how to block MSN, yahoo messenger and AIM on openbsd

peter333

Hi, every one,
I use openbsd 3.4 to setup a router and try to block MSN, yahoo messenger and AIM these chat program. but it doesn't work. I know msn uses port 1863, yahoo messenger uses port 5050,  aim uses port 5190. so, i tried to block out  these ports protocol tcp and udp in the pf.conf. but can't stop them.  any one can help me and give me an idea?

thank you very much

peter333

please, every one.

werix

try first block all
and open port when you need.

congli

将端口封了就OK。
MSN好象是1755.

剑心通明

现在这些及时聊天的是不是都跟qq那样光靠封端口不行了

peter333

thanks for your reply. i tried to block these ports. but it doesn't work. if you block these ports, they will scan other ports and use them.
i can block man . i just block {tcp, udp} from any to  207.46.0.0/16  port {80, 1863}. but i can't block yahoo messenger.
so, you see, these kind of chat program should connect to their server. if we can block the connection between my router and their server, it makes  sense. i think, yahoo messenger is the hard one to block. any one can give me a complete list of yahoo messenger server?
thank you in advance

levitate

面对现实吧,聊天工具堵是堵不住的,现在大家都看好http代理,你怎么关?关了网都上不去!关键是怎么利用他的问题,现在很多公司都开始网上即时通讯弄企业聊天服务器了,能节省很多电话费,节约很多时间啊^

剑心通明

其实只要不是把时间都用到聊天上，偶尔聊一下也无可厚非，只要把工作作好，娱乐一下我想也应该在允许范围内的，其实这些东西最好的解决方法就是用行政命令，呵呵

peter333

impossible?  how come there are many progeams for sale in the market to block chat program? any other idea?

thx

rainren

将这些即时聊天的服务器都block! 有点麻烦!