Hi all,
I'm with TPG and thinking of using their VOIP
service. To do so I'll need to get an NB9W - my
current modem only has one port and no phone port.
Apparently the NB9w uses an SPI firewall.
Wikipedia lists the following pitfall:
"Microsoft's latest operating system, Windows
Vista, uses TCP window scaling for non-http (web)
connections. So do Linux kernels from versions
2.6.8 on. This behavior is incompatible with some
firewalls that use SPI (Stateful Packet
Inspection) as found in routers like the
Checkpoint NG R55, Cisco PIX and IOS, NetApp Cache
Appliances, SonicWall, D-Link DI-724U, Netgear
WGR614, and Linksys WRT54GS. [1] This may be
related to previous failures to work properly.
Pre-released (beta) versions of Vista allegedly
had more problems, including failed http (web)
connections through SPI firewalls.[2]"
http://en.wikipedia.org/wiki/Stateful_firewall#Pitfalls
I've searched the Ubuntu forum and searched a
little further, but come up with nothing specific.
Does anyone know if this information is accurate,
or out-of-date?
Thanks for any information or referral.
Regards,
Patrick
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