5.Configure an IP address and subnet mask on the Cisco 827 Ethernet interface.
(Optional) Enable NAT inside on the Ethernet interface.
Router(config)#interface ethernet 0
Router(config-if)#ip tcp adjust-mss 1452
!--- If the ip tcp adjust-mss 1452 command is not supported, try
!--- ip adjust-mss 1452. If this command is not supported,
!--- upgrade to the latest Cisco 827 software or follow the
!--- procedure in the Possible Required Configuration Steps on the PC.
Router(config-if)#ip nat inside
I did the command on several IOS-Versions 12.2.1 to 12.2.10 on Routers 806 with IPsec-FW-Software. Never had a problem to adjust the segment-size for DSL-Connections. If your Software is able to provide PPPoE, then you MUST be able to adjust your mss.
We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...