I am having a hard time with this one so any help is needed and appreciated - I'm running out of options. I setup a Cisco 851w using the SDM gui. I'm not a CCNxxx anything just a lan admin but I can understand most of it.
All works ok including vpn connections, etc. here's the weird thing.
For inside pc clients on the lan who are not using a mail client like outlook..... Some internet mail works ok, some don't. Rogers and yahoo email works ok. Gmail, Neomail, hotmail do not. Specifically I can receive mail from these but I can't send. When trying to send it just just hangs and times out. And yes, when I bypass the router and go straight thru the dsl modem all is ok. I've tried opening up the firewall, wiping out the acls and it still happens. Its drivin me a bit crazy cause it makes no sense but its happening. I thought it was the dsl modem. It was changed, no help. Thought it was firewalls, nope, disabled all of it for testing.
Fact remains that when I take the router out of the loop, all works ok. Cisco have tried but they can't find it...they say it looks ok. So much for that. Anyone have similar? I've read stuff about the natchi worm mitigation..where's that in the router? Could MTU rate change help? Not sure where that's changed... What else on the router can cause this?
Thanks TFC