ICMP   331

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Netcat 1.10 README
Some interesting history in the readme
security  hacking  pentesting  network  protocol  history  kernel  socket  TCP  UDP  ICMP  netcat 
11 days ago by asteroza
Transparently tunnel your IP traffic through ICMP echo and reply packets
'icmptunnel' works by encapsulating your IP traffic in ICMP echo packets and sending them to your own proxy server. The proxy server decapsulates the packet and forwards the IP traffic. The incoming IP packets which are destined for the client are again encapsulated in ICMP reply packets and sent back to the client. The IP traffic is sent in the 'data' field of ICMP packets.

https://dhavalkapil.com/icmptunnel/
proxy  icmp  tunnel 
5 weeks ago by diederich
Why enable ICMP inspection will allow ICMP traffic to pass ASA ? | Firewalling | Cisco Support Community
An ICMP inspection session is on the basis of the source address of the inside host that originates the ICMP packet. Dynamic Access Control Lists (ACLs) are created for return ICMP packets of the allowed types (echo-reply, time-exceeded, destination unreachable, and timestamp reply) for each session. There are no port numbers associated with an ICMP session, and the permitted IP address of the return packet is wild-carded in the ACL. The wild-card address is because the IP address of the return packet cannot be known in advance for time-exceeded and destination-unreachable replies. These replies can come from intermediate devices rather than the intended destination.

http://www.cisco.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ftfwicmp.html

UDP and ICMP do not themselves contain any connection information (such as sequence numbers). However, at the very minimum, they contain an IP address pair. UDP also contains port pairs, and ICMP has type and code information. All of these data can be analyzed in order to build "virtual connections" in the cache. For instance, a cache entry will be created by any UDP packet which originates on the LAN. Its IP address and port pairs will be stored. For a short period of time, UDP packets from the WAN which have matching IP and UDP information will be allowed back in through the firewall.
icmp_inspection  icmp  mpf  inspection 
february 2017 by swirls
Solved: ICMP Rate limit filter not working?? - Ubiquiti Networks Community
rule 2 {
action accept
description Allow-ICMP-Ping
icmp {
code 0
type 8
}
limit {
burst 5
rate 2/second
}
log enable
protocol icmp
}
EdgeMAX  EdgeRouter  firewall  ICMP  ping  limit 
december 2016 by coffeebucket
Blocking ICMP - Ubiquiti Networks Community
set firewall name eth2_local rule 5 action accept
set firewall name eth2_local rule 5 description "ICMP 50/m"
set firewall name eth2_local rule 5 limit burst 1
set firewall name eth2_local rule 5 limit rate 50/minute
set firewall name eth2_local rule 5 log enable
set firewall name eth2_local rule 5 protocol icmp
EdgeMAX  EdgeRouter  firewall  ICMP  ping  limit 
december 2016 by coffeebucket
An ICMP Reference
The Internet Control Message Protocol (RFC 792) was designed to provide network connectivity information to administrators and applications. The protocol i
tut  tools  networking  icmp  protocol  ip  tcp 
august 2016 by cjitlal
Maksadbek/tcpovericmp: TCP implementation over ICMP protocol to bypass firewalls
tcpovericmp - TCP implementation over ICMP protocol to bypass firewalls
tcp  golang  icmp 
april 2016 by geetarista

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