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I have to ask, how does one come across such open servers? Do you just try common ports on random IP addresses until you find one that works?
by cjmoran 11y ago
I have to ask, how does one come across such open servers? Do you just try common ports on random IP addresses until you find one that works?
- gravypod 11y agoLook up Zmap
- zanny 11y agoThere are only 4 billion IPV4 addresses. Just iterate port 5900 until you get a response, bam, VNC server.
- spydum 11y agoShodan.io is pretty good index of open ports on the internet
- achillean 11y agoShodan has been keeping track of publicly accessible control systems for several years now and you can use the search engine to identify them. As a starting point check out: https://www.shodan.io/explore/category/industrial-control-systems https://www.shodan.io/explore/category/industrial-control-sy...
- ATsch 11y agoanother, newer alternative is https://github.com/robertdavidgraham/masscan https://github.com/robertdavidgraham/masscan note that doing this is a very good way to get angry letters from your ISP