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Online Ping a Specific Port

What is Ping?
ICMP (Internet Control Message Protocol)

ICMP (Internet Control Message Protocol) is a network layer protocol that reports errors and provides information related to IP packet processing. ICMP is used by network devices to send error messages indicating, for example, that a requested service is not available or that a host isn’t reachable.

ICMP is commonly used by network tools such as ping or traceroute.

Advantages of the ICMP Echo Request and TCP ACK Ping

The ICMP echo request and TCP ACK ping is a good all-purpose ping. This ping will obtain a response from all devices if the path is clear for ICMP, and it will get a response from a remote device if port 80 is not filtered. Since most packet filters allow port 80, there's a good possibility that this packet will get through.

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