I answered a question recently that came from mailing list to which I subscribe.
The questioner had received a security pop-up from VIPRE Antivirus Premium, the antivirus / antispyware / antiadware / firewall security program that I use and recommend.
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The popup advised that a computer at a specific IP address was trying to make a connection with his computer. It asked whether to allow that connection or not.
In response, I answered that, when VIPRE connects to a new network, it will ask you whether you want to trust the computers on that network. If you answer "no" you’ll get messages like that, unless you click the checkbox that tells VIPRE not to bother you any more with that question.
In his case, the IP address was one on his home computer network, and he intended to share files and printers with the other computer on the home network.
Fortunately, VIPRE has a setting in its Firewall controls that let you define a network, a range of IP addresses, or even a single IP address as either Trusted or Not Trusted.
To make the necessary changes, the process is simple and straight forward:
- Open VIPRE (double-click on the VIPRE icon in the Windows Status Bar)
- click on Active Protection, then the Firewall tab, then Zones,
- Select the "Trusted Networks & Zones" tab
- Click the Add button
- Add the description you want for the network (e.g., "my home network")
- Adapter: select the network adapter from the pull-down (you might have a network card and a wireless adapter, or even a phone modem)
- Address type: options are IP address, Range or Network. Pick Network
- IP address: based on the one you indicated, you would pick 192.168.1.0 (although 192.168.1.105 would work – but could be misleading, since the Mask setting will say that the last number is not important)
- Mask: 255.255.255.0 (this is also called a subnet mask). This will be 255.255.255.0 unless you’ve (or your router) has decided to set up the local network in an unusual manner.
You can confirm your network mask by Start > Run > cmd > ipconfig
For the network connection you’re using, check the Subnet mask. If it’s not 255.255.255.0, then change the above to whatever your network uses.
As you should be able to tell, this process should be very similar on any other firewall program, not just the firewall in VIPRE Antivirus Premium.