With a few slight modifications, I finally got my SE/30 on the internet! This endeavor was quite an adventure and it took a lot of research, along with lots of trial and error.
Here's how I did it:
Because the RJ45 Ethernet Port on my MacCon SE 30/E is not actually connected to anything, I used the Coaxial Thinnet Port instead. In order to connect the Thinnet port to my home network, I used a media converter called the "3com OfficeConnect Hub 8C". This media converter has a socket for a Thinnet BNC cable on one end and a series of ethernet ports on the other end. I plugged an ethernet cable into the eighth port on the converter and set it to the uplink mode by pressing a switch located next to it. I plugged the other end of the ethernet cable into my home network.
I found that even when running a Thinnet connection from just one SE/30 to the 3com hub, without Thinnet terminators the system does not recognize anything as connected. Because of this lack of terminators, I was stuck with a yellow "Coax Status" light on my hub. Luckily, I was able to purchase a miscellaneous lot of Thinnet terminators on eBay for a low price. These terminators are nothing more than resistors that tell the system where a computer is located. I placed a terminator at both the hub and computer, and immediately, the "Coax Status" light on my hub went green.
After everything was wired up correctly, I configured the software on my SE/30. I am running System 7.1, and I have installed MacTCP 2.1 on the computer. In the Network control panel, I selected EtherTalk, but in the MacTCP control panel, I selected Ethernet. I configured MacTCP as follows:
Obtain Address: Manually
Router Address: (IP Address of my home router ex. 10.0.0.1)
Subnet Mask: 255.255.255.0
Domain Name Server Information:
Domain: . (I just put a period here)
IP Address: (I used the IP Address of Google's free DNS, 8.8.8.8)
IP Address (this is the computer's IP Address, not the DNS's or router's): (On my phone, I used a free network scanner app called "Fing" to find an unused IP Address on my network, and then typed that in to manually assign an IP Address. ex. 10.0.0.88)
With these settings in place, I launched NCSA Telnet, and I connected to
www.telehack.com!