2006-08-10 19:09:39 · 4 answers · asked by francis o 1 in Computers & Internet ➔ Computer Networking
Yahoo Messenger works on port 5050. If the port gets blocked, Yahoo is smart enough to find an open port.
You could try blocking by IP addresses but they have a farm of IPs which is probably more work trying to figure out all of them
You might spend a lot of time trying to block users form using yahoo messenger, what about limiting their priviledges to install the software?
2006-08-10 19:29:33 · answer #1 · answered by jatbarjason 3 · 0⤊ 0⤋
Yahoo Messenger uses the following ports, in this order:
5050
80
Any available.
This makes it basically impossible to block Yahoo Messenger with a simple port block.
You need an intelligent proxy such as Dansguardian running with Squid on Linux or Microsoft ISA Server or a third party blocking package such as Surf Control to block Yahoo Messenger.
2006-08-10 19:20:43 · answer #2 · answered by Bostonian In MO 7 · 0⤊ 0⤋
If all the users are on a single machine, you can block the Yahoo application from running on XP Pro using the MMC.
2006-08-10 20:51:49 · answer #3 · answered by mountainlvr65 4 · 0⤊ 0⤋
in the settings on this you can block any chat
zoneAlarm internet security suite
all in one firewall / anti virus/ anti spyware
http://www.zonelabs.com/store/content/home.jsp
2006-08-10 19:46:36 · answer #4 · answered by Anonymous · 0⤊ 0⤋