ÿ@FROM :telecom@delta.eecs.nwu.edu úÿ(Continued from last message) > Network Security Observations, leading international research journal > on network security, announces the birth of its sister publication > INTERNET SECURITY MONTHLY. > A mix of news briefs on incidents, accidents and potholes on the > datahighway, and a carefully selected set of essentials of immediate > importance to the network user, fill Internet Security Monthly. > Professional reporting on and senior network experience in network > system security warrant so. Focussing on firewalls, unix security, > cryptography, privacy, legislation, and contributions to the > international debates on how to protect your connections, the security > of the net, integrity of data/messages, risks, and many more vital > topics are covered. > Special sponsorship has made it possible to keep the subscription > rates low: including airmail delivery an international subscription > costs US $ 120, in the United States US $ 95. Gosh what a deal! Another company is going to repackage freely available information and sell it. Ohhh, I have my checkbook in hand. > Overwhelming worldwide interest prevents to honor requests for > trial-orders, samples and review copies. Oh yeah, I bet. Get the people to fork over money before they realize that they got nothing ... [TELECOM Digest Editor's Note: Well in fairness to them, you should remember that there are lots of people/organizations out there which *help research and locate* 'public' information. In other words, yes the information they propose to distribute is for the most part free and obtainable *if you know where to look* -- the internet being such a huge place these days -- but for a lot of newcomers to the net, it is simply easier to pay someone else to locate specific items of interest and save them the time. PAT] ------------------------------ From: jlundgre@kn.PacBell.COM (John Lundgren) Subject: Re: Automatic Callback Date: 20 Dec 1994 01:26:13 GMT Organization: Pacific Bell Knowledge Network alain arnaud (ecla@world.std.com) wrote: > I need to set up an automatic callback system. In more details, > someone calls the system, let it ring once or twice and hangs up. The > system calls him back and provides a dial tone. This could be done with any of the more intelligent modems and some software. You might be able to do it with a script file in one of your favorite telecomm programs, such as Procomm plus. External modems only require a serial port. My Zyxel modem detects DTMF frequencies, and can synth voice, etc. The modem could be made to dial out and flash, to transfer a call or forward it. John Lundgren - Elec Tech - Info Tech Svcs Rancho Santiago Community College District 17th St. at Bristol \ Santa Ana, CA 92706 jlundgre@pop.rancho.cc.ca.us\jlundgr@eis.calstate.edu ------------------------------ From: jlundgre@kn.PacBell.COM (John Lundgren) Subject: Re: Looking For MNP Protocol Specs Date: 20 Dec 1994 01:30:51 GMT Organization: Pacific Bell Knowledge Network Chris Kalisiak (kalisiak@cs.buffalo.edu) wrote: > I am looking for the MNP protocol specs from Microcom. If > anyone knows where I can find them on the 'net, please let me know. I've seen mnp specs on the net somewhre, but I can't remember where. Try one of the comp.dcom.modems or comp.sys.ibm.pc.hardware.modems newsgroups. Also, there should be some modem FAQs on the news.answers newsgroup. John Lundgren - Elec Tech - Info Tech Svcs Rancho Santiago Community College District 17th St. at Bristol \ Santa Ana, CA 92706 jlundgre@pop.rancho.cc.ca.us\jlundgr@eis.calstate.edu ------------------------------ Date: Tue, 20 Dec 1994 06:33:35 -0500 From: KMP@TIAC.NET (K. M. Peterson) Subject: NYNEX Voicemail Failure As I write this, NYNEX seems to be recovering from what I was told was a LATA-wide failure of their voice mail system ("NYNEX Call Answering"). Naturally, I'm rather concerned, as I'm in the interview process for new work for early next year. Anyone know if this happens more than very infrequently? One of the reasons that I was interested in this service was that it was billed as highly reliable. (BTW, it seems to have affected at least one ISDN customer that I know of ...) K. M. Peterson voice: +1 617 731 6177 Independent Consultant -- Systems and Networks fax: +1 617 730 5969 ------------------------------ Date: Tue, 20 Dec 1994 11:32:15 GMT From: johnl@iecc.com (John Levine) Subject: 500 Service Turned on, Sort of {Network World} reports that AT&T's 500 service tariff went into service at the end of last week. But before people can actually use 500 numbers, local telcos have to program their switches to know how to route 500 calls. At this point, the only place set up is Nevada Bell in the Las Vegas area. (Yes, I know that L.V. is non-Bell , but that's what {Network World} said.) Regards, John Levine, johnl@iecc.com Primary perpetrator of "The Internet for Dummies" [TELECOM Digest Editor's Note: Here in the 312/708 area, as of Tuesday morning, December 20, such calls were intercepted immediatly after the dialing of 1-500 with an intercept message saying call could not be completed as dialed. It waits for no additional digits after the 1-500 and immediatly cuts in with the intercept. PAT] ------------------------------ From: f.s.menzel Date: Tue, 20 Dec 1994 13:21:11 GMT Subject: Voicemail Security Notes I (blush) naturally prefer AT&T equipment, but am sending this in the spirit of helping fellow TELECOMers avoid pain. Since voice mail systems have become commonplace, they have become the criminal hackers' favorite vehicle for stealing telephone calls (a.k.a. toll fraud). Your system should be configured in such as way as to not allow callers from outside to make calls from your voice mail system to their destination of choice. Most voice mail systems provide a transfer function that allows callers to choose to transfer their call to a different extension rather than leave a voice mail message. The misuse of this function can result in impressive phone bills when those seeking free phone calls transfer to offshore locations rather than local extensions. Current law holds the equipment owner responsible for all calls emanating from their system, whether fraudulent or not. Voice mail and PBX/KEY systems typically have several ways to control such transfers, including forbidding it altogether. Please be sure you understand your options and have your system installed in a manner that precludes toll fraud. Oh yes, and consider mailbox security. I'm sure it's not in your best interest to share corporate secrets with your competition, so please educate your users about using meaningful mailbox passwords and be sure that your guest mailboxes don't invite hackers to take them over and use them as depositories for information about how to break into your or others' computer and telephone systems. Fran Menzel, Security Core Team, AT&T Global Business Communications Systems 908-957-5615 ------------------------------ Date: Tue, 20 Dec 94 12:24:33 EST From: Alex Cena Subject: Help With IS-41 and MAP Can someone help me with the differences between IS-41 protocol used by cellular networks in the U.S. and MAP used by GSM? Are they compatible so an existing cellular carrier who purchases a PCS license and builds a DCS1900 offer nationwide roaming between cellular and PCS? i.e. I have a cellular license in Chicago and a PCS license in New York -- can my subscriber in New York roam on my network in Chicago. Regards, Alex ------------------------------ From: jteen0@cris.com (John Erwin) Subject: Re: Pilgrim Telephone's 1-800-COLLEKT Date: 20 Dec 1994 07:08:52 GMT Organization: Concentric Research Corporation > [TELECOM Digest Editor's Note: I did try it out, and it does indeed > respond with a duck quacking several times followed by a voice saying > 'welcome to Pilgrim Telecom' or something like that. They ask you to > enter the number you are calling, then speak your name. You are then > put on hold and hear nothing for the next several seconds up to a > minute while the call is placed (and in my case rejected, as I don't > pay for collect calls! grin) ... PAT] I found something interesting out about this number: I used it to call my cellular phone collect, and it worked! This means you can get free phone calls to your cell phone from Pilgrim because they're network doesn't recognize that the cell phone's ANI is unbillable! [TELECOM Digest Editor's Quack Comments: Don't be too sure about that! They'll toss it into the billing system, and yes, on first try it will fall out. It will land at some telco somewhere in a suspense account after it falls out of the billing system. One or more adjustment clerks in the legion of back-office employees at telco whose job it is to keep the suspense ledger's balance as low as possible (at least on the debit side, where the final transaction will be a write off as uncollectible) will finally figure it out and reconstruct the paperwork as needed to push it back into billing *somewhere* -- just off 'his' suspense books. Even though the ANI is useless, someone will note that the call did go to your (cellular) phone once they find the telco which owns the particular exchange serving you. The charge will get to you eventually, just be patient. :) quack quack! PAT] ------------------------------ Date: Tue, 20 Dec 1994 03:15:06 -0500 Subject: Re: Pilgrim Telephone's 1-800-COLLEKT From: ndallen@io.org (Nigel Allen) Organization: Internex Online (io.org) It appears that Pilgrim Telephone's 1-800-COLLEKT and 1-800-*UCK-ATT do not work from Canada, or at least from the two Bell Canada payphones in Toronto from which I tried to call the numbers. Nigel Allen, Toronto, Ontario, Canada ndallen@io.org [TELECOM Digest Editor's Quack: Well, hey, there is a lot more to Bell Canada than just a couple payphones outside the store where you shop. But you realize what this means, don't you? It means you won't be able to help John Erwin in his attempts to defraud Pilgrim of its collect charges. Quack quack! I think I will quit for today and waddle over to my feeding trough and have lunch. PAT] ------------------------------ End of TELECOM Digest V14 #461 ******************************