There are many serial port redirectors out there, typically used with telnet server (ethernet to serial) boxes like the SitePlayer Telnet, some of the Lantronix stuff, and stuff from Equinox and Digi. These are very common for remote out-of-band console port admin of switches and routers.
I never used RIPTerm; on the PC I later used Telix, but I used ANSITerm on my TRS-80 Model 4D with hi-res card. I still occasionally fire up the old Tandy 1400LT 8088 DOS laptop and use Telix for console work, and I still have a TRS-80 Model 4P (with an HxC floppy emulator) and use Mel Patrick's FASTTERM as well as my own ANSITerm (hi-res board required.....). Makes some interesting conversation in a datcenter to roll in with a TRS-80 4P in tow...... But it makes a reasonable terminal for many uses.
I ran my part-time BBS in Atlanta on that Model 4, too, incidentally.