IpConfig/Greylisting Registry Key
NAME
IpConfig/Greylisting
DEFAULT
Disabled
DESCRIPTION
Greylisting is a technique that has been utilized by email servers with great
success in limiting the level of SPAM email. JANOS can use a similar approach
to greatly reduce the number of unwanted external connections. When the
IpConfig/Greylisting registry key is set to
enabled any initial TCP/IP
connection request (SYN) is ignored and considered to be
Noise. The connection
will be accepted when the client properly retries. The concept here being
that bots and malicious actors pushing volumes of connection attempts do not
take the time to retry nor do so in any normal way.
When Greylisting is in use your connections continue to function since the
browser and other applications that we use all adhere to standards, use the
standard built-in network stack and retry properly.
NOTES
Greylisting when used on a JNIOR connected directly to the Internet has proven
to eliminate over 90% of the illicit login attempts.
SEE ALSO
HELP Topics:
NETSTAT,
IpConfig/Blacklist
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