#Active directory ports for mac windows#
Make sure that all Windows 2000-based member servers and Windows Server 2003-based member servers that will be granting access to resources have UDP 138 connectivity to the remote PDC. However, they do not rely on using their own PDC. Windows 2000 and Windows Server 2003 also try to contact the remote user's PDC for resolution over UDP 138.If that communication fails, a Windows NT 4.0-based computer contacts its own PDC, and then asks for resolution of the name. Windows NT 4.0 tries to resolve manually typed names by contacting the PDC for the remote user's domain (UDP 138).If the computer cannot display a list of the remote domain's users, consider the following behavior: When you add permissions to a resource on a trusting domain for users in a trusted domain, there are some differences between the Windows 2000 and Windows NT 4.0 behavior. In addition, you would have to enable IP PROTOCOL 47 (GRE). For PPTP, the following ports must be enabled. This limits the number of ports that the firewall has to open. Or, you can establish a trust through the Point-to-Point Tunneling Protocol (PPTP) compulsory tunnel. However, this behavior may be changed by a specific registry setting. This is because ICMP is directly hosted by the IP layer.īy default, Windows Server 2003 and Windows 2000 Server DNS servers use ephemeral client-side ports when they query other DNS servers. Unlike the TCP protocol layer and the UDP protocol layer, ICMP does not have a port number. If you want to minimize ICMP traffic, you can use the following sample firewall rule:
The Windows Redirector also uses ICMP Ping messages to verify that a server IP is resolved by the DNS service before a connection is made, and when a server is located by using DFS. If it does not receive ping responses, it fails the LDAP request with LDAP_TIMEOUT. It sends ping requests to verify the server is still on the network. The Microsoft LDAP client uses ICMP ping when a LDAP request is pending for extended time and it waits for a response. (**) For the operation of the trust this port is not required, it is used for trust creation only.Įxternal trust 123/UDP is only needed if you have manually configured the Windows Time Service to Sync with a server across the external trust.
#Active directory ports for mac how to#
(*) For information about how to define RPC server ports that are used by the LSA RPC services, see: Examples are Windows NT-based operating systems or third-party Domain Controllers that are based on Samba. NetBIOS ports as listed for Windows NT are also required for Windows 2000 and Server 2003 when trusts to domains are configured that support only NetBIOS-based communication.
This change was made to comply with Internet Assigned Numbers Authority (IANA) recommendations. Therefore, you must increase the RPC port range in your firewalls. The new default start port is 49152, and the default end port is 65535. Windows Server 2008 newer versions of Windows Server have increased the dynamic client port range for outgoing connections.
The two domain controllers are both in the same forest, or the two domain controllers are both in a separate forest.
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