Gentoo Archives: gentoo-server

From: Ben Munat <bent@×××××.com>
To: gentoo-server@l.g.o
Subject: Re: [gentoo-server] alarming vpopmail log entries
Date: Sat, 13 Nov 2004 05:55:37
Message-Id: 4195A2A9.6050302@munat.com
In Reply to: Re: [gentoo-server] alarming vpopmail log entries by Richard Yumul
1 Thought I should send an epilogue on this one... turned out that my
2 brother had set up his (and several family members') laptops to use the
3 postmaster account to send mail! He goes from coffee shop to coffee shop
4 every day, so -- along with the other people who were sending using
5 postmaster -- that explains the varying IP addresses.
6
7 Not sure why he used postmaster, but at least it wasn't something nefarious.
8
9 b
10
11
12
13
14 Richard Yumul wrote:
15
16 > Based on your log entries, it looks like somebody discovered your
17 > 'postmaster@×××××.com' password and is using it to relay messages.
18 >
19 > Did you check your qmail-send log around the same time? It would have
20 > more details, showing if it's relaying emails.
21 >
22 > You also might try changing your postmaster's password to something
23 > really cryptic, & see if those log entries still appear.
24 >
25 > HTH,
26 > Rich Yumul
27 >
28 >
29 > Ben Munat wrote:
30 >
31 >> I posted the following on the weekend and it seems to have been
32 >> overlooked. If no one really has any ideas, I'm sorry for the repost,
33 >> but, I would think that someone here has used vpopmail... I'm really
34 >> hoping that this is something that vpopmail puts in the logs normally!
35 >>
36 >> Here's my previous post:
37 >>
38 >> Finally got around to installing a log monitoring tool (logwatch) this
39 >> morning. I'm not sure why it doesn't give me any output for any services
40 >> other than syslogd (maybe cuz all the other services are dumping into
41 >> /var/log/messages?), but while looking through /var/log/messages for
42 >> stuff that logwatch might find, I saw something that made my heart skip
43 >> a beat.
44 >>
45 >> There are a number of vpopmail entries like this:
46 >>
47 >> Nov 6 10:21:51 munat vpopmail[29101]: vchkpw-smtp: password fail
48 >> postmaster@×××××.com:80.104.163.225
49 >> Nov 6 10:21:57 munat vpopmail[29103]: vchkpw-smtp: (PLAIN) login
50 >> success postmaster@×××××.com:80.104.163.225
51 >>
52 >> Always in pairs like that... mostly with different addresses, and
53 >> addresses that I don't recognize. My brother and I are the only people
54 >> who should be able to log into the postmaster account, and we rarely do
55 >> so, so...
56 >>
57 >> The question is, has my vpopmail been hacked or is this somehow a
58 >> typical vpopmail occurrence? Going back through messages, there are
59 >> entries like this every day. So maybe, for some strange reason vpopmail
60 >> prints this entry in the logs periodically?
61 >>
62 >> Ben
63 >>
64 >>
65 >>
66 >>
67 >
68 > --
69 > ------------------------------------------------------------------------
70 > Richard M Yumul
71 > rmy@×××××××××.com <mailto:rmy@×××××××××.com>
72 > SDTechnix
73 > http://www.sdtechnix.com
74 > ------------------------------------------------------------------------