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# Connecting to Active Directory domain controllers
$noldapserver=0;
...
#print VALID "bad.example.com 550 User does not exist.\n";

close VALID;

root@mxgw:~# tcpdump -i eth0 port 389
tcpdump: verbose output suppressed, use -v or -vv for full protocol de
+code
...
16:34:36.379857 IP srvleon.mailgw.com.ldap > 192.168.135.9.59727: Flag
+s [.], seq 1471:2919, ack 462, win 258, options [nop,nop,TS val 47632
+9175 ecr 1191504979], length 1448
16:34:36.379868 IP 192.168.135.9.59727 > srvleon.mailgw.com.ldap: Flag
+s [.], ack 2919, win 182, options [nop,nop,TS val 1191504981 ecr 4763
+29175], length 0
16:34:36.380276 IP srvleon.mailgw.com.ldap > 192.168.135.9.59727: Flag
+s [.], seq 2919:4367, ack 462, win 258, options [nop,nop,TS val 47632
+9177 ecr 1191504981], length 1448

[root@vm1000 ~]# tcpdump -i ens32 port 389
tcpdump: verbose output suppressed, use -v or -vv for full protocol de
+code
...
16:28:02.669954 IP pauline-mkt.mailgw.com.41948 > srvleon.mailgw.com.l
+dap: Flags [P.], seq 1:58, ack 1, win 229, options [nop,nop,TS val 80
+0294600 ecr 476285837], length 57
16:28:02.674297 IP srvleon.mailgw.com.ldap > pauline-mkt.mailgw.com.41
+948: Flags [P.], seq 1:23, ack 58, win 260, options [nop,nop,TS val 4
+76285837 ecr 800294600], length 22
16:28:02.674431 IP pauline-mkt.mailgw.com.41948 > srvleon.mailgw.com.l
+dap: Flags [.], ack 23, win 229, options [nop,nop,TS val 800294605 ec
+r 476285837], length 0