Tag Archives: IPv6 Neighbor Cache

Minor Palo Alto Bug concerning IPv6 MGT

A few month ago I found a small bug in PANOS, the operating system from Palo Alto Networks. It is related to an IPv6 enabled management interface. The MGT address was not reachable when the firewall operates in layer 2 mode, that is, had layer 2 interfaces along with VLANs. Luckily, this bug is fixed with the new software version 6.1.2 which was released this week (bug ID 67719).

Following are a few listings that show the incomplete handling of the IPv6 neighbor cache of the MGT interface in the old version (pre 6.1.2).

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Windows 7 IPv6 Neighbor Cache Bug?

Last year, I posted the following bug report on the IPv6 hackers mailing list, but nobody ever responded. I also sent it to Microsoft, but heart no response either. Since I am owning this blog since a few days, I will post it here, too:

Hello everybody,

I am testing with the THC-IPV6 Toolkit from van Hauser and noticed that Windows 7 adds and deletes several neighbor cache entries even on interfaces which are not connected. It further adds and deletes complete network interface cards from the neighbor cache. I would like to know if this is a feature or a bug.

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