January 2007 - WLUG - wlug.mailman3.com

Possible sendmail attack?

by Dick Goodman

I have four servers on 3 different DSL lines running RedHat 7.3 with sendmail 8.11.6 I was on vacation at the time, but mid-day (13:00) on January 9th all of them started behaving wierdly. Instead of the occassional email, perhaps 95% of all incoming emails now show in the log as follows: Jan 9 09:41:17 bach sendmail[25179]: NOQUEUE: mail5.schaeffer.com [24.106.95.27] did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA Jan 11 00:02:12 bach sendmail[14018]: NOQUEUE: h11009.upc-h.chello.nl [62.194.11.9] did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA Jan 11 00:10:44 bach sendmail[14127]: NOQUEUE: bay0-omc2-s35.bay0.hotmail.com [65.54.246.171] did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA Jan 11 00:13:23 bach sendmail[14148]: NOQUEUE: root@localhost did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA Jan 11 00:13:50 bach sendmail[14151]: NOQUEUE: 84.95.106.53.cable.012.net.il [84.95.106.53] did notissue MAIL/EXPN/VRFY/ETRN during connection to MTA The first one is legitimate mail, the others appear to be spam Much of the 50K pieces/month of spam I get are being trapped at the server in this manner before even getting to my spam filters (a good thing), but while some legitimate email is getting through, some is being rejected with this kind of message. Does anyone (a) have any idea what's happening here (b) have any idea how to fix it. Need more info? Just ask. Dick

Jan. 12, 2007

Re: [Wlug] GIMP Question

by dulsi＠identicalsoftware.com

Thanks for the suggestion. For anyone who wants to attempt the same, image magic has an example of doing exactly what I described: http://www.cit.gu.edu.au/~anthony/graphics/imagick6/compare/ Quoting Mike Leo <mleo963(a)yahoo.com>: > when anyone asks for help with pictures, i always mention image magic > > http://www.imagemagick.org/script/index.php > > if the two parts are different enough, i'm sure imagemagick can > seperate them for you. > > > > ----- Original Message ---- > From: "dulsi(a)identicalsoftware.com" <dulsi(a)identicalsoftware.com> > To: wlug(a)mail.wlug.org > Sent: Wednesday, January 10, 2007 10:33:38 PM > Subject: [Wlug] GIMP Question > > Any GIMP experts here? Is there a way to extract the differences > between two images? I have an image of just a background and an image > of item on said background. I'd like to get the image of just the > item. It wouldn't be hard to write a program to do it but I figured > gimp might already have it. > > Dennis Payne > dulsi(a)identicalsoftware.com > > > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug > > > > >

Jan. 12, 2007

Re: [Wlug] GIMP Question

by Mike Leo

when anyone asks for help with pictures, i always mention image magic http://www.imagemagick.org/script/index.php if the two parts are different enough, i'm sure imagemagick can seperate them for you. ----- Original Message ---- From: "dulsi(a)identicalsoftware.com" <dulsi(a)identicalsoftware.com> To: wlug(a)mail.wlug.org Sent: Wednesday, January 10, 2007 10:33:38 PM Subject: [Wlug] GIMP Question Any GIMP experts here? Is there a way to extract the differences between two images? I have an image of just a background and an image of item on said background. I'd like to get the image of just the item. It wouldn't be hard to write a program to do it but I figured gimp might already have it. Dennis Payne dulsi(a)identicalsoftware.com _______________________________________________ Wlug mailing list Wlug(a)mail.wlug.org http://mail.wlug.org/mailman/listinfo/wlug

Jan. 11, 2007

GIMP Question

by dulsi＠identicalsoftware.com

Any GIMP experts here? Is there a way to extract the differences between two images? I have an image of just a background and an image of item on said background. I'd like to get the image of just the item. It wouldn't be hard to write a program to do it but I figured gimp might already have it. Dennis Payne dulsi(a)identicalsoftware.com

Jan. 11, 2007

Re: [Wlug] Topic for next Thursday

by John Stoffel

Adam> What about a MythTV discussion? I want to create a Linux media Adam> management/playback system and would like to hear others' Adam> experiences. I'd be interested in this, even though I've got a TiVo working very nicely at home right now. But when it dies, I'm going to want to keep the remote going, but move to MythTV. Too bad I can't make this meeting...

Jan. 9, 2007

Re: [Wlug] REMINDER: Upcoming Meeting Thurs Jan 11, 2007

by Andy Stewart

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Stephen C. Daukas wrote: > Feel the love! 8-) Let's try again..... :-) Thursday, January 11th, 2007, 7:00 PM Maybe I should go for the machine generated reminder...... Sorry for the confusion, but at least I know that people are reading the email. Later, Andy - -- Andy Stewart, Founder Worcester Linux Users' Group Worcester, MA, USA http://www.wlug.org -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (GNU/Linux) Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org iD8DBQFFo4zgHl0iXDssISsRAvz2AJ9Nd0w2+LpYrmKKvS4+ksd4IHlS4QCfZ12c c3wb1hmnNxmkVR642unASg0= =4BuH -----END PGP SIGNATURE-----

Jan. 9, 2007

Re: [Wlug] REMINDER: Upcoming Meeting Thurs Jan 7, 2007

by Stephen C. Daukas

Feel the love! 8-) > -----Original Message----- > From: wlug-bounces(a)mail.wlug.org > [mailto:wlug-bounces@mail.wlug.org] On Behalf Of Keith Wright > Sent: Tuesday, January 09, 2007 1:40 AM > To: wlug(a)mail.wlug.org > Subject: Re: [Wlug] REMINDER: Upcoming Meeting Thurs Jan 7, 2007 > > > > From: Andy Stewart <andystewart(a)comcast.net> > > > > This is your monthly reminder (hand generated) regarding > our upcoming > > I don't know what calendar your hand has. According to > EMACS Jan 7, 2007 was last Sunday. (But congratulations > on getting the year right.) > > -- Keith > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug >

Jan. 9, 2007

Re: [Wlug] REMINDER: Upcoming Meeting Thurs Jan 7, 2007

by Keith Wright

> From: Andy Stewart <andystewart(a)comcast.net> > > This is your monthly reminder (hand generated) regarding our upcoming I don't know what calendar your hand has. According to EMACS Jan 7, 2007 was last Sunday. (But congratulations on getting the year right.) -- Keith

Jan. 9, 2007

Re: [Wlug] REMINDER: Upcoming Meeting Thurs Jan 7, 2007

by Eric Stein

Andy Stewart wrote: > This is your monthly reminder (hand generated) regarding our upcoming > WLUG meeting, to be held on Thursday, January 7th, 2007, at 7:00 PM in > the Access Grid Room on the WPI campus in Worcester, MA USA. > Isn't Thursday the 11th? Eric

Jan. 9, 2007

REMINDER: Upcoming Meeting Thurs Jan 7, 2007

by Andy Stewart

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 HI Everybody, This is your monthly reminder (hand generated) regarding our upcoming WLUG meeting, to be held on Thursday, January 7th, 2007, at 7:00 PM in the Access Grid Room on the WPI campus in Worcester, MA USA. Many of you have suggested some good topics in our recent email threads. I propose that this meeting be a round table discussion of those and any other topics of interest. I'll bring my new laptop for discussion as well. It is a Linux Certified LC2464T running Kubuntu. However, I hope somebody has a DVI-SVGA adapter which I can borrow for the meeting, since I don't yet have one. Since this is my first experience with a Debian type of distribution, I could offer my first impressions. More info here: http://www.linuxcertified.com/linux-laptop-lc2464t.html If the discussion runs dry, ask me if I passed my Amateur Radio technician exam (which I'm taking on Wednesday). I'm curious to see what I can do with this and Linux. I can also give an update on the kernel device driver that I'm writing for the Delcom USB I/O demo board. I am planning to do a full presentation on this sometime soon, after I get more stuff working. A couple of simple features are working right now. Perhaps I'll do this for either the February or March meeting. More info here: http://www.delcom-eng.com/productdetails.asp?productnum=802004 As always, we'll adjourn to the Tech Pizza Restaurant on Highland Street for some discussion afterwards. All are welcome to attend! See ya later, and Happy New Year! Andy - -- Andy Stewart, Founder Worcester Linux Users' Group Worcester, MA, USA http://www.wlug.org -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (GNU/Linux) Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org iD8DBQFFowvsHl0iXDssISsRArxgAJoCdu40R3NGK/cVkRPAomzSSZJcCQCfZ7Sx JYMDiYEQjmETv2GfHbbbDqY= =iIYN -----END PGP SIGNATURE-----

Jan. 9, 2007