Questions tagged [icmp]

I'm learning about data exfiltration using ICMP and delivery of a payload is generally done using the -p "pad bytes" in ping -c 1 -p $encoded_payload. Are there often legitimate use for "pad bytes"? Can it simply be stripped by a firewall in most…

For what is it usefull? I (client) send an echo-request (with http data) to the proxy server. Then the proxy has to send me the echo-reply. But my question now is: 2.1 The proxy first needs to send my data to the webserver, the webserver needs to…

I have several Linux Mint 21.3 PCs. Is it safe to allow all types of ICMP on these end-point stations on my local home network? My IPv4 iptables: $ sudo iptables -L --line-numbers Chain INPUT (policy DROP) num target prot opt source …

I have a question regarding the Smurf Attack described in the following CISCO article: http://www.cisco.com/c/en/us/about/security-center/guide-ddos-defense.html#9 In a smurf attack, an attacker broadcasts a large number of ICMP packets with the…