Top "Icmp" questions

Internet Control Message Protocol, designed for control and diagnostic messages.

Block ping in Windows Server 2008 R2

I have deployed my Asp.Net web application on Windows Server 2008 R2 , and I want to block all ping requests …

windows-server-2008 icmp
Problem with isReachable in InetAddress class

As an assignment I have to find all the alive computers on a LAN. For which I am using isReachable …

java networking icmp
ICMP echo checksum

How can I compute the checksum of an ICMP echo request or reply when the checksum should include the data …

network-programming checksum icmp
Why traceroute sends UDP packets and not ICMP ones?

According to the Stevens (TCP/IP Illustrated) the traceroute program sends UDP packets to the destination host with an incremental …

networking udp icmp traceroute
icmp request received, but doesn't reply

I set up 3 CentOS servers, configured server2 as router between 192.168.1.0/24 and 30.0.0.0/24, but ping can't get through. I tried ping 192.168.1.62 from …

linux networking router tcpdump icmp
Difference between struct ip and struct iphdr

I am trying to understand how the network is working, i'm doing some test, sending some package... anyway My point …

c networking ip icmp
udp client sending ICMP "port unreachable" when receiveing messages from the server

Moved: https://superuser.com/questions/782549/udp-client-sending-icmp-port-unreachable-when-receiveing-messages-from-the-ser I have a udp client using luasocket, basically doing this (with a few layers …

sockets networking udp icmp luasocket
Is ICMP a transport layer protocol?

I was going through a video lecture on networking and there the lecturer mentions ICMP as a transport layer protocol. …

networking icmp
How to ICMPs and traceroutes in Java

Java does not have primitives for ICMPs and traceroute. How to overcome this? Basically I'm building code that should run …

java sockets traceroute icmp
Maximum legal size of ICMP echo packet

Can someone please explain why maximum legal size of ICMP echo packet is calculated as follows: 65535 - 20 - 8 = 65507 Thanks.

networking icmp