Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!ames!sun-barr!cs.utexas.edu!husc6!rice!kappa!hd From: hd@kappa.rice.edu (Hubert D.) Newsgroups: comp.dcom.lans Subject: Re: Ethernet security Summary: A solution which we have used Message-ID: <939@brazos.Rice.edu> Date: 27 Aug 89 00:45:08 GMT References: <3956@phri.UUCP> <3432@yunexus.UUCP> Sender: root@rice.edu Reply-To: hd@rice.edu (Hubert Daugherty) Organization: Rice University, Houston Lines: 24 Last year I designed a simple circuit which has used to reliably isolate ethernet segments (thin-net) from one another. It costs about 40 dollars in parts and 3 hours building time. The circuit consists of a stand alone uart, a max-232 level converter, a pair of relay drivers, and a pair of relays. A host of the users choice is connected to the serial device. Proper termination is maintained. If there is any interest in a schematic and a parts list for this form of solution, send me mail. If there is sufficient interest I'll post a postscript schematic and a parts list --==-- Hubert Daugherty Department of Electrical and Computer Engineering hd@rice.edu Rice University (713) 527-4035 Houston, TX 77252 --==-- Hubert Daugherty Department of Electrical and Computer Engineering hd@rice.edu Rice University (713) 527-4035 Houston, TX 77252