Firewall | Safety and security | Services | Telco, ICT and content provider A1


Firewall loweres the risks of virus infection, prevents from unauthorized data dispatch and eliminates possibilities of external connection to your device without your knowledge.

* A1 Firewall shields your computer from network attacks, although it doesn't completely protects from the viruses that might be already present on a device or penetrate as a result of your careless actions. To protect your mobile device or computer against infection, please follow basic security rules: don't open potentially unsafe files from unreliable sources, use antivirus software or A1 Antivirus service.

If Firewall detects a connection request which does not match the security rules and is potentially hazardous, the request will be blocked.

Available to all customers using A1 Internet Access or PRIVET Internet Access.

All A1 customers (including PRIVET).

How to activate (A1 customers):

  • via USSD *135*5*2# call key;
  • via My A1;
  • apply in A1 centers or in dealer sales points (you will need a passport).
How to activate (PRIVET customers):
  • via USSD *126*1*7*2# call key;
  • via My A1.


The service is free of charge. The used data is charged according to the current rates.