Re: [asterisk-biz] Fraud. (here we go again)

Hey what wrong with Hong Kong. I don't believe you will have a lot of ports
scan or dictionary attacks from Hong Kong. China yes may be. But Come on..
You will be more likely to get port scan from a network like ev1 which from
Hong Kong. Or at least may be 5 times as much.

If you read the statistic, most hacks attempts or scam attempts are from
China, Africa(not a lot of hack attempts), Russia, USA <---yes my friend USA
too, you really won't see a lot from Vietnam (their broadband go down every
afternoon for a few hrs and bw price is rocket high), Thailand (they are
paying like close to $400 -1000 USD per mb so you think they will use it to
port scan you ?)

Just my 2 cent
Sam

-----Original Message-----
From: asterisk-biz-bounces@lists.digium.com
[mailto:asterisk-biz-bounces@lists.digium.com] On Behalf Of Alex Balashov
Sent: Tuesday, August 19, 2008 1:57 PM
To: nk3569@yahoo.com; Commercial and Business-Oriented Asterisk Discussion
Subject: Re: [asterisk-biz] Fraud. (here we go again)

Maybe an overly shotgun approach for your tastes, but I personally
firewall off all IP blocks from APNIC (the Asian-Pacific RIR) delegated
to the southeast Asian countries (China, Korea, Vietnam, Thailand, Laos,
Hong Kong -- yes, I know it is not a country). Over 90% of my port
scans, my dictionary attacks and my problems seem to come from there.

If you take that approach, definitely don't block all the aggregate
APNIC ranges. That would exclude quite a few Australians and New
Zealanders.

There are plenty of lists available online reliably of the blocks
delegated by country, with a specific focus on that region. It is not
an uncommon practise among sysadmins.

--
Alex Balashov
Evariste Systems
Web : http://www.evaristesys.com/
Tel : (+1) (678) 954-0670
Direct : (+1) (678) 954-0671
Mobile : (+1) (706) 338-8599

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