Problem loading 1! web site with a mikrotik routing

I’m sure there are other sites but I’m having this most bizarre issue where I have a couple of internal routers (rb450g ros5.2) that if they are in the path to the Internet the adp.com web site is SUPER SLOW/doesn’t load.

I’m out of things to check. I’ve tried increasing the timeouts for connection tracking, I’ve packet captured the traffic before and after the router and compared packet for packet to see if something is being dropped. And many, many other things.

If I route the traffic over the old Cisco gear I’m replacing it works like a champ.

I’m thinking this has to be a bug of some sort. Although its probably triggered by something weird/non-compliant that the adp.com web site is doing.

Its very strange. Sometimes it doesn’t load at all. Sometimes its slow. Sometimes it loads just fine but that happens rarely. I cant find any other site that exhibits this behavior and I’d say its a problem with ADP if it didn’t work fine routed by Cisco gear.

Any ideas would be welcomed.

-Jacob