Methods for port shutdown Graphic Tutorial _ network security

---Create IP Security policy in IP Security policy



Next---Enter the policy name, which you can call (Seal 25 port)

Next---Next---to the default selection of authentication methods (you can select the last one and enter a key string. The key is equivalent to the Super password)





Next---Finish---a property (named 25 port) window.


Property Window---Add--always press Next----to the authentication method (select the last one and enter a key string) ditto!

Next---The IP filter list by adding (name yourself before adding it. Or for the default name). Friend named Block 25 port



The newly-appearing window. Follow the box prompts to select. Click Add---Next---source address (my IP address)---next. Address (any IP address)---the next step. Select protocol type to fill (TCP)---port settings Select (25 from this port to any port )---sure!

There is one more item in the IP filter list (block port 25, or an option named for your own preference)---you select it---press Next!


In this window, if you have previously done this strategy, there are blocking action options, you can directly select (if not, you point to add, next name-to block the operation-the next check to prevent the next step, complete.) ) Next---Complete


Don't forget the last step. Right-click. Select the assignment. and then reboot. Take effect!

Take a look at the picture below:




Please note:
Send a message with software like Foxmail or Outlook, because 25 ports are stopped, and sending the message is unsuccessful. These Trojans are generally relied on for these methods. To disclose the secret to the outside although this kind of software cannot send an email. But through NetEase 163 online still can send mail because that is to use the 80 port.
Jie Tu just let everyone see through their own understanding of the text. Then compare the above several brief diagrams. There is no development to that step. Make sure that you've done something wrong. But according to the common sense, a little bit of computer Management, read the text will be