0
There really is no "port" for icmp but there is a icmp code. If you are looking for the icmp code for echo-reply it is 0 and the echo is 8 For an access list you could do the following: permit icmp any any echo-reply
permit icmp any any echo Or the same using the icmp code permit icmp any any 0
permit icmp any any 8
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What port does icmp belong to?
ICMP does not have a port like TCP and UDP.
What port is used for icmp echo re quest?
There really is no "port" for icmp but there is a icmp code. If you are looking for the icmp code for echo-reply it is 0 and the echo is 8 For an access list you could do the following: permit icmp any any echo-reply permit icmp any any echo Or the same using the icmp code permit icmp any any 0 permit icmp any any 8
Why is it that an ICMP packet does not have source and destination port?
Because ICMP is on the network layer
Which port does ping uses?
The answer is none.No ports required for Ping as it uses icmp packets.It needs to allow icmp 'echo-request' (type 8) packets out and icmp 'echo-reply' (type 0) packets in.If you need to check the availability of a port, you must use a different tool, such as Paping.It doesnt use any port. Echo request is an ICMP message which is an Internet Layer Protocol so it is sent as an IP datagram.If you need to check the availability of a port, you must use a different tool, such as Paping.
Why filtering ICMP traffics by ACLs is not advised?
Because ICMP traffic, notably ICMP ECHO REQUEST-0 and ECHO REPLY-8 are used in network diagnostic sequences.
Is icmp a routing protocol?
No, ICMP is not a routing protocol. ICMP (Internet Control Message Protocol) is used by the Internet Protocol suite (IP) to send error and status messages. It is mainly used for diagnostics. Ping and traceroute are two tools that use ICMP. ICPM is used by routing protocols, for routing advertisements and router discovery.
Is used to relay query messages?
ICMP
What Is used to relay query messages?
ICMP
Protocol used for reporting the error occurred during the datagram transfer is called?
ICMP- Internet Control Message Protocol
How traceroute works?
The "traceroute" program uses ICMP messaging and the time to live (TTL) field in the IP header. It works by sending a packet to the intended host with a TTL value of 1. The first router will send back the ICMP "time exceeded" message to the sending host. Then the traceroute program will send a message with a TTL of 2, then 3, etc. This way it will get information about each router using the information received in the ICMP packets. To get information about the receiving host, the message is sent to a port that is not likely to be serviced by that host. A ICMP "port unreachable" error message is generated and sent back.
What transport layer protocol does ping use?
Assuming IPv4 ICMP. Ping uses IP for transport. Ping in itself is an "Echo Request", which is a function of the ICMP protocol. The IP Packet will carry the ICMP protocol from end-to-end. ICMP has a protocol number of 1, so the "Protocol" field in the IPv4 header will contain "1" as a reference to the ICMP payload. For IPv6, ICMPv6 is used, and the transport will be IPv6.
What is ICMP used for?
to send error messages to send control messages
