RE: All .COM / .NET domain names now exist
http://www.hinterlands.org/ver/txt/ seems it is possible to opt out as well.. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Travis Roy Sent: Tuesday, September 16, 2003 8:18 AM To: [EMAIL PROTECTED]; Greater NH Linux User Group Subject: RE: All .COM / .NET domain names now exist This will have the immediate effect of making network trouble-shooting much more difficult. Before, a mis-typed domain name in an email address, web browser, or other network configuration item would result in an obvious error message. You might not have known what to do about it, but at least you knew something was wrong. Now, though, you will have to guess. Every time. Well, while it's not a browser error message what Verisign spits out makes it quite clear that the domain is not an owned/valid one: We didn't find: www.sadfjiasjddlksfjlaksdjflkas.com There is no Web site at this address. Some have pointed out that this will make an important anti-spam check impossible. A common anti-spam measure is to check and make sure the domain name of the sender really exists. (While this is easy to force, every little bit helps.) Since all .COM and .NET domain names now exist, that anti-spam check is useless. Can't you just check for a valid MX record? I know that's what most ISPs are doing now. host -t MX scootz.net Returns: scootz.net mail is handled by 0 mail.scootz.net. host -t MX sadfjiasjddlksfjlaksdjflkas.com Returns nothing ___ gnhlug-discuss mailing list [EMAIL PROTECTED] http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss ___ gnhlug-discuss mailing list [EMAIL PROTECTED] http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss
adm and address blocking
I find amusing that the adm account on this machine has a mailbox full of spam. Amusing tho it may be, how can I stop it from happening? Additionally, i've been getting attacked from ipt.aol.com. They own the address range from 172.128.0.0 - 172.211.255.255 What would be the netmask to block a range like that? 172.128.0.0/8 would block the entire class B, right? Thanking you in advance, Your friend, Tom Albright -- TARogue (Linux user number 234357) I do not believe that they are like the Scots or the Welsh and doubt that they ever will be. The real British interest would I think be served best by pushing them towards a United Ireland rather than tying them closer to the United Kingdom. Our own parliamentary history is one long story of trouble with Ireland. -- Sir Alex Douglas-Hume (13 March 1972) ___ gnhlug-discuss mailing list [EMAIL PROTECTED] http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss
RE: adm and address blocking
I find amusing that the adm account on this machine has a mailbox full of spam. Amusing tho it may be, how can I stop it from happening? You can use some kind of spam blocking software. Anything from spamassassin to a white-list style. Additionally, i've been getting attacked from ipt.aol.com. They own the address range from 172.128.0.0 - 172.211.255.255 What would be the netmask to block a range like that? 172.128.0.0/8 would block the entire class B, right? While blocking a whole range is what a lot of people I know do, I wouldn't, even more so if it's AOL. Eventually you will know somebody that uses AOL, or if you have users on your system they will know somebody that uses AOL. I use a combo of spamassassin and some postfix rules to block stuff (basically unreadable emails, emails with ADV: in them, or stuff about enlarging parts of ones body get dumped by postfix.. Everything else gets dumped by spam assassin). Unless you use the whitelist approach you will probably never block all spam. ___ gnhlug-discuss mailing list [EMAIL PROTECTED] http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss
RE: adm and address blocking
On Tue, 16 Sep 2003, Travis Roy wrote: I find amusing that the adm account on this machine has a mailbox full of spam. Amusing tho it may be, how can I stop it from happening? You can use some kind of spam blocking software. Anything from spamassassin to a white-list style. What if I chmod /var/spool/mail/adm to ? Additionally, i've been getting attacked from ipt.aol.com. They own the address range from 172.128.0.0 - 172.211.255.255 What would be the netmask to block a range like that? 172.128.0.0/8 would block the entire class B, right? While blocking a whole range is what a lot of people I know do, I wouldn't, even more so if it's AOL. Eventually you will know somebody that uses AOL, or if you have users on your system they will know somebody that uses AOL. This isn't about spam, this is attacks trying to break in. (Usually through port 1080.) Nor is this going to block all (or even most) of aol. This is just to keep *.ipt.aol.com away from me. Note: just ipt, not mx or any other aol thing. Spam I can filter, attacks I just kill. -- TARogue (Linux user number 234357) There are 10^11 stars in the galaxy. That used to be a huge number. But it's only a hundred billion. It's less than the national deficit! We used to call them astronomical numbers. Now we should call them economical numbers. -Richard Feynman, physicist, Nobel laureate (1918-1988) ___ gnhlug-discuss mailing list [EMAIL PROTECTED] http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss
Re: adm and address blocking
On Tue, 16 Sep 2003, Thomas M. Albright wrote: Additionally, i've been getting attacked from ipt.aol.com. They own the address range from 172.128.0.0 - 172.211.255.255 What would be the netmask to block a range like that? 172.128.0.0/8 would block the entire class B, right? 172.128.0.0/8 would select the entire class A, and would be essentially the same as 172.0.0.0/8, AFAICT - the mask is 8 bits long, encompassing therefore the first number in dotted-quad notation. A B network would have a 16-bit netmask. The range you describe is actually comprised of an amalgam of subnets of the 172.0.0.0 network, and in order to block exactly those addresses (and not inadvertently block any others, due to an overly-broad specification), you'll need to separate them out and block them individually. Network/MaskRange 172.128.0.0/10 172.128.0.0-172.191.255.255 172.192.0.0/12 172.192.0.0-172.207.288.255 172.208.0.0/14 172.208.0.0-172.211.255.255 HTH! -- Bill Mullen [EMAIL PROTECTED] MA, USA RLU # 270075 MDK 8.1 9.0 Computers make it easier to do a lot of things, but most of the things they make it easier to do don't need to be done. - Andy Rooney ___ gnhlug-discuss mailing list [EMAIL PROTECTED] http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss
