Hi All,
I've three Windows 2008 domain controllers. Using portqry to test LDAP connectivity it responds to TCP but not UDP（test in domain controller , no firewall）. I restart ADDS and retest UDP 389 are the same error .
Test returns the results are as follows:
Starting portqry.exe -n computerIP -e 389 -p UDP ...
Querying target system called:
computerIP
Attempting to resolve IP address to a name...
IP address resolved to computerIP
querying...
UDP port 389 (unknown service): LISTENING or FILTERED
Using ephemeral source port
Sending LDAP query to UDP port 389...
LDAP query to port 389 failed
Server did not respond to LDAP query
portqry.exe -n computerIP -e 389 -p UDP exits with return code 0x00000001.
isoft