Run the command
nmblookup again with a
-d option (debug level) of 2 and a parameter of
'*' again. This time we are testing the ability of programs (such as
nmbd ) to use broadcast. It's essentially a connectivity test, done via a broadcast to the default broadcast address.
A number of NetBIOS/TCP-IP hosts on the network should respond with "got a positive name query response" messages. Samba may not catch all of the responses in the short time it listens, so you won't always see all the SMB clients on the network. However, you should see most of them:
server%
nmblookup -d 2 '*'
Added interface ip=192.168.236.86 bcast=192.168.236.255 nmask=255.255.255.0 Sending queries to 192.168.236.255
Got a positive name query response from 192.168.236.191 (192.168.236.191)
Got a positive name query response from 192.168.236.228 (192.168.236.228)
Got a positive name query response from 192.168.236.75 (192.168.236.75)
Got a positive name query response from 192.168.236.79 (192.168.236.79)
Got a positive name query response from 192.168.236.206 (192.168.236.206)
Got a positive name query response from 192.168.236.207 (192.168.236.207)
Got a positive name query response from 192.168.236.217 (192.168.236.217)
Got a positive name query response from 192.168.236.72 (192.168.236.72) 192.168.236.86 *
However:
-
If this doesn't give at least the client address you previously tested, the default broadcast address is wrong. Try
nmblookup
-B
255.255.255.255
-d
2
'*', which is a last-ditch variant (a broadcast address of all ones). If this draws responses, the broadcast address you've been using before is wrong. Troubleshooting these is discussed in the
Section 9.2.9.2, Broadcast addresses" section, later in this chapter.
-
If the address 255.255.255.255 fails too, check your notes to see if your PC and server are on different subnets, as discovered in
Section 9.2.2.4." You should try to diagnose this with a server and client on the same subnet, but if you can't, you can try specifying the remote subnet's broadcast address with
-B. Finding that address is discussed in the same place as troubleshooting broadcast addresses, in the section
Section 9.2.9.2s," later in this chapter. The
-B option will work if your router supports directed broadcasts; if it doesn't, you may be forced to test with a client on the same network.
