We have started to see a few of our laptops report 25% of more continuious CPU usage for the firesvc.exe service according to task manager. External web sites will be unavailable during this time as well. I first though it was an issue with IPv6, but after having a few users disable ipv6 and reboot, the issue would resurface again. I see these in the firesvc log
NipsMessaging.cpp ERROR (4268) NimQ - Unexpected mac address value
NipsMessaging.cpp ERROR (6336) NimQ - Unexpected large transport payload: 0xbf39e01000000837 (bug 579380)
I had to disable hips/FW from EPO until we can figure this out.
Support is aware.
check this thread (more of symptoms alike): https://community.mcafee.com/thread/48560?start=0&tstart=0
This might have something to do with VPN client software, but they aren't the only source of these symptoms AFAIK.