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IMFirewall Blog - Thursday, May 13, 2010
Block Internet Access,Block P2P,Web Filtering
 
# Thursday, May 13, 2010
Internet can be a benefit to business when used properly, but internet is often abused by employees and poses significant liability and security risks. Used improperly, the Internet can subject every organization to harassment claims, countless hours of lost productivity and innumerable security leaks and vulnerabilities.

Several important risks caused by improper internet usage:
1. Virus Infection
2. Lost Productivity
3. Legal liability
4. Bandwidth consumer

So it is necessary for you to restrict employees internet access on your network.

To achieve this goal,  first you need an internet access policy, which should be able to:

1. Clarify what constitutes acceptable use of Internet services.
2. Ensure employees understand who to contact with questions regarding acceptable use.
3. Ensure employees understand the penalties that arise from Internet misuse.
4. Help lessen an organization's spyware and virus infestation rates.
5. Provide human resources with signed documentation from each employee stating a pledge not to improperly use Internet services.
6. Help mitigate productivity losses.
7. Decrease dependence upon technology solutions used to enforce employee behavior.
8. Reduce the organization's liability resulting from harassment claims, copyright violations originating onsite and other illegal acts.

You also need an internet filtering product to assure your internet policy. Let's take "WFilter Enterprise" as an example, it enables you to monitor and filter internet access for all computers from a mirroring port of your switch. You only need to install WFilter in one computer to monitor the whole network.

Key Features:

  • Keep a detailed record of each web surfing and web posting.
  • Record all incoming and outgoing email content and attachment.
  • Monitor and archive instance messengers chat contents and activities.
  • Monitor and archive files transferred by web, ftp and IM tools.
  • Implement a policy to filter internet access during working hours.
  • Websites, messengers and p2p file downloading can be blocked to save bandwidth and raise productivity.
  • You only need to install WFilter in ONE computer to manage your whole network.

http://www.imfirewall.us

Thursday, May 13, 2010 3:23:47 AM (GMT Standard Time, UTC+00:00)    Block P2P | How to block downloading | How to block internet | How to block p2p | How to block websites | How to filter internet access  |   |  Trackback
# Monday, April 26, 2010

Though official Google Talk protocol is XMPP, it is more complicated and flexible than XMPP. Google Talk (GTalk) provides several ways for you to access your gtalk account, including:

  • 1). Official  "Google Talk" client.
  • 2). Gmail chat in google mail account.
  • 3). Google Talk Gadget -- a web version of Gtalk.

This makes it complicated for you to block usage of google talk on company network. This tutorial will guide you to block google talk, gmail chat and google talk gadget using WFilter.

WFilter identifies Google talk connections by signature matching. Blocking google talk is simple in WFilter.

The below examples demonstrates blocking of google talk and gmail chat.

1. Blocking of jabber, gmail chat and gadget

Set a blocking policy in WFilter to block jabber and google talk:

2. Blocked Google talk:




3. Blocked gadget


4. Blocked gmail chat

Monday, April 26, 2010 6:51:07 AM (GMT Standard Time, UTC+00:00)    Block Messenger | Chat Monitor | How to block internet  |   |  Trackback
# Friday, April 16, 2010

Do you notice that your staffs are playing MSN online games during working time? Do you know how to stop them playing games? Here we are talking about how to block MSN games.

 

This tutorial will guide you to block MSN online game with WFilter.

 

1. Open WFilter, choose 'System Settings—>Customize Protocols',set 'Protocol Name,Protocol Desc, Protocol Type, Show it in Blocking Rule' as the picture, then click 'New Pattern'.

2. Input the following words into the textbox. Then click 'Save Settings'.

Name:       MSN Game

Desc:        MSN Game

Type:        HTTP SEND

Begin Byte:  (Leave it as blank.)

Offset:      0
Format:     X-IM-URL
Content:    ^GET\s\/GameBrowser\/GameBrows

3. In 'Control Settings'-->'Blocking Levels'-->'Level Name: Block MSN Game'-->in tab 'Games and stock', check 'Block MSN Game'.

4. In 'User-computer Table', change the Blocking Rules of a certain IP --> 'Save Settings'-->'Apply Changes'.

5.Now let's check whether WFilter works!

Friday, April 16, 2010 8:54:09 AM (GMT Standard Time, UTC+00:00)    Block Messenger  |   |  Trackback
# Thursday, April 01, 2010
For security purpose, you might want to block employees file uploading to internet on your network. However, since there are so many tools can be used for uploading, it is extremely difficult to block them all.

Files can be uploaded in various ways:
1. Upload to certain websites, eg: webmail, file sharing websites...
2. Using msn/yahoo/icq messengers to send files.
3. Email attachments.
4. FTP
5. Other third party tools.

WFilter provide a simply solution to block file uploading on company networks. Using WFilter, you can block file uploading and file transfers of all computers from ONE computer.

This tutorial will guide you to block file uploading using WFilter.

First, block file uploading to websites.


Please notice "block uploading files via web pages" only works on HTTP websites. To control HTTPs websites, you can use "HTTPS black/white list" in "Others" of WFilter.

Second, block email attachments.


Third, block FTP and file transfer via messengers.


Last, block unknown protocols.

Blocking unknown protocols blocks file uploading using other unknown third party programs.


More information, please check "WFilter Enterprise".
Other related links:
How to block internet downloading?
How to monitor internet usage on company network?
Internet monitoring software for business
How to filter web surfing?
How to block websites and restrict internet access?
How to Block Bittorrent and bitcomet?
How to block msn file transfer?
How to block certain websites to save your productivity?
How to block AIM using WFilter?
Thursday, April 01, 2010 3:23:21 AM (GMT Standard Time, UTC+00:00)    How to block internet | How to filter internet access  |   |  Trackback
# Monday, March 08, 2010
Sometimes you may want to block facebook games during working hours. This tutorial will guide you to block facebook games using "WFilter Enterprise".

First, add a website black list.


Second, choose this website black list in certain blocking policy.



Third, apply this blocking policy to certain computers.


Now, facebook game is blocked.




Monday, March 08, 2010 1:27:31 AM (GMT Standard Time, UTC+00:00)    How to block websites | How to filter internet access  |   |  Trackback
# Friday, January 22, 2010
Google Talk (GTalk) is a free Windows and web-based application for instant messaging and voice over internet protocol (VOIP), offered by Google Inc. You may use "Google Talk" to send instant messages, transfer files, make PC-to-PC calls and audio conferencing.

However, sometimes you may want to block usage of google talk on company network. This tutorial will guide you to block google talk using WFilter.

Though instant messaging between the Google Talk servers and its clients uses an open protocol XMPP, it is more complicated and flexible than XMPP.
Google talk uses several ports to connect to its server:

1). Using Jabber standard tcp port 5222.
2). Using TLS port 443.
3). Using web chatting on port 80 in gmail.

So you can not block Google talk by simply blocking Jabber standard port. WFilter makes it simple to block google talk. Google talk connections can be identified and blocked by signature matching.

The below examples demonstrates blocking of google talk.

1. Blocking of Google talk and gmail chat

Set a blocking policy in WFilter to block jabber and google talk:

Blocked Google talk:









2. Block file transfer of Google talk

You also can block file transfer of Google Talk in WFilter. This will block file transfer of google talk without blocking of normal google talk text messaging.



More information, please check "WFilter Enterprise".
Other related links:
How to block internet downloading?
How to monitor internet usage on company network?
Internet monitoring software for business
How to filter web surfing?
How to block websites and restrict internet access?
How to Block Bittorrent and bitcomet?
How to block msn file transfer?
How to block certain websites to save your productivity?
How to block AIM using WFilter?
Friday, January 22, 2010 3:22:27 AM (GMT Standard Time, UTC+00:00)    Block Messenger | Block P2P | How to block internet  |   |  Trackback
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