Windows Firewall disabled service blocking all

Discussion in 'Server Setup' started by Cameron Shaw, Sep 17, 2009.

  1. Cameron Shaw

    Cameron Shaw Guest

    I've a Windows Server 2008 Standard Edition SP2 box doing something very
    strange. We have Windows Firewall enabled via Group Policy but allows for
    exceptions. With the firewall on we can rdp into box, but our sql port is

    If I disable the Firewall Service, we lose all communications to server. RDP
    becomes instantly disabled and we still can't telnet the sql port.

    I've never heared of having more items blocked by disabling the firewall. I
    was hoping someone might have an idea what is happening.

    Cameron Shaw, Sep 17, 2009
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  2. I have never heard of a process that blocks RDP if the firewall is disabled.
    If you have an established RDP session and you change the firewall on or
    off, I have an idea it might drop the established session. If with the
    firewall disabled you can't RDP at all then something else is wrong.
    If you forget telnet and ports for a moment, can you communicate with the
    SQL Server with the firewall off?
    Anthony [MVP], Sep 18, 2009
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  3. Cameron Shaw

    Cameron Shaw Guest

    I had found a couple of different posts on the web experiencing the same
    issue, but unfortuately I couldn't find any microsoft documents on the
    topic. The issue they reporte was that you could turn off the firwall via
    group policy or through the control panel, but if you disabled the actual
    service via services.msc, etc. then all communication would stop.
    Cameron Shaw, Sep 22, 2009
  4. Ah, OK. Yes, it should be controlled through Policy, scripting or GUI and
    not by turning the service off.
    Anthony [MVP], Sep 23, 2009
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