After one of our sites started using
a 2801 (with ADSL WIC) for internet access some of our users strated
complaining they could not longer access MSN and Hotmail. It was a bit
puzzling at first since you could ping these sites but could not access
them via a web browser. The problem was the MTU setting.
The soultion was to use specify the MTU setting on each interface. ip mtu 1492 ip tcp adjust-mss 1452 If you were wondering what ip tcp adjust-mss 1452 does it modifies the maximum segment size (MSS) for TCP SYN packets traveling through the interface (see link below for more information). TCP MSS Adjustment http://www.cisco.com/en/US/docs/ios/12_2t/12_2t4/feature/guide/ft_admss.html |
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Problems Accessing Microsoft Sites |