RE: Best approach to eradicate attacks?
- From: "Jim Harrison" <Jim@xxxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Sat, 23 Jul 2005 14:17:58 -0700
Hi Bill,
It really is this simple - if ISA warned you, it blocked it.
If you want to have a bit if fun, you can track him to the ISP and
report him to (usually) abuse@<isp.com>.
Remember to include your log entries that show him scanning you.
-------------------------------------------------------
Jim Harrison
MCP(NT4, W2K), A+, Network+, PCG
http://isaserver.org/Jim_Harrison/
http://isatools.org
Read the help / books / articles!
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-----Original Message-----
From: William Robertson [mailto:william.robertson@xxxxxxxxxx]
Sent: Saturday, July 23, 2005 12:48
To: [ISAserver.org Discussion List]
Subject: [isalist] Best approach to eradicate attacks?
http://www.ISAserver.org
I know the subject sounds a bit dubious... but I thought I'd ask some
opinion here...
When getting thousands of these alerts:
ISA Server name: <FIREWALL>
ISA Server detected an all port scan attack from Internet Protocol (IP)
address 130.239.18.137.
I know that this little w@nk3r from Amsterdam is trying to attack me on
TCP
21, because I have a Server Publishing rule allowing only 1 specific IP
address in on TCP21.
Question is, am I really safe against this guy? Surely if he knows I've
got
TCP21 open, he can just spoof enough TCP/IP Source Headers until he
guesses
the correct one and my firewall lets him in??
Is there anything else I should be doing in order to secure myself?
Thanks
William R.
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