what port numbers need to be open in the firewall for both DHCP and DNS servers running on WinServer2003?

Posted on 2005-04-10
Last Modified: 2010-04-18
Hi all,

I just need to know what port numbers (and type UDP or TCP) I need to add to the Windows Server 2003 Firewall so that clients can get an IP address from the DHCP server running on that machine?
I tried port 67 (DHCP supposed common port), but it does not work.  Turning the Firewall off allows clients to connect just fine.
I can't seem to fine the correct port numbers in the IETF common port listing - MS must be using something other that the standard port numbers for DHCP.

Right now, I have the firewall turned off, but I need to go live today and this little piece of information eludes me.
Question by:simplyamazing
    LVL 14

    Accepted Solution

    dhcp port 67 68 and 69 UDP
    DNS port 53 both UDP and TCP

    Author Comment

    Thank you!

    I was missing 69 UDP and 53 UDP

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