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Hello.
Can open a port but no service run on it cause a security problem? Nmap can detect that port is open but no service run on it.
Thank you.
Sorry, no...ports don't 'open' unless a service is running to actually OPEN IT. Does this tie in with your (going on five) other threads now about some generic security issue???
Sorry, no...ports don't 'open' unless a service is running to actually OPEN IT.
Well the OP probably means “open in the firewall”.
Should not be a problem, until somebody runs a listener by mistake or malice. Normally there is no reason to leave unused ports open in the firewall, so the question is somewhat moot, I think.
Last edited by berndbausch; 12-30-2018 at 06:19 PM.
Well the OP probably means “open in the firewall”.
Should not be a problem, until somebody runs a listener by mistake or malice. Normally there is no reason to leave unused ports open in the firewall, so the question is somewhat moot, I think.
While I don't disagree with your analysis, I'd suggest there's not much hope of guessing what this OP "probably" means about anything.
Note that if one isn't running a firewall at all, all ports are "open," but as you say, there's no harm if nothing is listening on the open port.
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