OS 10.4/10.5 still uses the Apple File Protocol (formerly, Appletalk File Protocol, or AFP). You should take time to read through the thread I linked to in my previous post above, the Vintage Macs Google Group thread. The most relevant post in that thread is my post in the middle of the thread. I give a lot of detail in that post.
Now if you want to ditch ShareWay IP, there's a simple Apple-approval hack to do so. The "TCPQuantum" hack is described in this Vintage Macs thread. (Search for "tcpquantum" in that thread and look for my post under JDW -- I present all the steps clearly.)
Of course, the information I am directing you to is tailored toward SE/30 users or users of other 68k Macs that have built-in Ethernet. I am quite ignorant of CC's, but I have read that some 3rd party cards were available to add a real Ethernet port to CC's. (Here's an ethernet card for under $10, sold by a very reputable EBAY seller.) Yet other Ethernet cards are available for the SE, and SCSI-to-Ethernet adapters are commonly found on EBAY, for use with your Plus and Classic. So with all your Macs directly using Ethernet, it would be the same setup as I have with my MacCon Ethernet card in my SE/30 when connecting to my G4 Cube. In such a case, you would not need any LocalTalk/PhoneNet to Ethernet bridge. And so long as you are using some flavor of System 7.5, System 7.6 or OS 8.1 (or higher), you just need to follow the steps I present on those other threads and you can get networking right away with your modern OS 10.4 or 10.5 Mac.
Now if you want to ditch ShareWay IP, there's a simple Apple-approval hack to do so. The "TCPQuantum" hack is described in this Vintage Macs thread. (Search for "tcpquantum" in that thread and look for my post under JDW -- I present all the steps clearly.)
Of course, the information I am directing you to is tailored toward SE/30 users or users of other 68k Macs that have built-in Ethernet. I am quite ignorant of CC's, but I have read that some 3rd party cards were available to add a real Ethernet port to CC's. (Here's an ethernet card for under $10, sold by a very reputable EBAY seller.) Yet other Ethernet cards are available for the SE, and SCSI-to-Ethernet adapters are commonly found on EBAY, for use with your Plus and Classic. So with all your Macs directly using Ethernet, it would be the same setup as I have with my MacCon Ethernet card in my SE/30 when connecting to my G4 Cube. In such a case, you would not need any LocalTalk/PhoneNet to Ethernet bridge. And so long as you are using some flavor of System 7.5, System 7.6 or OS 8.1 (or higher), you just need to follow the steps I present on those other threads and you can get networking right away with your modern OS 10.4 or 10.5 Mac.