At the time of the Morris worm, there was a single T1 line running across the bay (between Mt. View and Milpitas.) The line to sun-arpa was a 56k link.
The only real 'protection' was that ip_forwarding was set to 0.
nope. The T1 (to the Internet) came in when we connected to BARRnet.
SWAN got T1s (Dallas, D.C., Boston) about the same time.
Then RMTC came on-line with a T1, and Denver-Dallas, and Chicago-Dallas got T1s. Then the SWAN 'ring' got a pair of T1s. The cross-bay link went to a DS3. Lots of offices got upgraded to 10BaseT in the form of AT&T's "starnet" offering.
The only real 'protection' was that ip_forwarding was set to 0.