Quotes:


> All in all I would say in general its much harder to develop generalized
>attacks on X25 networks. That is not to say any specific X25 network is 
>secure. For example is a dumb terminal is used the RS232 lead is still easy 
>to hack into before you get to the X25 network. If the x25 switches <i.e. 
>routers> which make up the network have remote access available on well 
>known address they can be hacked easily.

X.25 networks often use PADs with excellent remote diagnostic facilities.

The difference, as I heard one Tymnet engineer explain, is when a X.25
gets hacked the engineering staff gets the opportunity to prepare new
resumes. When a TCP/IP network gets hacked the engineers get an opportunity
to present a paper at the next conference.


   Sean Donelan, Data Research Associates, Inc, St. Louis, MO