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43 lines
921 B
Lua
43 lines
921 B
Lua
--- Checks if SMTP is running on a non-standard port. This usually indicates
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-- crackers or script kiddies have set up a backdoor on the system
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-- to send spam or control your machine.
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--@output
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-- 22/tcp open ssh\n
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-- |_ Warning: smtp is running on a strange port.\n
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id = "Unexpected SMTP"
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description = "\
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If smtp is running on a strange port\
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there be a backdoor set up by crackers to send spam\
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or even control your machine."
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author = "Diman Todorov <diman.todorov@gmail.com>"
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license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
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categories = {"malware"}
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portrule = function(host, port)
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if
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( port.number ~= 25
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and
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port.number ~= 465
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and
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port.number ~= 587
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and
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port.service == "smtp" )
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and port.protocol == "tcp"
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and port.state == "open"
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then
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return true
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else
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return false
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end
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end
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action = function()
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return "Warning: smtp is running on a strange port"
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end
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