Ars Technica

ICMP Type 3, code 4: "The datagram is too big"

Hi everyone.<BR><BR>Recently, my firewall was caught with a bug that cause it to blacklist itself: when it encountered a packet with the "No not fragment" flag set too big to fit on the next hop, it ...
TechRepublic

Filter ICMP traffic in the Cisco IOS

While ICMP is required for IP network traffic redirection and pinging hosts on your LAN or WAN, ICMP can also pose a security concern. David Davis tells you about the basics of ICMP and how to filter ...
Network World

Open-source library cataloguing; ICMP packet surge from Exchange server

A: A high level of ICMP packets between your Active Directory controllers and Exchange server is not a normal situation from the networks that I have looked at. You have checked for viruses and that ...
Network World

ICMP packet surge from Exchange server

Recently, I noticed that there has been a surge in ICMP packets between some of my Active Directory controllers and Exchange servers. Virus scanning proved that the servers were clean. Is there any ...
EDN

TCP/IP Embedded Internet Applications – The Network Layer, Part 2: IPv6, ICMP and UDP

The current IP address scheme of 32-bit words is fast becoming inadequate. It would appear that 2 32 = 4 294 967 296 combinations of addresses should be enough for everybody, but in practice this is ...