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Dec
16
comment How to force nmap to check all the ports?
@Bachrach44 Port 0 is a technicality of the TCP spec that doesn't work in most systems, since the socket API considers the number 0 to represent "any available port." It can be included for completeness with -p 0-65535, but it is nearly impossible that you would ever find a valid listening service there.
Dec
15
revised nmap mac os lots of questionable ports open
respond to comments
Dec
15
comment nmap mac os lots of questionable ports open
@cremefraiche Without output from netstat there's no way to know whether the service is listening strictly on localhost or is also listening on other interfaces. I chose the answer that would represent the next step in diagnosing a potential problem.
Dec
15
comment nmap mac os lots of questionable ports open
Did you try using lsof -i | grep LISTEN to see which processes have listening sockets? You could also try Nmap's -sV flag to see if it's a recognized service.
Dec
15
answered nmap mac os lots of questionable ports open
Dec
7
answered different results using nmap with/without sudo
Dec
2
revised Can TLS fallback work with server side support only?
answer the question that was asked.
Dec
2
answered Can TLS fallback work with server side support only?
Nov
28
answered What does “unknown” status in nmap mean?
Nov
24
comment Choosing TLS / SSL cipher suites - What considerations are there?
You may be interested in my answer to a related question: security.stackexchange.com/a/72932/9209
Nov
14
answered Is TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 a safe cipher suite to use?
Nov
2
comment portscan using nmap fails to return open dhcp-port
@DJake Lots of UDP services are like this, which is why Nmap sends appropriate payloads when possible during the port scan, in order to elicit a response: nmap.org/book/nmap-payloads.html
Oct
21
answered How to bypass tcpwrapped with nmap scan
Oct
16
revised How nmap guesses the operating system?
correct and link the descriptions of the tests
Oct
16
comment How does OS detection work in practice?
The section of the Nmap book on OS detection is very good, too: nmap.org/book/osdetect.html
Oct
16
suggested approved edit on How nmap guesses the operating system?
Sep
19
answered Does Nmap requires a closed TCP port to do OS fingerprinting?
Sep
10
comment Devices with cryptic names and Chinese ip addresses connected to my router
@JerryA Not very likely. It would be a messy exploit that would mess things up like that. Did it go away when you rebooted the router?
Aug
20
revised Optimal flags to specify when using nmap to guess the OS on remote devices?
Fix bad advice.
Aug
17
answered Why do we use such a redundant language (English) for network communication?