On 6/25/21 4:02 PM, Ed Greshko wrote:
On 24/06/2021 01:58, Gordon Messmer wrote:
On 6/22/21 11:54 PM, Ed Greshko wrote:
[root@meimei ~]# nmap -sS -6 -p 2049 2001:b030:112f:2::53
Starting Nmap 7.80 ( https://nmap.org ) at 2021-06-23 14:47 CST
Nmap scan report for 2001:b030:112f:2::53
Host is up (0.00018s latency).
PORT STATE SERVICE
2049/tcp closed nfs
Means the firewall is not blocking the port but no service is
listening on that port
That's not entirely accurate. If the firewall action is REJECT rather
than DROP, you'll see the same output from nmap. "closed" can mean
either that the port is not open, or that the firewall is blocking
access with a REJECT action.
OK, good to know, thanks. I don't think I've encountered that which may
explain my ignorance.
It's very rare. In almost all cases, DROP is the default. So the
"closed" result can be assumed to mean what you said it means.
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