Fix for RDP tests

On Sun, October 18, 2015 10:22 pm, Kenneth S. Petersen wrote:

Hi Rob,
It works perfect here.
Using Xymon 4.3.21 with both 2008 / 2008 R2 / 2012 / 2012 R2 with no
issues at all.

Thanks for the update, I'll deleted the RDPNLA witch was the approach I
did to get it to work.

I'll too backup on the protocols.cfg updates in the next release.

Fra: Xymon [mailto:xymon-bounces at xymon.com] På vegne af Rob Steuer
Sendt: 19. oktober 2015 01:20
Til: xymon at xymon.com
Emne: [Xymon] Fix for RDP tests

Hi,

After trying to implement the RDP tests for monitored hosts I noticed that
they were returning a yellow warning with the warning text "Unexpected
service response".  I tried this for older hosts running Windows 2003 and
newer hosts running 2008/2012 with RDP using NLA.  It gave the warning
text for both.  So I'm guessing the original rdp test was implemented many
years ago (2010 per below) when things were handled differently.

The specification currently in the protocols.cfg file for RDP as it stands
today is as follows:

# Microsoft Terminal Services / Remote Desktop Protocol
# From Chris Wopat (http://www.xymon.com/archive/2010/01/msg00039.html)
[rdp]
                port 3389
                send "\x03\x00\x00\x1e\x19\xe0\x00\x00\x00\x00\x00Cookie:
mstshash=\r\n"
                expect "\x03\x00\x00\x0b\x06\xd0"

I couldn't find anyone who provided a true fix in the archives other than
suggesting doing a network trace.  So that's what I did.  After a bit of
testing I found the following to work:

# Microsoft Terminal Services / Remote Desktop Protocol
# From Chris Wopat (http://www.xymon.com/archive/2010/01/msg00039.html)
# Updated By Rob Steuer 10-17-2015 with send and expect strings that work
for current versions of RDP

[rdp]
                port 3389
                send
"\x03\x00\x00\x13\x0e\xe0\x00\x00\x00\x00\x00\x01\x00\x08\x00\x0b\x00\x00\x00"
                expect "\x03\x00\x00\x13\x0e\xd0\x00\x00\x12\x34"

I was tempted to rename the protocol test to [rdpnla] or something like
that to keep the old one around, but really the old one just didn't work
for anything, so IMHO I think it just needs to be replaced entirely.

I'd like feedback from others to see if this works for them also and see
the protocols.cfg updated in the next release of Xymon.

Thanks!
 Rob

Hi Rob,

I can confirm it's working for me as well. Thanks for the submission! It's
been committed at https://sourceforge.net/p/xymon/code/7700/


Regards,
-jc