My colo provider provides IP addresses and expects routing much like a T-1 data provider. I get 4-5 "WAN" IP addresses and 32 "PUBLIC ROUTABLE" IP addresses. Their enterprise router expects another router (customer provided) to handle this forwarding. In this role, I currently use a RedHat 7.3 box with 2 NICs, simply with IP forwarding enabled. No special rules or shaping. Straight forward enough, and it's always worked without a hitch. Behind this router, I have another RedHat box acting as a NAT Firewall which protects my server farm. Now my problem. We've recently developed an application that makes outgoing requests to other websites and returns data. I'm noticing a serious lag in the amount of time it takes for this data to return to the server vs. our development environment in the office which uses a much slower internet link. If I test from the production RH7.3 "router", all data is returned extremely fast. If I step back to the NAT firewall, or further back into the server farm, I get serious delays. ICMP does not seem to reflect this problem, I'm assuming because of it's small packet size. Could MTU size be an issue here? All of my firewalls and routers use the default 1500 MTU size and the network is all 100Mbps up to the OC-48 internet backbone. Am I missing some router configuration? I've tried adjusting the MTU size on the router with no change in results. Any suggestions on where to go with this? -Ken _______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
