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Special Forums UNIX and Linux Applications Stop samba from querying trusted domain servers Post 302435119 by mph on Tuesday 6th of July 2010 11:44:22 AM
Old 07-06-2010
It's not listing from all the domains. It IS trying to reach the other controllers. The problem is that there's no route to some of the servers and others there's no route back to the machine. Doing a tcpdump yields the following

From my samba machine in the DMZ to, and back from, the local AD server:
Quote:
10:45:01.170297 IP 10.xxx.xx.34.44697 > 10.xxx.x.70.389: tcp 0
10:45:01.170434 IP 10.xxx.x.70.389 > 10.xxx.xx.34.44697: tcp 1188
To other AD servers with insufficient routing:
Quote:
10:47:00.154323 IP 10.xxx.xx.34 > 10.xx.xxx.128 tcp 99
10:47:10.462745 IP 10.xxx.xx.34 > 10.x.xx.223 tcp 99
There are 5 or so more remote AD servers from other domains that never come back for due to routing. During the time that it's attempting to query or connect with these servers file listings and such "hang" until the the local machine gives up.

Using the allow trusted domains = no parameter DOES limit the connection attempts to once every half an hour or so. Before that, it would try almost every time a directory listing or anything else that needed to tie a user name to an UID was attempted. It's not the fix, but it SURE helped.

The routing is something that will not be fixed. The other domains need not access nor communicate with our DMZ.
 

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NBTSCAN(1)						      General Commands Manual							NBTSCAN(1)

NAME
nbtscan -- program for scanning networks for NetBIOS name information SYNOPSIS
nbtscan [-v] [-d] [-e] [-l] [-t timeout] [-b bandwidth] [-r] [-q] [-s separator] [-h] [-m retransmits] [-f filename | scan_range] DESCRIPTION
This manual page documents briefly the nbtscan command. This manual page was written for the Debian GNU/Linux distribution because the original program does not have a manual page. nbtscan is a program for scanning IP networks for NetBIOS name information. It sends NetBIOS status query to each address in supplied range and lists received information in human readable form. For each responded host it lists IP address, NetBIOS computer name, logged-in user name and MAC address (such as Ethernet). OPTIONS
A summary of options is included below. -v Verbose output. Print all names received from each host. -d Dump packets. Print whole packet contents. Cannot be used with -v, -s or -h options. -e Format output in /etc/hosts format. -l Format output in lmhosts format. Cannot be used with -v, -s or -h options. -t timeout Wait timeout seconds for response. Default 1. -b bandwidth Output throttling. Slow down output so that it uses no more that bandwidth bps. Useful on slow links, so that ougoing queries don't get dropped. -r Use local port 137 for scans. Win95 boxes respond to this only. You need to be root to use this option. -q Suppress banners and error messages. -s separator Script-friendly output. Don't print column and record headers, separate fields with separator. -h Print human-readble names for services. Can only be used with -v option. -m retransmits Number of retransmits. Default 0. -f filename Take IP addresses to scan from file "filename" scan_range What to scan. Can either be single IP like 192.168.1.1 or range of addresses in one of two forms: xxx.xxx.xxx.xxx/xx or xxx.xxx.xxx.xxx-xxx. BUGS
Report bugs to alla@sovlink.ru (that's autor of nbtscan). I cannot promise to do anything but I might well want fix it. Remember: no war- ranty. At least it's worth what you payed for it. AUTHOR
This manual page was written by Ryszard Lach rla@debian.org for the Debian GNU/Linux system (but may be used by others) and is based on nbtscan author's README file. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Docu- mentation License, Version 1.1 or any later version published by the Free Software Foundation. NBTSCAN(1)
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