Frequently Asked Question

Can I use more than one software firewall?

 Print Article


Due to the potential for conflicts and problems that can arise from using
multiple firewalls, ZoneAlarm recommends the use of only ZoneAlarm and
a virus scanner.

When multiple software firewalls are installed, there is no way of ordering
which product will get a packet and which will report it; the determination as
to which product gets operating system preference to monitor the traffic will
be made at random. When running more than one firewall, ZoneAlarm
might not be able to report on incoming port scans or hack attempts. In
some cases, running two software firewalls at the same time can cause
more problems than running only one.

ZoneAlarm works well with hardware firewalls - in these cases the hardware  firewall would protect incoming ONLY (you would need to set that up for logging if you wish to see those alerts) while ZoneAlarm continues to protect with Outbound Control. Also, note that some software firewalls, such as the built-in Windows XP firewall) provide inbound protection only.

ZoneAlarm provides both inbound protection and outbound anti-Trojan
protection via application control. 

Note - Links to sites other than are provided for the
convenience of our users. ZoneAlarm does not provide, and is not
responsible for, the content users may find on such sites.

If you need assistance with any ZoneAlarm product, please contact a Customer Service agent using our Live Chat option below:

Our agents are standing by
to help you. Click to chat.
Customer Service Rating by LivePerson  

Last Update: May 26, 2011
Related Entries
Article Name
You want to stop getting multiple emails from ZoneAlarm.
How to Upgrade your ZoneAlarm software
How do I read the ZoneAlarm log files?
I'm having problems using ZA on a multi boot machine.
An online security scan says my ports are open.
Mailsafe - How it works
Does ZoneAlarm Handle PKI?
I have upgraded to Windows 10 and ZoneAlarm has disappeared.
I'm having problems sending or receiving emails

Live Assistance
Please let us know what you think about this article.
Required items indicated with *
Document Rank : * Poor     Excellent
Comments :