On Thu, 10 Jul 2003 12:33:54 +0900, alan premselaar wrote
> On 7/10/03 11:48 AM, "Mike Vanecek" <[EMAIL PROTECTED]> wrote:
> 
> ...snip...
> > 
> > [EMAIL PROTECTED] admin]$ whois uchuu.12inch.com
> > BW whois 3.4 by Bill Weinman (http://whois.bw.org/)
> > Copyright 1999-2003 William E. Weinman
> > Request: uchuu.12inch.com
> > whois server for *.com is whois.crsnic.net ...
> > connected to whois.crsnic.net [198.41.3.54:43] ...
> > 
> > No match for "UCHUU.12INCH.COM".
> >
> 
> whois 12inch.com would have given you the appropriate information. 
> (as 12inch.com is the domain, and uchuu is a particular host in the 
> domain)

Yes, I missed that one, sorry. 

[snip]

> I was sending mail in reply to one of your posts on the list.  I typically
> use "Reply all" which will reply to the list and also send a copy directly
> to the sender.  My mail logs only show it trying every 4 minutes,
>  but even that is strange.

I suspect that what we are seeing is some form of syn requests from sendmail??

For example, I am now receiving the same sort of activity from another jp site:

Jul  9 09:00:34 www kernel: Asia2 IN=eth0 OUT=
MAC=00:d0:09:3d:69:81:00:04:5a:ef:5e:1d:08:00 SRC=202.12.30.137
DST=192.168.1.95 LEN=60 TOS=0x00 PREC=0x00 TTL=238 ID=61693 DF PROTO=TCP
SPT=25 DPT=57653 WINDOW=10136 RES=0x00 ACK SYN URGP=0
Jul  9 09:00:37 www kernel: Asia2 IN=eth0 OUT=
MAC=00:d0:09:3d:69:81:00:04:5a:ef:5e:1d:08:00 SRC=202.12.30.137
DST=192.168.1.95 LEN=52 TOS=0x00 PREC=0x00 TTL=238 ID=61694 DF PROTO=TCP
SPT=25 DPT=57653 WINDOW=10136 RES=0x00 ACK URGP=0
Jul  9 09:00:38 www kernel: Asia2 IN=eth0 OUT=
MAC=00:d0:09:3d:69:81:00:04:5a:ef:5e:1d:08:00 SRC=202.12.30.137
DST=192.168.1.95 LEN=60 TOS=0x00 PREC=0x00 TTL=238 ID=61695 DF PROTO=TCP
SPT=25 DPT=57653 WINDOW=10136 RES=0x00 ACK SYN URGP=0
Jul  9 09:00:43 www kernel: Asia2 IN=eth0 OUT=
MAC=00:d0:09:3d:69:81:00:04:5a:ef:5e:1d:08:00 SRC=202.12.30.137
DST=192.168.1.95 LEN=52 TOS=0x00 PREC=0x00 TTL=238 ID=61696 DF PROTO=TCP
SPT=25 DPT=57653 WINDOW=10136 RES=0x00 ACK URGP=0
....
Jul 10 08:55:44 www kernel: Asia2 IN=eth0 OUT=
MAC=00:d0:09:3d:69:81:00:04:5a:ef:5e:1d:08:00 SRC=202.12.30.137
DST=192.168.1.95 LEN=52 TOS=0x00 PREC=0x00 TTL=238 ID=34124 DF PROTO=TCP
SPT=25 DPT=59292 WINDOW=10136 RES=0x00 ACK URGP=0
Jul 10 08:55:46 www kernel: Asia2 IN=eth0 OUT=
MAC=00:d0:09:3d:69:81:00:04:5a:ef:5e:1d:08:00 SRC=202.12.30.137
DST=192.168.1.95 LEN=60 TOS=0x00 PREC=0x00 TTL=238 ID=34125 DF PROTO=TCP
SPT=25 DPT=59292 WINDOW=10136 RES=0x00 ACK SYN URGP=0
Jul 10 08:56:08 www kernel: Asia2 IN=eth0 OUT=
MAC=00:d0:09:3d:69:81:00:04:5a:ef:5e:1d:08:00 SRC=202.12.30.137
DST=192.168.1.95 LEN=52 TOS=0x00 PREC=0x00 TTL=238 ID=34126 DF PROTO=TCP
SPT=25 DPT=59292 WINDOW=10136 RES=0x00 ACK URGP=0
Jul 10 08:56:12 www kernel: Asia2 IN=eth0 OUT=
MAC=00:d0:09:3d:69:81:00:04:5a:ef:5e:1d:08:00 SRC=202.12.30.137
DST=192.168.1.95 LEN=60 TOS=0x00 PREC=0x00 TTL=238 ID=34127 DF PROTO=TCP
SPT=25 DPT=59292 WINDOW=10136 RES=0x00 ACK SYN URGP=0
Jul 10 08:56:56 www kernel: Asia2 IN=eth0 OUT=
MAC=00:d0:09:3d:69:81:00:04:5a:ef:5e:1d:08:00 SRC=202.12.30.137
DST=192.168.1.95 LEN=52 TOS=0x00 PREC=0x00 TTL=238 ID=34128 DF PROTO=TCP
SPT=25 DPT=59292 WINDOW=10136 RES=0x00 ACK URGP=0
Jul 10 08:57:03 www kernel: Asia2 IN=eth0 OUT=
MAC=00:d0:09:3d:69:81:00:04:5a:ef:5e:1d:08:00 SRC=202.12.30.137
DST=192.168.1.95 LEN=60 TOS=0x00 PREC=0x00 TTL=238 ID=34129 DF PROTO=TCP
SPT=25 DPT=59292 WINDOW=10136 RES=0x00 ACK SYN URGP=0
Jul 10 08:58:03 www kernel: Asia2 IN=eth0 OUT=
MAC=00:d0:09:3d:69:81:00:04:5a:ef:5e:1d:08:00 SRC=202.12.30.137
DST=192.168.1.95 LEN=60 TOS=0x00 PREC=0x00 TTL=238 ID=62547 DF PROTO=TCP
SPT=25 DPT=59292 WINDOW=10136 RES=0x00 ACK SYN URGP=0

Notice it is from port 25 to a high numbered port and at a fairly high repeat
rate.

[EMAIL PROTECTED] admin]$ host  202.12.30.137
137.30.12.202.in-addr.arpa domain name pointer mx1.nic.ad.jp.

I guess this one is nic.ad.jp trying to tell me that the problem has stopped?

I think I will enable that ip address and see what happens.

> > The reason I posted it on this list was that I was wondering if it was some
> > form of DOS spam attack and that the people on this list would be the most
> > likely to have a heads up on such a situation.
> 
> I'm glad you posted on the list, otherwise i wouldn't have known 
> there was a problem.
> 
> > 
> >> should anyone have any suggestions as to why this might have
> >> happened, i'd be very interested in making sure it doesn't happen again.
> > 
> > I do not use sendmail, so I cannot help you there.
> 
> suggestions/comments from anyone else on the list will also be appreciated.
> 
> alan

Thank you.



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