networking - Does NAT spoof TCP or UDP port in ICMP

networking - Why traceroute sends UDP packets and not ICMP It's actually the "old" method of doing traceroutes. I guess the main motivation was that sending out plain UDP packets requires no special privileges, as sending ICMP packets does (raw sockets or the equivalent). That's why e.g. ping is usually setuid to root, which is a big risk security-wise. TCP, UDP, and ICMP So that would be an example of UDP. The last one is the strangest one, it's called ICMP. ICMP is a single packet. It's never more than one packet. TCP can be thousands of packets. UDP can be thousands of packets. But ICMP is always a single packet. It's kind of like the working-class schlub of the internet. TCP, UDP and ICMP - 1.73.0 TCP, UDP and ICMP Boost.Asio provides off-the-shelf support for the internet protocols TCP, UDP and ICMP. UDP UDP:SrcPort=49875,DstPort=3343 ICMP ICMP:Destination Unreachable Message, Port Unreachable, During the course of troubleshooting connectivity issue, you might also see in the network trace that a machine receives packets but does not respond to.

Jul 06, 2011 What is UDP? | Cloudflare What is User Datagram Protocol (UDP/IP)? UDP is a communication protocol used across the Internet for especially time-sensitive transmissions such as video playback or DNS lookups. It speeds up communications by not requiring what’s known as a “handshake”, allowing data to be transferred before the receiving party agrees to the communication. TCP, UDP and ICMP - 1.66.0

The appliance monitors UDP or ICMP traffic to a specified destination or to any destination. If the rate of UDP and ICMP packets per second exceeds the allowed threshold for a specified duration of time, the appliance drops subsequent UDP or ICMP packets to protect against a flood attack.

This lesson discusses more obscure aspects of networking and focuses specifically on: TCP: Transmission Control Protocol Connection-oriented FTP; HTTP, SSH Uses ports UDP: user datagram protocol Connectionless TFTP Uses ports UDP: User datagram protocol Connectionless TFTP Uses ports ICMP: Internet RFC 5508 - NAT Behavioral Requirements for ICMP RFC 5508 NAT Behavioral Requirements for ICMP April 2009 NAT session would provide the translation glue between the two session representations. NAT sessions in the document are restricted to sessions based on TCP, UDP, and ICMP. In the future, NAT sessions may be extended to be based on other transport protocols such as Stream Control Transmission Protocol (SCTP), UDP-lite, and Datagram Configuring IP SLAs ICMP Path Jitter Operations - Cisco Apr 25, 2018 NetScaler Unified Gateway Advanced Authorization Policy