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[LDM #EGH-413691]: wnnh002/wedgefest

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  • Subject: [LDM #EGH-413691]: wnnh002/wedgefest
  • Date: Thu, 09 May 2013 15:02:05 -0600
Wesley,

Yes, send the password to 720-579-6286. I'll take a look at your LDM 
configuration-file. The one from 2004 should be OK, however, providing the 
ALLOW entries are still applicable (i.e., the host/domain names haven't 
changed).

> Hi Steve,
> 
> Our network folks think there is a problem with our ldmd.conf allow file.  
> This was the original ldmd.conf from 2004.  Since we upgraded LDM, do we need 
> to change to a different version or maybe we have it in the wrong path or 
> name?
> I can give you the password again to our machine if you have time to log in 
> and check it...or I can send it to you.  I appreciate your help.   Wes
> 
> 
> Here is the e-mail from our network folks:
> 
> 
> From what I can tell from capturing packets, it looks like multiple servers 
> from outside the TTU campus are able to reach wnnh002 on port 388 and begin a 
> conversation.  Here's a sample of what I'm seeing repeatedly.  Sorry for the 
> repetitive nature of the description.
> 
> 
> 
> 1.       An external server connects to wnnh002 on wnnh002's 388 TCP port.
> 
> 2.       Once the TCP conversation has been set up, the external server 
> issues something called a "ChannelData TURN Message" which wnnh002 proceeds 
> to acknowledge.
> 
> 3.       Then, wnnh002 does a successful reverse lookup on the same external 
> server it is already formed this conversation with (the correct IP is given 
> to wnnh002 from the DNS server).  I find this behavior a little unusual.
> 
> 4.       After the successful DNS request by wnnh002, wnnh002 sends a 
> "ChannelData TURN Message" back to the External server.
> 
> 5.       Immediately after sending that ChannelData TURN Message, wnnh002 
> sends the external server a "RST, ACK" message.  In packet capture parlance, 
> this is essentially wnnh002 saying it no longer wants to speak to the 
> external server.  I see this mostly when a server (in this case wnnh002) is 
> denying a connection from a server not in its access list.
> 
> I'm wondering if something could be broken with the LDM access list?  I've 
> attached a capture of some sample traffic from wnnh002 in case you might want 
> to send it to the vendor.

Regards,
Steve Emmerson

Ticket Details
===================
Ticket ID: EGH-413691
Department: Support LDM
Priority: Normal
Status: Closed