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Questions tagged [icmp]

ICMP stands for Internet Control Message Protocol. It is primarily used by the operating systems of networked computers to send error messages indicating service status.

ICMP is not normally used by end-users or to send messages. It's main use is in diagnostics and checking that the network is functioning correctly.

ICMP is just one communications protocol on the web. Others include:

  • Transmission Control Protocol (TCP)
  • User Datagram Protocol (UDP)
  • Hypertext Transfer Protocol (HTTP)
  • Post Office Protocol (POP3)
  • File Transfer Protocol (FTP)
  • Internet Message Access Protocol (IMAP)

ICMP on Wikipedia

227 questions
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ICMP - How to send a timestamp and netmask request?

How can I submit a ICMP request for timestamp and netmask request to a host without using NMAP? Is it possible to generate a terminal / command line request with a tool like hping3 or any native Linux / Windows tool?
user238856
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ICMP traffic limit on Google Cloud Plataform

A few weeks ago we realized that there are losses of ICMP packets sent/received between the networks of the telecommunications operator Telefonica / Vivo from Brazil and the IP addresses of Google in the United States (US Central). We have a server…
Consultoria Ti
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icmp redirect how to check if it works

I have seen on the internet many tips to disable icmp redirects. What I would like to know is how to properly check on windows and linux if it actually works? I have managed to spoof a fake icmp redirect packet with scapy on linux, i can see that…
uQuad
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Why would a host block ICMP echo (ping response) yet it allows me to connect to it?

Is there a security reason for that?
Matka
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1 answer

Security zones regarding ICMP Flood Attacks

I found this statement describing ICMP Flood attacks and I am confused about the term "Security Zone" being used in it. " Once the ICMP threshold is reached, the server will stop accepting any further ICMP ECHO requests from all addresses in the…
iridescent
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ICMP types commands on CMD?

To use ICMP type 8 we write : >ping IP@. I was wondering what commands would allow me to use other types of ICMP like type 13?
medilies
  • 103