2009年10月8日 · You can't ping ports, as Ping is using ICMP which is an internet layer protocol that doesn't have ports. Ports belong to the transport layer protocols like TCP and UDP. However, you could use nmap to see whether ports are open or not. nmap -p 80 example.com Edit: As flokra mentioned, nmap is more than just a ping-for-ports-thingy.

2021年7月26日 · What port does 'ping' work on? None. Ping actually is NOT a service in the traditional sense. There is no ping daemon server. Ping (formally, ICMP Echo) is provided by the IP driver in the kernel, perhaps even by hardware itself in some architectures with hardware offloading. Also as others have mentioned, it uses ICMP.

2023年12月15日 · Yesterday an interviewer asked me what the port number for ping is and which protocol ping uses: TCP or UDP. After the interview, I searched on the Internet and found different results: someone says ICMP uses port 7, someone says it does not use any port number, on one site I found it uses IP protocol 1, etc.

How do I check if a port is consistently alive? For example, I could use. ping 192.168.1.1 -t > results.txt This will ping 192.168.1.1 continuously so that I could monitor it. Is there an equivalent tool or command that I could use for this? Currently I use telnet but sometimes the host disconnects it. I need a Windows solution.

2014年6月17日 · Or can I also ping an address:port, for example: onofri.org:80? If I try this one it doesn't work: miner@raspberrypi ~ $ ping onofri.org:80 ping: unknown host onofri.org:80 Is it possible ping something like address:port? If it is possible, why doesn't what I tried work?

ping is an ICMP protocol, whereas ports are TCP and UDP concepts. All 3 are distinct protocols on top of IP. That means an IP packet containing TCP cannot contain ICMP and vice versa. It also means the TCP header (with the port) is not present in an ICMP ping packet. –

2014年12月9日 · -n never do DNS resolution -P0 do not ping to test 'up' state -p this is the list of desired ports "22,80,443" check in SSH, HTTP and HTTPS in TCP The port list should be inside quotes in Windows because the comma is interpreted as space in the shell.

ICMP (of which ping is a part of) is its own protocol on top of IP. UDP/IP, TCP/IP, and ICMP/IP. There are no ports involved in the ICMP protocol, so there's no port number option on the command line. There are TCP ping applications that will perform similar functionality over TCP, and you may want to look at those.

$ sudo nmap -sU -pU:53 192.168.1.1 PORT STATE SERVICE 53/udp open domain On Disconnected port, STATE value will be either closed or open|filtered $ sudo nmap -sU -pU:53 192.168.1.2 PORT STATE SERVICE 53/udp closed domain $ sudo nmap -sU -pU:53 192.168.1.3 PORT STATE SERVICE 53/udp open|filtered domain

2018年11月2日 · The port numbers are also per protocol. For example, TCP and UDP use port numbers for addressing, but TCP port 12345 is not UDP port 12345. Only one process at a time can bind to TCP port 12345, but one process can bind to TCP port 12345 at the same time another process binds to UDP port 12345.