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Re: fwd: [Wlug] Filtering attachments via a Sendmail ruleset?
by Paul Lussier 06 Apr '01

06 Apr '01

In a message dated: Thu, 05 Apr 2001 15:48:11 EDT Jeffry Smith said: >OK, I know we do something to "defang" stuff, could I / you pass what it >is on to this list, to answer this question? > >jeff >------- Forwarded Message > >From: "Dave Coutu" <cout(a)alum.wpi.edu> >To: <wlug(a)mail.wlug.org> >Date: Thu, 5 Apr 2001 11:10:10 -0700 >Subject: [Wlug] Filtering attachments via a Sendmail ruleset? > >Hey Guys, > > Really simple question here... A while back I had asked whether = >sendmail could filter out mail based on a subject header , and found out = >that it could. Now I have a situation here at work where we want to = >filter out attachments, the obvious being .vbs, .exe, basically anything = >that may contain a virus. We don't run anti-virus software on the mail = >server that mail is being delivered to, nor on the sendmail relays = >feeding into it, since they are Solaris boxes and we currently don't = >have a unix version of Norton lying about. But I believe that we can = >filter out attachments through a sendmail ruleset, and I am wondering if = >this is the case. If so, can someone tell me how/where to do it please? = > Would be very appreciative for any help here! Thanks in advance! What we do here is use procmail on our local, internal mail server. There's a great filtering set of procmail rules for this located at: http://www.impsec.org/email-tools/procmail-security.html As long as you have procmail installed and sendmail is configured to use procmail, just drop this stuff in place and you'll instantly start filtering stuff based on content and/or extension. There's a lot of configuration and customization you can do with this thing, and we've found that it works fantastic. We've intercepted the "AnnaKournikova" virus many, many times since it's initial release, and I can't even count the number of other virii I've seen trapped since we installed this. HTH, Seeya, Paul -- Paul Lussier Chairman, Nashua Chapter, GNHLUG Senior Systems and Network Engineer Mission Critical Linux, Inc.

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Filtering attachments via a Sendmail ruleset?
by Dave Coutu 05 Apr '01

05 Apr '01

Hey Guys, Really simple question here... A while back I had asked whether sendmail could filter out mail based on a subject header , and found out that it could. Now I have a situation here at work where we want to filter out attachments, the obvious being .vbs, .exe, basically anything that may contain a virus. We don't run anti-virus software on the mail server that mail is being delivered to, nor on the sendmail relays feeding into it, since they are Solaris boxes and we currently don't have a unix version of Norton lying about. But I believe that we can filter out attachments through a sendmail ruleset, and I am wondering if this is the case. If so, can someone tell me how/where to do it please? Would be very appreciative for any help here! Thanks in advance! Dave

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Volunteers needed!
by Andy Stewart 05 Apr '01

05 Apr '01

HI gang, I have been asked to be the guest speaker at the Delphi Developers Group meeting in Newton, MA on Monday, April 23rd (http://www.discom.com/delphi) They are interested in Linux due to the recent product announcement of Borland Kylix (http://www.borland.com/kylix) These folks are a group of software developers living in the Windows world. I had planned to prepare a 45 - 60 minute talk, Q/A, and then demonstrate some apps for them, such as: StarOffice Netscape Developer tools and utilities VmWare LILO Desktops - KDE, Gnome, enlightenment, etc. Installation of Linux The above list was suggested to me by their representative as a list of things that would be interesting to their developers group. I am seeking 2 or 3 people would like to volunteer to demo some of these tools at the meeting, and who can provide support for the questions which I can't answer. I'm looking for folks with systems or laptops that they are willing to bring to this meeting for the demos. I would also appreciate a volunteer or two who would be willing to critique my presentation slides before the meeting. You would not need to actually attend the meeting. I'd e-mail the slides to you and request your written feedback. The Delphi group representative will also get a sneak preview. If you are interested in either of these opportunities, please contact me this week if at all possible. Thanks in advance! Andy -- Andy Stewart, Founder -o) | Harris's Lament: All the good ones are Worcester Linux Users' Group /\ | taken. Worcester, MA, USA _\_v | http://www.wlug.org |

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RE: [Wlug] Friendly ISP in Worcester
by Keller, Tim 04 Apr '01

04 Apr '01

Well, I'm only on dialup and I've been using Erols (Its actually RCN) and I've had extremely good luck with them. Like everything, your mileage may very... Tim. -----Original Message----- From: Rodrigo Gomes [mailto:gomes_k@dr.com] Sent: Wednesday, April 04, 2001 5:18 PM To: wlug(a)mail.wlug.org Subject: [Wlug] Friendly ISP in Worcester I would like to know names and url of lnx friendly ISP's in Worcester area. Thanks in advance. ______________________________________________ FREE Personalized Email at Mail.com Sign up at http://www.mail.com/?sr=signup _______________________________________________ Wlug mailing list Wlug(a)mail.wlug.org http://mail.wlug.org/mailman/listinfo/wlug

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Re: [Wlug] Friendly ISP in Worcester
by Richard H Fox 04 Apr '01

04 Apr '01

I've used AT&T Worldnet with great success - much faster than other dialups... yes, the big mega-ISP but with Linux loving employees who I've spoken with for server / network related issues... how Linux friendly is AT&T??? Visit: http://www.wurd.com/eng/setup/dialers/index.htm There's other Linux stuff on the AT&T WURD site ( http://www.wurd.com ) - but I think this is what you are looking for... OH! if you want to sign up for a Linux account use this method: https://registration.att.net/cgi-bin/inregister Hit the CONTINUE REGISTRATION button - the nine-character Registration Code is not needed... The only way to avoid downloading the Wintel or MAC dialer to setup an AT&T account is through this page... and AT&T customer (tech) support forwarded me a Linux guy (Debian his preference though he runs Mandrake on one of his machines) who gave me the link, only available by direct reference... Best... Richard ----- Original Message ----- From: "Rodrigo Gomes" <gomes_k(a)dr.com> To: <wlug(a)mail.wlug.org> Sent: Wednesday, April 04, 2001 5:17 PM Subject: [Wlug] Friendly ISP in Worcester I would like to know names and url of lnx friendly ISP's in Worcester area. Thanks in advance. ______________________________________________ FREE Personalized Email at Mail.com Sign up at http://www.mail.com/?sr=signup _______________________________________________ Wlug mailing list Wlug(a)mail.wlug.org http://mail.wlug.org/mailman/listinfo/wlug

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Friendly ISP in Worcester
by Rodrigo Gomes 04 Apr '01

04 Apr '01

I would like to know names and url of lnx friendly ISP's in Worcester area. Thanks in advance. ______________________________________________ FREE Personalized Email at Mail.com Sign up at http://www.mail.com/?sr=signup

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Firewalls
by Michael Long 03 Apr '01

03 Apr '01

After spending many hours this past week trying to understand ipchains and firewalling in general I have come to the conclusion that I am spending a lot of time trying to recreate something that probably already exists. Does anyone have any experience with either open source or commercial firewalling products that can be configured to work in a small office network and allow VPN connections to larger networks. I do not have a very big budget but would be willing to pay for the appropriate solution. Mike

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Startup issues
by Michael Long 02 Apr '01

02 Apr '01

I have been playing with my network settings today and have made a change that has caused my system to be unable to read this file during boot up. Also any script that tries to read from it is unable to. Unfortunately I have no idea what I did to cause this. The following is the out put from 'ls -l' -rw-r--r-- 1 root root 235 Jan 30 19:59/ etc/rc.config.d/idedma.rc.config I am running SuSE 7.0. Thanks, mike

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Richard Stallman will be speaking at Holy Cross
by Andy Stewart 23 Mar '01

23 Mar '01

Hi WLUG members, Richard Stallman will be speaking at Holy Cross soon. See the details below in an e-mail which I recently received. Later, Andy -- Andy Stewart, Founder -o) | Being stoned on marijuana isn't very Worcester Linux Users' Group /\ | different from being stoned on gin. -- Worcester, MA, USA _\_v | Ralph Nader http://www.wlug.org | -------- Original Message -------- Subject: GNU/Linux Event at Holy Cross Date: Thu, 22 Mar 2001 14:51:33 -0500 (EST) From: Andrew Hwang <ahwang(a)mathcs.holycross.edu> Reply-To: Andrew Hwang <ahwang(a)mathcs.holycross.edu> To: astewart(a)world.std.com As part of an ongoing series of talks on Computer Science and Ethics, Richard Stallman of the Free Software Foundation will be speaking on Wednesday, April 18, at the College of the Holy Cross. The title of his talk is "The Free Software movement, and the GNU/Linux operating system" The talk will start at 3:30 and will run for about 2 hours (including Q&A). The location is 112 O'Neill Hall. The event is open to the public, and GNU software will be for sale. If you have questions about this event, please send me email at the address below. Hope to see you there! Andrew D. Hwang ahwang(a)mathcs.holycross.edu Department of Math and CS http://mathcs.holycross.edu/~ahwang College of the Holy Cross (508) 793-2458 (Office: 331 Swords Hall) Worcester, MA, 01610 (508) 793-3530 (fax)

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Help with NIS
by Leon Do 19 Mar '01

19 Mar '01

I have my NIS server running on a redhat box. Can somebody help me how to setup my win machines to use linux NIS server? Thanks -- Leon Do

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Problems
by Doctor Orbitz 16 Mar '01

16 Mar '01

I have Slackware 7.1 running on a an AMD 133Mhz box with 32Megs RAM. This is my webserver, shell server, Ip MASQ box, and it locks up alot. It seems to lock up when I'm downloading on a box in my network behind it. I am runnign Kernel 2.4.0 on an ADSL line. I have had this problem with all kernel compiles I have done. I used to run FreeBSD, then OpenBSD on this box with no trouble. I did not, however, have ADSL then, so those boxes were just using a dial-up. I think IP MASQ is lockign the box up at some point. There are no messages in /var/log/messages, it just stops cold. My PPPOE client, when running top, never appears to use more than 10% of my CPU. I do not think the problem is in the pppoe client because the box does not seem to lock up when I'm downloading on it. (as in ssh'ing in and using lynx). Does anyone have any ideas on this? Orbitz

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Looking for someone to assist in setting up a server
by David Dondero 15 Mar '01

15 Mar '01

Hello all, My name is David Dondero and I am looking for someone who can help me set up a Red Hat Linux server that can: Use the apache webserver to set up hosting customer's webpages as well as my own Run RealServer basic for streaming audio and video live and on demand Run Darwin Streaming server for streaming audio and video live and on demand in QuickTime Run a Shoutcast server for live audio streaming I currently have a Duron 650 with a 15 and 20 gig hard drive 7200rpm with 128 megs of PC100 memory. Anyone interested please get in touch by either e-mail: daviddondero(a)radio521.com or phone H) 781-934-7978 W) 781-934-7035 thanks, David Dondero

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REMINDER: Meeting on Wednesday, March 14th at 7 PM
by Andy Stewart 13 Mar '01

13 Mar '01

HI everyone, This is a friendly reminder: the next WLUG meeting will be held on Wednesday, March 14th at 7 PM in Kinnicutt Hall at WPI in Worcester, MA. Directions can be found on the WLUG website: http://www.wlug.org WLUG members Doug Waud, Stephen Daukas, and Chuck Anderson have been working together on the presentation for this meeting (at least that's the story I've been given). They will be discussing their experiences with home networking. Check out the WLUG website for a more detailed description of the focus of their talk. I expect that this will be a good meeting for someone who might not have setup a home network but is considering it. After the presentation, if time allows, we'll open the floor for a general question and answer session. At the conclusion of the meeting, a group of us will head over to the Boynton Restaurant for some pizza and beer. As always, the meeting and the post-meeting festivities are open to anybody who is interested in Linux. No secret handshake is required. :-) See ya later, Andy -- Andy Stewart, Founder -o) | Aquadextrous, adj.: Possessing the Worcester Linux Users' Group /\ | ability to turn the bathtub faucet on and Worcester, MA, USA _\_v | off with your toes. -- Rich Hall, http://www.wlug.org | "Sniglets"

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Open Source XML Programming Tutorial
by Steve Litt 07 Mar '01

07 Mar '01

Hi all, Because most XML books and websites force the you to recite Microsoft incantations, I wrote an all Open Source XML programming tutorial using Linux and Xerces-Java from Apache Software Foundation. It thoroughly covers coding of DOM, SAX, and DTD's. http://www.troubleshooters.com/tpromag/200103/200103.htm Enjoy! SteveT Steve Litt Webmaster, Troubleshooters.Com http://www.troubleshooters.com slitt(a)troubleshooters.com

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Set Date/Time
by Peter Nikolla 05 Mar '01

05 Mar '01

I would like to thank everyone that helped me with the setting of date/time. I think the hwclock command did the trick. thanx Peter N.

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Set Date/Time
by Peter Nikolla 04 Mar '01

04 Mar '01

Hi, I am having a problem setting the date/time on my Linux box. I set it using date 030310152001 for 3/3/2001 10:15. Everyting seems fine until I reboot the box. At that time it changes to some other time. I checked my CMOS and the time is correct. What am I doing wrong? thanx for your help. Peter N.

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UNIX Developer Positions
by B.J. Herbison 02 Mar '01

02 Mar '01

HighGround Systems has a couple of positions open for experienced UNIX developers. Our current storage resource management products support several versions of UNIX, and we expect to do more UNIX work when our purchase by Sun Microsystems is completed. Two of the current positions have UNIX in the title, but most of the open positions list UNIX as a relevant technology. Please send me your resume if you are interested in one of the positions. B.J. Employment: http://www.highground.com/employment/default.htm Career Opportunities: http://www.highground.com/employment/careers.htm Principal Engineer UNIX Developer: http://www.highground.com/employment/careers.htm#pe_unixd Principal Engineer - Senior UNIX Developer: http://www.highground.com/employment/careers.htm#two -- B.J. Herbison / bj(a)herbison.com / http://www.herbison.com/herbison/bj.html The Next Asylum / 203 Long Hill Road / Bolton, MA 01740-1421 / +1 978 634-1061

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Cable Modem
by Bill Mills-Curran 01 Mar '01

01 Mar '01

I'm about to take the plunge and get hooked up to Charter Cable for internet access. Does anyone have any experience/recommendations for cable modems? Is it better to buy my own, and from where? TIA, Bill

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UNIX Admin position
by Ritacco, Alan 01 Mar '01

01 Mar '01

I was very successful last time in mailing this list when I was looking for a UNIX (Solaris) admin [about a year ago I sent a similar message in which Adam responded and has been working at UMASS since]. I am now again looking to fill a UNIX admin position at UMASS Medical School (in Worcester). If you know anyone and or you are interested please email me your resume and I will forward it to the powers to be. Thanks And sorry for the spam :) Al

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Re: [Wlug] Cable Modem
by Thomas Carey 28 Feb '01

28 Feb '01

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Re: [Wlug] Network problem: mine or theirs?
by ccb＠acm.org 26 Feb '01

26 Feb '01

Hmmm. Perhaps they have a proxy in-line and the proxy is having trouble. ccb -- Charles C. Bennett, Jr. VA LiNUX Systems Systems Engineer, Northeast US 25 Burlington Mall Rd., Suite 300 +1 617 543-6513 Burlington, MA 01803-4145 ccb(a)valinux.com www.valinux.com

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Network problem: mine or theirs?
by Andy Stewart 24 Feb '01

24 Feb '01

Hi all, I have a problem accessing the Internet. On precisely every other attempt, I get failures. For example, every other unique URL I click in Netscape gives me the following error: A network error occurred while Netscape was receiving data. (Network error: connection reset by peer) Try connecting again. I suspect that my network provider's DNS server is having problems. Since I'm a DHCP client of AT&T Broadband, I tried removing all but one of the nameserver lines in the /etc/resolv.conf file to see if one of them was flaky. After trying all 3 provided nameservers uniquely, either this isn't the problem, or they're all flaky. Any thoughts? Thanks, Andy -- Andy Stewart, Founder -o) | It is easier to change the specification Worcester Linux Users' Group /\ | to fit the program than vice versa. Worcester, MA, USA _\_v | http://www.wlug.org |

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PPPD 2.3.11 on kernel 2.4.1
by Peter Gutowski 23 Feb '01

23 Feb '01

I've got kernel 2.4.1 up and running and am pleased that all seems to be relatively well. My boss has an iMac at home and dials in via a ppp connection to one of my linux boxes running now 2.4.1. I've played with various ppp options and have removed just about everything from the /etc/ppp/options file. Feb 23 11:37:15 lx1 pppd[10485]: pppd 2.3.11 started by a_ppp, uid 0 Feb 23 11:37:15 lx1 pppd[10485]: ioctl(PPPIOCGFLAGS): Invalid argument Feb 23 11:37:15 lx1 pppd[10485]: tcsetattr: Invalid argument Feb 23 11:37:15 lx1 pppd[10485]: Exit. Here's the current modules: (root on lx1) peterg # lsmod Module Size Used by iptable_mangle 1884 0 (unused) iptable_filter 1848 0 (unused) ip_tables 13016 2 [iptable_mangle iptable_filter] slip 5688 0 (unused) bsd_comp 4172 0 (unused) ppp_deflate 41148 0 (unused) ppp_async 6060 0 ppp_generic 13088 0 [bsd_comp ppp_deflate ppp_async] slhc 4836 0 [ppp_generic] 3c59x 23420 2 (autoclean) agpgart 21900 0 (unused) I also happened to read something this morning on lwn.net (http://lwn.net/2001/0222/kernel.php3) that suggested that certain ppp things weren't working because the MTU min size was higher than ppp wanted to set. As it suggested i've done: `echo 256 > /proc/sys/net/ipv4/route/min_adv_mss` to no avail! I keep suggesting (lately increasingly less subtly) that he consider a cable modem but so far he still wants to do it this way. Any ideas? -- Peter Gutowski peterg(a)powervue.com http://www.powervue.com/~peterg

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To: wlug.org message board manager
by Alexander S. Leon 22 Feb '01

22 Feb '01

The postings on the message board at wlug.org have the wrong year attached to them. I posted a message on 2/21/01, and the date on it is "2/21/00", instead of "2/21/01". This ought to be corrected. I hope this gets to the right person...

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ssh
by Brad Noyes 20 Feb '01

20 Feb '01

Hi, When i pop my mail i create a tunnel through ssh, and pop through that. Using this command "ssh -C -f me(a)pop.myserver -L 10110:pop.myserver:110 sleep 30" Well every time i create the tunnel i have to enter my password for the pop server. Is there a way to use ssh tools so i don't have to enter my password? I'm using kmail is that's relevant. Thanks, --Brad

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