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Recently my friend asked me whether his network is secure because he is setting up a game server on port XXX.
I opened up Nmap on my linux machine and found port 443 opened. I tried to access
https://xxx.xxx.xxx.xxx:443
It redirected me to his ISP's website. That means that his router responded to my web request.
How would hackers use this imformation to DDOS his router or gain unauthorised access to his network?
Matty
Posted 2014-10-31T05:09:07.497
Reputation: 1
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If it redirected to the ISPs website than the ISP is likely not passing traffic on that port to your friend's router. As 443 is a common port used for hosting websites (HTTPS) it is typically blocked on most residential Internet connections.
If someone were to try and DDOS 443 they would likely end up DDOSing the ISP which wouldn't work out well for them.
I think your friend is probably safe from a DDOS on port 443.
Kevin Morse
Posted 2014-10-31T05:09:07.497
Reputation: 139
Please can you [edit] this question and add detail. You found 443 open on what? You tried to access what IP on port 443? The internal host? The router public address? If public address of the router, how did you determine it? If it goes to the ISP website, it is unlikely to have anything to do with his router. – Paul – 2014-10-31T05:16:00.407
Port 443 is used for things like HTTPS and SSL/TLS. Should be fine. – Michael Frank – 2014-10-31T05:16:11.357
Port 443 on his router's public address – Matty – 2014-10-31T16:40:56.637