While working on a side project I gleaned some useful information and thought it might come in hand in the future, and maybe for other people, so why not record it here.
A company I am associated with has a Cisco Pix 515 in their main office and actually happens to have a spare 501. So they thought it would be a good idea to have a VPN between their main office and their branch office. Their branch office has a Lucent Pipeline 75 for their 128 Kbps ISDN connection. The offered me a nice payday to get the VPN to work for them, so having quite a few years of Cisco and general network experience I happily accepted. Read on for a technical overview of the problems and solutions I encountered.
