A long time back, we found that none of our products and services are applicable to the Chinese and Korean market. However my mail servers continued to get a lot of spam from these sources – which was weird!

At some point I came across Okean (www.okean.com)  and started using their list to prevent access from such sources. I find it works great; and here’s the NETSH command used to perform the block on a windows box:

netsh advfirewall firewall add rule name="IP Block" dir=in interface=any action=block remoteip=x.x.x.x/32

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About Chaitanya Dhareshwar

Chaitanya Dhareshwar, a Technocrat | CIO.

Member of various key technology and management organizations (IETF, ISOC, CSI)
with 14 years of technology management & advisory experience
has transformed companies from "stone age" to "space age". I build high-scale, self-sustaining, self-service platforms. Passionate about technology, innovation and creating killer opportunities that only great tech can bring. I've led teams from 5 - 150 people, and am hands-on with all forms of technology.

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