Strange Email Routing Issue.. COMPLEX!

[Luke122]

Update: Still no progress on this.

Linksys tech support = teh sux0r.

[Luke122]

Sadly, this issue is still going on. I havent had any luck solving this, if anyone has any ideas, I'm open to hearing them!!!!

[Drum Thumper]

I've heard of some people having issues with bandwidth in Canada, one of the ISPs is bottlenecked--that might explain the slow retrieval times.

Off to find the posts. BBIAB.

Edit--Rogers is the ISP, this link heads right to the World of Warcraft forum thread regarding extremely high latencies in game. Dunno who your ISP is though.

Hopefully this helps.

Edit #2: What brand is the switch?

[Crazy Buddhist]

I'm guessing the Linksys has more restraints imposed on it by the firewall system as it is outward facing to the internet whilst the other router is the VPN to head office.

Have you looked at the firewall setup to see if downloading attachments is barred in some way at that point? It would make sense for the corporate (stop downloading of stuff from the internet) but would mess up this guy's way of working.

If this is the case place an exception rule in the firewall rules chain that allows him to download attachments and files before the general cut-out rule.

[Luke122]

I've tried that already Matthew... there doesnt seem to be any kind of filters in place on the linksys, and as far as I know, it doesnt support stripping attachments. I can ping the mail server and trace to it, and can receive emails without attachments just fine.. tooo weird.


Both routers actually face the internet; each have a unique IP, but both share the same physical connection.
The only difference between the two gateways is the Cisco routes all traffic up to head office, then out through their proxy, whereas the Linksys goes straight out to the internet.

The ISP is actually getting his bandwidth through Bigpipe, and we sustain 11-15mbps, with fairly low latency.

[Crazy Buddhist]

Sure there is no software or hardware firewall sitting between the routers and his network? I meant at that level rather than on a router.

I've tried that already Matthew... there doesnt seem to be any kind of filters in place on the linksys, and as far as I know, it doesnt support stripping attachments. I can ping the mail server and trace to it, and can receive emails without attachments just fine.. tooo weird.

[OvRiDe]

Have you tried bypassing the Linksys entirely by plugging it into the switch that the Internet connection, the Linksys, and the Cisco are attached to? If you don't have more then 2 static IP addresses available from the ISP you may need to unhook the Linksys and use its credentials for the test. Anywho.. That should tell you if it is something in the Linksys Router or if it something on the ISP side.

[Luke122]

Have you tried bypassing the Linksys entirely by plugging it into the switch that the Internet connection, the Linksys, and the Cisco are attached to? If you don't have more then 2 static IP addresses available from the ISP you may need to unhook the Linksys and use its credentials for the test. Anywho.. That should tell you if it is something in the Linksys Router or if it something on the ISP side.

I'll test that this week when he's back in the office. I'm also going to take another router with me to replace the linksys entirely, and see if that solves it.

[Crazy Buddhist]

I still think this is a network level firewall issue.

[Luke122]

Well, I know that there are no devices between the wi-lan adapter, and the switch that feeds the linksys and the cisco routers. I traced the wire right from the roof into the switch, and then plugged the routers into the switch myself.