Hi, Can i know the port used by the follwing service? Kerberos-Adm (UDP)-749 Kerberos-Sec (TCP) 88 Kerberos-Sec (UDP) 88 LDAP 389 LDAP (UDP) LDAP GC (Global Catalog) Microsoft CIFS (TCP) 445 Microsoft CIFS (UDP) 445 NTP (UDP) 123 Ping RPC (all interfaces) DNS 53 Link State-Algorithm Routing Ad logon/dir rp FE BE Link state thanks, Prashanth