Filter yahoo messenger

Posted on 2005-03-16
Medium Priority
Last Modified: 2013-12-26
I am using FreeBSD 4.9 as a routing/web/mail (pop3) server

I want to filter all clients that are using Yahoo Messenger.
All the solutions that I could find with Google are useless.

I even tried to filter all ports from 500 to 65500 and no use, Yahoo Messenger
still connects.

I found a doc. that explains that filtering a certain IP addres from the authentification server
will stop users from using YM but the solution never worked. I filtered entire IP classes that I collected
using netstat -n or trafshow. No use.

Please tell me a solution, with ipfw rules if it's possible.
Please test te solution, because it's higly iprobable that it will work.

My outside interface it's fxp0 using IP 82.77.xxx.xxx
    inside interface it's rl0 using IP

ports 21, 22, 25, 80, 110, 445, 1526 and 3389 MUST remain open to all connections.

Much apreciated
Question by:calinutz
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
LVL 16

Expert Comment

ID: 13556501
As far as i know, Yahoo messenger uses the standard HTTP port 80 to connect to the system. You should probably employ firewall at your server. Almost all firewalls give you packet-filtering ability....you can block TCP packets going to the yahoo server.

LVL 48

Expert Comment

ID: 13560704
Messenger can proxy via port 80, so if you have other web traffic, it would be tricky to separate.
LVL 11

Author Comment

ID: 13609246
I know that...
That's why I have a problem. I thought you experts could help me solve this.
Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

LVL 16

Expert Comment

by:Hanno P.S.
ID: 13613871
Depending on your firewall you can filter "on application-type": I've done this
with Check Point firewall successfully -- but don't know what firewall you could
The problem ist that the HTTP traffic on port 80 has to be examined more
deeply than just with "packet filtering" standards
LVL 11

Author Comment

ID: 13659649
I have ipfw firewall.
Can you help me with this problem?

Accepted Solution

Ghitza earned 2000 total points
ID: 14017433
Did you try to ask yahoo to assist you with this ?
A friend of mine had the same problem and he contacted yahoo helper and they sent him a specific script (destinated to his specific version of FreeBSD) that must be executed and the script generates some list with the IP's of the servers currently used by yahoo messenger , IP's and ports that must be added to your firewall.
And he must keep in touch with the helpers because yahoo keeps updating the list of servers that they use.
So I suggest that you write to the yahoo helper (it's in your contacts list), and ask them to assist you, and I am sure that they will. And they will send you the version of the script that suits your FreeBSD version.

Good luck
LVL 11

Author Comment

ID: 14017500
I wonder how come I did not think of that in the first place... contact yahoo helper... it was allways in front of me
Thanks a lot man. You deserve the points. I was going to ask for a refund of my points for this question these days but you made my day.
Thanks again
Chiar ca meriti punctele

Featured Post

Learn how to optimize MySQL for your business need

With the increasing importance of apps & networks in both business & personal interconnections, perfor. has become one of the key metrics of successful communication. This ebook is a hands-on business-case-driven guide to understanding MySQL query parameter tuning & database perf

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Here is how to use MFC's automatic Radio Button handling in your dialog boxes and forms.  Beginner programmers usually start with a OnClick handler for each radio button and that's just not the right way to go.  MFC has a very cool system for handli…
Have you tried to learn about Unicode, UTF-8, and multibyte text encoding and all the articles are just too "academic" or too technical? This article aims to make the whole topic easy for just about anyone to understand.
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
How to fix incompatible JVM issue while installing Eclipse While installing Eclipse in windows, got one error like above and unable to proceed with the installation. This video describes how to successfully install Eclipse. How to solve incompa…

718 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question