Re: New OpenBSD mirror in Korea

On 12/06/06, Jaeho Shin <[email protected]> wrote:
> 2006/6/13, Constantine A. Murenin <[email protected]>:
> > Why do you guys never put reverse records on your IPs? :)
> >
> > ...
> > 16  * global.hgc.com.hk (218.189.8.181)  339.547 ms  260.786 ms
> > 17  global.hgc.com.hk (218.189.12.214)  273.599 ms  270.873 ms  269.926 ms
> > 18  adsl02997.usr.hananet.net (210.94.29.97)  272.123 ms  271.498 ms  271.69 ms
> > 19  218.39.19.2 (218.39.19.2)  278.608 ms  276.444 ms  275.516 ms
> > 20  211.117.1.74 (211.117.1.74)  412.867 ms  384.72 ms  460.869 ms
> > 21  218.236.231.86 (218.236.231.86)  293.44 ms  297.117 ms  294.487 ms
> > 22  143.248.117.1 (143.248.117.1)  298.787 ms  301.289 ms  296.360 ms
> > 23  143.248.117.83 (143.248.117.83)  301.979 ms  294.566 ms  295.116 ms
> > 24  ftp.kaist.ac.kr (143.248.234.110)  290.426 ms  295.241 ms  296.969 ms
>
> Hi Constantine,
>
> Actually, that's what we are also curious about. :(
> Unfortunately, we don't have any permissions over the network management.
> We are just a group of people who manage the mirroring service.
>
> I guess the network guys are simply too lazy to label them, or suffering
> from worms and viruses all the time.  One big reason must be this: most
> of our major ISPs use lots of C class networks, and that might make the
> PTR management a little more annoying or something.  However, since our
> campus uses a B class, we don't fall into this case.  Sorry for the poor
> address/name management here.  We hope things get better soon..

Some people that don't have even C class networks still manage to get
their PTRs across. See RFC 2317, "Classless IN-ADDR.ARPA delegation".
Look, you even have it at your RFC mirror, could you possibly spread
more words about it? :)

http://ftp.kaist.ac.kr/pub/rfc/rfc2317.txt

> One more comment.  I couldn't send a single message to you because your
> mail server blocked ours for being in Korea.  So, I decided to compose
> messages in Gmail to reach you folks.  I know lots of spam were relayed
> thru Korea in the past, and understand spam is really a critical threat.
> But we've worked a lot on spam problems and I couldn't believe such
> blocking still exists these days.  It's really sad when you cannot
> email someone over the Internet.

I'm actually surprised to see your message on this list for the very
same reasons that KR IP-addresses are blocked.

http://www.openbsd.org/spamd/

Whilst it is indeed sad that Internet communication is disrupted in
such ways, there is simply no other way to stop spam coming from KR
networks, most of which still lack any PTR records of any sort, so no
"smart-filtering" of dynamic IP-addresses is ever possible, thus
usually all IP-addresses have to be blocked. And this problem is not
in the past, unfortunately, it's still happening today.

> Anyway, are we getting added to the list?

I'm just a subsciber of this www@openbsd public mailing list, so I
have no answer to this question. :)

Cheers,
Constantine.