TCP Timeout error 258 after Firewall chnage

  • Hi All,

    We are getting timeout errors from app servers after a firewall change was made. Please share you thoughts on this.

    Here are the errors:

    TCP Provider: Timeout error [258].

    System.Exception: System.Runtime.InteropServices.COMException (0x80004005): TCP Provider: Timeout error [258]. at ADODB.ConnectionClass.Open(String ConnectionString, String UserID, String Password, Int32 Options) ...

    Environment:

    SQL 2012 - 4 node cluster/Win 2K12

    Many thanks in advance.

  • Sometimes the TCP\IP wasn't listening to SQL Server when the service is restarted. So disabled TCP and reenabled after service restart

  • Sql server restart was not made. There is only intermittent TCP errors from clients on DMZ. No errors on clients accessing from internal network.

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