My suggestion would be the enumerated list I wrote out above.
("1) Select "Ethernet" in the AppleTalk Control Panel. Save when closing.
2) Open TCP/IP Control Panel, activate it (click yes when opening). Make sure "Ethernet" and "DHCP Server" are selected (the latter, unless you want to manually configure as uniserver mentioned).")
If you hadn't done those things, you weren't really on the internet. Selecting Built-in Localtalk means you're telling your machine to send AppleTalk traffic through your printer port... (or modem port or whatever). You're not even trying to get onto an AppleTalk network though.
Also if you have a TCP/IP Control Panel, MacTCP shouldn't be relevant (I don't know if someone wants to correct me there). I've only encountered MacTCP and MacPPP when trying to connect to the internet on System 6.
("1) Select "Ethernet" in the AppleTalk Control Panel. Save when closing.
2) Open TCP/IP Control Panel, activate it (click yes when opening). Make sure "Ethernet" and "DHCP Server" are selected (the latter, unless you want to manually configure as uniserver mentioned).")
If you hadn't done those things, you weren't really on the internet. Selecting Built-in Localtalk means you're telling your machine to send AppleTalk traffic through your printer port... (or modem port or whatever). You're not even trying to get onto an AppleTalk network though.
Also if you have a TCP/IP Control Panel, MacTCP shouldn't be relevant (I don't know if someone wants to correct me there). I've only encountered MacTCP and MacPPP when trying to connect to the internet on System 6.