Read more from here Command & Control via ICMP Protocol The target host responds with an echo Reply which means the target host is alive. According to MTU the size of the ICMP packet cannot be greater than 1500 bytes.Ī ping command sends an ICMP echo request to the target host. network layer protocol used by the ping command for sending a message through ICMP payload which is encapsulated with IP Header Packet. It is used by network devices, including routers, to send error messages and operational information which indicates that a requested service is not available or that a host or router could not be reached.
The Internet Control Message Protocol (ICMP) is a supporting protocol in the Internet protocol suite.
Configure ICMP tunnel over Client Machine (Intruder).Configure ICMP over Server Machine (Target).Table of Contentīrief Summary on working of ICMP Protocol If you /msg me, I could share a crude but functional perl script that I have that collects this information using Net::Telnet, from an Enterasys router.In this article, you will learn about the RED TEAM Operation for data exfiltration via ICMP-C2 and ICMP Tunneling because both approaches are useful in order to circumvent firewall rules because they generate unsound traffic in the network. You should be able to get the contents of the ARP cache, which contains MAC to IP address mappings, either via SNMP, or via telent. The core router in this scenerio would be the only device that is aware of all other devices that are communicating on the network, and it needs to maintain an ARP cache. You appear to have a medium sized network - which would normally be divided into subnets and/or VLANs, most likely all connected to a core router.
You can install on your pc MacAddressLocator. If there are hosts on the "other side" of a router, use SNMP to retrieve those from the router or run this program on each segmentīy spadacciniweb (Curate) on at 13:07 UTCīut if you have SNMP-aware switch in your lan,.for each host use Net::ARP to find the addresses of the hosts on the local segment.use Net::DNS to enumerate all the hosts listed.If your hosts all have IP addresses and you have a DNS server for them: Update: see monarch's post, below, for excellent info about SNMP polling and segment restrictions.
Do you have some bulk distribution mechanism for the PCs? If you can get the program to run on the other machines remotely, then you might be able to poll them all. Net::Address::Ethernet essentially returns the MAC address of physically installed ethernet cards on the machine. If you have Cisco Catalysts, you might be able to poll them for their CAM tables, and pull back connected info from that, but the best way to get these addresses is probably by polling a hardware information program resident on each PC. I think you're going to have to take a different tack on this one.
If you want MAC addresses of devices beyond the current Ethernet segment (ie devices that are a router hop or more away) then you will have to get that device to volunteer the MAC address information by using a SNMP query or by installing your own special client software on each of those remote devices. Not every device will respond to a broadcast ping. Note that this will only get the addresses of devices on the local Ethernet segment. Then you can get a list of MAC addresses by looking up the ARP cache ( arp -a on linux). If you are on a LAN you can try sending a broadcast ping ( ping -b 255.255.255.255 on linux) which any compliant device will respond to.