I've built an advanced rotuign appliance, and I'm having 2 outstanding problems, that I'm being to think are related to the linux ip/netfilter stack, choking on XP traffic (possiblity XP-SP2) hosts that are on the LAN. I'm running 2.4.30 at the moment.
The 2 problems I'm seeing:
1) Forwarded traffic (most notably web) is VERY slow with XP clients.
Example: Saw this last 2 nights ago: Appliance has a linksys Wifi bridge attached to a NIC. Customer browses through the appliance to the Linksys config page. It moves like molasses. He browse to the local Zope hosted made page. Slow as hell. I unplug his machine, and plug my linux laptop into same switch port. Linksys and Zope pages load adn reload instantly. Plug his machine in....slow again.
2) Zope serves user interface pages for the appliance. Zope has been locking solid for no apparent reason, but only when and Windows host is attached. The trick is SOME windows machine don't seem to cause a problem.
Example: I worked with a unit for 3 days using a customers XP desktop. Not a hiccup. My partner came in and attached to the network and starting connect to our appliance with his XP laptop. Within 15 minutes Zope was hung.
I'm really lost. ANY ideas out there?
I don't know if this is related or not, but a couple of this come to mind.
1) Check to make sure that it is not a ""windowing issue, i.e. the MTU/MRU, MSS, etc. 2) I know that XP SP 2 changes the number of TCP/IP connections that a computer can have open at any given time. I think the default prior to XP SP 2 was 50 or there abouts. Now the default for XP SP 2 is 10, or so I have read. Apparently this is a registry (?) setting that can be changed. From what I have read is that this was / is an effort by M$ to make sure that infected systems can only infect other systems at a controlled rate. This problem has primarily shown up on VoIP mailing lists as VoIP needs LOTS of small packets at any given time exceeding the amount that XP SP 2 will allow by default.
Grant. . . .
