Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site rlgvax.UUCP Path: utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!genrad!teddy!panda!talcott!harvard!seismo!rlgvax!guy From: guy@rlgvax.UUCP (Guy Harris) Newsgroups: net.dcom Subject: Re: modems usable with call-waiting Message-ID: <339@rlgvax.UUCP> Date: Wed, 9-Jan-85 18:26:47 EST Article-I.D.: rlgvax.339 Posted: Wed Jan 9 18:26:47 1985 Date-Received: Sat, 12-Jan-85 00:37:51 EST References: <1362GMS@PSUVM> <1261@hou4b.UUCP> Organization: CCI Office Systems Group, Reston, VA Lines: 16 > Finally, it is desireable that the host treat loss of carrier > as a disconnect and logoff request from the user. Overriding > this feature ... may leave a port logged in after a user has > hung up without logging off. Another user who > dials in shortly thereafter will find him/herself already logged in > as the previous user. Definitely a security-hole. Some systems treat a loss of carrier for greater than N seconds, for some specified small N, as a disconnect and logoff request, but treat the initial loss of carrier as a "freeze output" signal and treat a reappearance of carrier within that N-second window as a "thaw output" signal. This way, a temporary line glitch leaves you logged in with a minimum of output lost, but a permanent disconnection terminates the session. Guy Harris {seismo,ihnp4,allegra}!rlgvax!guy