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Which ports does Performance Advisor need in order to monitor a server on a network?

avatar image By pilotwave 16 asked Sep 25, 2012 at 03:04 PM
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In order for Performance Advisor to properly monitor a server on the network, the following ports on the monitored server must be accessible to the SQL Sentry Server machine(s):

For SQL Server access: tcp 1433 (or whatever port is used by SQL Server)

For Windows Performance Counter access: tcp 445 (SMB, RPC/NP)

For WMI access: tcp 135 (RPC) -and- one of these ranges: tcp 49152-65535 (RPC dynamic ports -- Win2008 and Vista) -or- tcp 1024-65535 (RPC dynamic ports -- NT4, Win2000, Win2003) -or- a custom RPC dynamic port range (see below)

The only one that may be tricky for firewalls are the RPC dynamic ports. WMI (or any other process that uses DCOM) connects to a target server initially using port 135, and the target responds with a dynamic port number for WMI to use for the rest of the session. This port can be in one of the ranges above, which are quite large by default.

To address this, you can easily specify a custom range for RPC dynamic ports. You may have already done this in your environment in order to enable networked DCOM access for other applications. It is recommended that you start no lower than port 50000, and allocate no fewer than 255 dynamic ports.

For example, to do this on Server 2008, you can use this command: netsh int ipv4 set dynamicport tcp start=50000 num=255

You may need to reboot. More info: http://support.microsoft.com/default.aspx/kb/929851

On other Windows versions, you can use DCOM config in Component Services (http://support.microsoft.com/kb/300083) or the registry (http://support.microsoft.com/kb/154596). You will need to reboot.

You will also need to have your network administrator open up the same port range on the firewall between the SQL Sentry Server machine and any servers monitored with PA.

See Also: How to configure RPC dynamic port allocation to work with firewalls http://support.microsoft.com/kb/154596

How To Restrict TCP/IP Ports on Windows 2000 and Windows XP: http://support.microsoft.com/kb/300083

Using Distributed COM with Firewalls: http://msdn.microsoft.com/en-us/library/ms809327.aspx

How to troubleshoot WMI-related issues in Windows XP SP2: http://support.microsoft.com/kb/875605

DCOM port range configuration problems: http://support.microsoft.com/default.aspx/kb/217351

The default dynamic port range for TCP/IP has changed in Windows Vista and in Windows Server 2008: http://support.microsoft.com/default.aspx/kb/929851

Troubleshooting RPC across Firewalls (or, what the developers forgot to explain): http://www.bandwidthco.com/whitepapers/netforensics/rpc/Troubleshooting%20RPC%20Across%20Firewalls.pdf

Service overview and network port requirements for the Windows Server system: http://support.microsoft.com/kb/300083

avatar image By sjasani ♦♦ 751 answered Sep 25, 2012 at 03:05 PM
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asked: Sep 25, 2012 at 03:04 PM

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Last Updated: Oct 07, 2014 at 06:36 AM

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