Is that 192 ip address that is reporting the Teredo Time out a Windows Vista or Windows 7 PC? Vista and 7 have IPv6 protocols enabled by default and routers will report this condition as a connection time out in the logs. If this is a Vista or 7 PC, try disabling the IPv6 Protocol in "Local Area Connection Properties".
This looks like a IPv6 protocol trying to make a connection to the ISP address listed however it's timing out since the ISP is not responding due to the ISP not supporting IPv6.