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 2K12Many thanks in advance.