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On Thu, Jun 2, 2011 at 7:14 PM, Gordon Henderson wrote: > I'd try another router - simplest way forward. > > Actually, since you have another machine doing the gateway, you now have 2 > levels of NAT (unless you get a fixed IP forwarded through?) I have set up fixed IP forwarding. The router doesn't do any NAT-ting - though I suppose it'd be capable of doing so if I plugged another machine directly into the router. >> Basically, the connection occasionally dies and the router cannot be >> pinged. This lasts between a few seconds to a few minutes. > > I presume you've checked the output of dmesg in the Linux box? There are > (still) some Ethernet interfaces that have problems - dropped interrupts, > etc. although the only time I've seen it has been when running an interface > at high speed for a long time... (This was a Marvell chip) dmesg doesn't help much further other than that it gives me quite a few lines starting with SFW2-OUT-ERROR that's SuseFirewall2 related and Google suggests it's no big deal. > Changing the router is easy. For a start, it'll stop BT fiddling with it and > snooping your LAN, and giving away your network bandwidth for free (you know > they do that, don't you?) Frankly, I didn't. Even for business broadband (which I use - this is all for work). One thing I noticed yesterday is that when I run ipfm (IP Flow Meter; http://robert.cheramy.net/ipfm/) that tells me how much traffic is coming in and going out of the network and where it's coming from, I see some external IPs that receive several megabyte per second. Which not only is much more than is reasonable to expect (at some point the total was 260MB/s outbound for a simple business ADSL line), the amount per IP address is exactly the same every second, for minutes in a row. I'm not sure if this is just a bug in ipfm or if this points to some more serious issue. Thanks for your help anyway. Martijn. -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/listfaq