Sound like an ACL or firewall between the DMZ and the other network dropping
ESP.
Robert D. Scott Robert@xxxxxxx
Senior Network Engineer 352-273-0113 Phone
CNS - Network Services 352-392-2061 CNS Phone Tree
University of Florida 352-392-9440 FAX
Florida Lambda Rail 352-294-3571 FLR NOC
Gainesville, FL 32611 321-663-0421 Cell
-----Original Message-----
From: wireshark-users-bounces@xxxxxxxxxxxxx
[mailto:wireshark-users-bounces@xxxxxxxxxxxxx] On Behalf Of Josue Del Valle
Sent: Wednesday, June 17, 2009 4:16 PM
To: wireshark-users@xxxxxxxxxxxxx
Subject: [Wireshark-users] Help With EPS/ISAKMP
Hi,
I was hoping someone could help me with this issue. I have configured
IPSec on two Windows 2003 servers using certificates as the authentication.
If I run wireshark from one of the server while having both servers on the
same network, I can see a bunch of ESP which indicate to me that the traffic
is encrypted between the two servers. If I move one of the servers to
another network (DMZ) and try to communicate with the server located on the
trusted network, I can't and instead of getting ESP packets all I see is
ISAKMP packets. I have not change anything on the IPsec except the ip for
the server that has been moved to the DMZ. The trusted network as a
192.168.10.X subnet and the one on the DMZ is 192.168.20.X.
If I remove IPSec I can communicate from the DMZ to the LAN as intended
which indicate routing on the firewall is working fine. I know it is kind
of confusing, but I'm trying to figure out why WireShark shows ESP packets
when the server is on the LAN and ISAKMP packets when the server is moved to
the DMZ.
Thanks,
Josue
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