My internet connection has been slowing down over the past 2-3 weeks. I use Comcast Cable, so I wasn't surprised. It's gotten to the point that I cannot receive HTTP requests.
I used Ethereal/Wire Shark to look at packets and found packets were severly out of sequence. Message said 'previous packet not found or didn't arrive'. I ran 'debug ARP' on my PIX 501. I see thousands of ARP requests coming from my internet default gateway (next hop) at the ISP. Some requests come from other internet IPs.
I ran anti-virus on my systems and found nothing.
First, how can I be sure I'm not the problem? I removed the PIX and installed a Linksys router and got the same problem. I removed my "secured" Linksys wireless AP and got the same thing. I connected directly to the cable modem with my laptop and it's still slow.
Is there anything else I can do to troubleshoot this issue? The ISP router is probably spoofed. Most requests come from the ISP, but there are a few other address thrown in there.
My ARP table show only the next hop and my 3 internal hosts. No errors on interfaces.
With 'debug arp' I get:
request on Outside from 24.x.x.x for 24.x.x.x. The "request for" is almost always different and not all for my subnet. There are thousands per minute.
A tech is coming out to test signaling, but I'm not too confident this will help.
Thanks for any advise you can give,