I encounter a difficulty situation, my ISP phone us for two times and told us that our LAN have computer keep sending out virus(through our firewall). they warn us that the internet connection will be suspended if we could not solve the problem.
We have Symantec antivirus corporation version 9 installed on servers and client software installed on all workstations. I did check antivirus server have recent defination file updated, and make sure it pushed to every machine on the LAN. everybody run full scan to make sure there are not virus in the office LAN. but they mention they still find the virus come out from our internet connection.
is there a way to find out which computer in our LAN send out virus ?