physical server in a rack. We have recently rented a virtual server (S2) from the data centre.

Due to the configuration on the network, these two servers are on different subnet masks. I have never worked with machines on different subnet masks and I am having stange problems all relating to the firewall.

I am running the Windows Firewall on both servers and have opened the following ports between each server:
TCP: 123;135;137;162;3268;389;42;530;53211;53212;53;88
UDP: 123;135;161;389;42;530;53;88

S1 is the primary DC. S2 is also a DC on the domain. DNS server is install on both servers with a Host (A) record pointing to each other.

If the firewall is OFF on S1, when I login (through RDP) to S2 it takes about 3 seconds. With the firewall ON on S1, it takes about 5 minutes. I can't run web applications on S2 as I think it is timing out.

What ports do I actually need to open between these two servers? Is it possible to open all ports between these two servers only?

Any help gratefully received.

James

02-17-2009, 10:39 AM	#1 (permalink)
fjalcroft Registered User Join Date: Feb 2009 Posts: 1 OS: xp sp3	Firewall Ports Hi I am having a problem with two servers which are situated in a data centre. One server (S1) is our physical server in a rack. We have recently rented a virtual server (S2) from the data centre. Due to the configuration on the network, these two servers are on different subnet masks. I have never worked with machines on different subnet masks and I am having stange problems all relating to the firewall. I am running the Windows Firewall on both servers and have opened the following ports between each server: TCP: 123;135;137;162;3268;389;42;530;53211;53212;53;88 UDP: 123;135;161;389;42;530;53;88 S1 is the primary DC. S2 is also a DC on the domain. DNS server is install on both servers with a Host (A) record pointing to each other. If the firewall is OFF on S1, when I login (through RDP) to S2 it takes about 3 seconds. With the firewall ON on S1, it takes about 5 minutes. I can't run web applications on S2 as I think it is timing out. What ports do I actually need to open between these two servers? Is it possible to open all ports between these two servers only? Any help gratefully received. James