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just curious: &nbsp;what was the problem in the end? 
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just curious:  what was the problem in the end?

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I have a Netscreen 25 firewall.<br />
<br />
Today I saw a bunch of outgoing traffic on an IP address that I did not have listed as part of our ip block of computers, although it was a valid IP.<br />
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Our static IP range is xxx.xxx.xxx.1 to xxx.xxx.xxx.254 and it was IP .7<br />
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So, I blocked all outgoing traffic on .7 using our firewall. &nbsp;<br />
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Later I got a compliant from a user they could not access the internet. &nbsp;IP .86 was the IP on their computer.<br />
<br />
I am unable to PING .7 or .86. &nbsp;I then unblocked IP .7 and the computer with IP .86 could again access the internet.<br />
<br />
So, my question is, how can a computer be configured to use an IP address .86 that I can not PING AND the firewall thinks is a different IP .7. &nbsp;Is this an indication that the firewall is bad?
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I have a Netscreen 25 firewall.

Today I saw a bunch of outgoing traffic on an IP address that I did not have listed as part of our ip block of computers, although it was a valid IP.

Our static IP range is xxx.xxx.xxx.1 to xxx.xxx.xxx.254 and it was IP .7

So, I blocked all outgoing traffic on .7 using our firewall.  

Later I got a compliant from a user they could not access the internet.  IP .86 was the IP on their computer.

I am unable to PING .7 or .86.  I then unblocked IP .7 and the computer with IP .86 could again access the internet.

So, my question is, how can a computer be configured to use an IP address .86 that I can not PING AND the firewall thinks is a different IP .7.  Is this an indication that the firewall is bad?

Netscreen 25 Firewall displays wrong IP addresses

Hardware-based firewalls provide more sophisticated protection for inbound and outbound traffic than the simple Windows software firewall or the basic NAT firewalls found in routers. These devices implement techniques such as stateful packet inspection, deep packet inspection, and content filtering; and may include built-in antivirus and anti-malware protection.

Hardware Firewalls

Transmission Control Protocol/Internet Protocol (TCP/IP) is the set of networking protocols that define end-to-end connectivity specifying how data should be packeted, addressed, transmitted, routed and received at the destination. This functionality is organized into four abstraction layers which are used to sort all related protocols according to the scope of networking involved.