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The live systems will send ICMP echo reply message to the source of the ICMP echo probe.

EC-Council. Certified Ethical Hacker (CEH) Version 10 eBook w iLabs (Volumes 1 through 4).

Ebook Kali Linux 200 Attack Bahasa Indonesia Full Open Scan

Scanning ICMP Network Services: ICMP Scanning Ping Sweep ICMP Echo Scanning Scanning TCP Network Services: Open TCP Scanning Methods o TCP Connect Full Open Scan Stealth TCP Scanning Methods o Half-open Scan o Inverse TCP Flag Scanning Xmas Scan FIN Scan NULL Scan o ACK Flag Probe Scanning Third Party and Spoofed TCP Scanning Methods o IDLE IP ID Header Scanning Scanning UDP Network Services: UDP Scanning.

ICMP Scanning - Checking for Live Systems Attackers use ICMP scanning to send ICMP packets to the destination system to gather all necessary information about it.

This is so because ICMP does not have a port abstraction and it is not the same as port scanning.

However, it is useful to determine what hosts in a network are running by pinging them all (Nmap uses the -P option to ICMP scan in parallel, which can happen quickly).

The user can also increase the number of pings in parallel using the -L option.

It can also be helpful to tweak the ping timeout value using the -T option.

This scan is useful for locating active devices or determining if ICMP is passing through a firewall.

ICMP Query The UNIX tool ICMP query or ICMPush requests the system time (to learn the system time zone) by sending an ICMP type 13 message (TIMESTAMP).

The netmask on a particular system can also be determined using ICMP type 17 messages (ADDRESS MARK REQUEST).

After finding the netmask of a network card, a user can determine all the subnets in use.

Then, the user can target only one particular subnet and avoid hitting the broadcast addresses.

ICMP query has both a timestamp and address mask request option: ICMP query -B -f fromhost -d delay -T time target Where, is one of: -t: ICMP timestamp request (default) -m: ICMP address mask request -d: delay to sleep between packets is in microseconds -T- specifies the number of seconds to wait for a host to respond.

The default is 5.A target is a list of hostnames or addresses.

Angry IP Scanner Source: Angry IP scanner is an IP address and port scanner.

It can scan IP addresses at any range as well as any of their ports.

It pings each IP address to check if they are alive, then it optionally resolves its hostname, determines the MAC address, scans ports, and so on.

The amount of data gathered about each host extends with plugins.

The tool allows the user to save the Scanning results to CSV, TXT, XML, or IP-Port list files.

To increase scanning speed, it uses a multithreaded approach: a separate scanning thread created for each scanned IP address.

ICMP Echo Scanning ICMP echo scanning pings all the machines in the target network to discover live machines.

Attackers send ICMP probes to the broadcast or network address which relays to all the host addresses in the subnet.