We have a very simple network, which is done the following way:
ASA 5505 > Cisco 3550 > End-User PC's AND One Windows Server
The on-site users constantly access the server for apps such as Exchange. Creating these connections should NEVER involve the ASA (it should stay strictly layer 2, we only have one vlan).
For the past couple months, we have gotten complaints that users are constantly getting disconnected from Outlook, and having problems logging on in the mornings (establishing network connections taking upwards of 30 seconds).
We couldn't see ANYTHING odd happening, until we began looking at syslog this morning:
%ASA-3-305006: portmap translation creation failed for tcp src inside:10.60.1.42/1990 dst inside:10.60.1.200/445
Apparently inside hosts are somehow hitting the ASA and its trying to PAT them? Anyone have any insight into this?