 | June 22nd, morning: A spammer investigates
whether our mail server is an open SMTP relay. Open
relays allow to distribute spams with increased
anonymity and allow to shift a significant part of
the load to the relay.
|
| June 22nd, evening: A T-Online user (major
dialin service in Germany) scans for FTP servers with
open security holes.
|
| June 23rd, noon: Port scan of UDP port 500
(IKE, Internet Key Exchange) coming from an US university.
|
| June 23rd, evening: A DSL user of an US ISP
scans for FTP servers with open security holes.
|
| June 24th, afternoon: A dialin user of an ISP
in the Netherlands scans for FTP servers which allow
to store illegal data.
|
| June 25th, shortly after midnight: A dialin user
from France scans for anonymous FTP servers with security
holes.
|
| June 25th, early morning: Port scan coming
from an US university on TCP port 27374 which is used
by several trojans running under Windows.
|
| Miscellaneous: 1726 blocked spams, 2003 pings from
external networks and 24 attempts to connect to the
WinGate port.
|
| All these attacks came through the firewall of our
computing center.
|
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