Port Scans

This computer is on wireless network in the house. It uses 128 bit WEP encryption on the link to the wireless router in the loft (Linksys BEFW11S4).

The computer gets its IP configuration from the router via DHCP on the

10.1.1.0/24 network.

The WAN side of the router (192.168.1.0/24) is fed from a firewall/NAT box that belongs to a satellite ISP. The box runs Red Hat Linux.

So there are two firewalls and two layers of NAT between the computer and the internet.

Agnitum Outpost firewall is installed on the computer.

Yesterday and today I was amazed to see Outpost reporting port scans from internet addresses e.g. 212.179.171.30.

How can this be? The IP address of the computer is non-routable.

Any ideas please?

Nick

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Posted 5 years ago by Nick in Networking Firewalls

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