2015年9月20日 · NMAP PING and UDP Scanning When using NMAP, there are basic scans which are used to find specific information. These scans are the most used by NMAP and can be handy depending on what you need to discover on a system or a network. Let's start by listing the basic scans. The four basic scans are: PING Scan (-sP) UDP Scan (-sU) TCP SYN Scan (-sS)

2025年1月11日 · To use the TCP ACK Ping you need to have Root privileges and use the paramter ‘-PA’. UDP Ping A User Datagram Protocol (UDP) Ping is performed when a Source system sends a UDP datagram to a Target system at a high Port number. Firewalls do not normally block UDP datagrams especially at higher Port …

2017年5月18日 · To open any UDP ports, you can do the following: Go to Control Panel> System and Security and Windows Firewall. Advanced settings > right-click Inbound Rules and select New Rule. Add the port(s) you want to open and click Next. Select UDP protocol and the port(s) number(s) into the next window and click Next. Select Allow the connection and hit ...

If ping fails it tries to send syn packets to port 80 (SYN scan). This is not hundred percent reliable because modern host based firewalls block ping and port 80. Windows firewall blocks ping by default. The hosts you have on the network are blocking ping and the port 80 is not accepting connections. Hence nmap assumes that the host is not up.

2015年12月15日 · The -z switch prevents sending any data to a TCP connection and very limited probe data to a UDP connection, and is thus useful as a fast scanning mode just to see what ports the target is listening on.

2018年2月21日 · ICMP (ping) floods are more damaging because they are slower and generate lower traffic than UDP flood attacks and the server will try to respond to ICMP requests more often than UDP requests. But, in terms of how fast the server goes down UDP, HTTP, TCP and LDAP are more effective for an instant downing of the server.

2021年9月3日 · To answer this question, we can look at the nmap manual:. HOST DISCOVERY: -sL: List Scan - simply list targets to scan -sn: Ping Scan - disable port scan -Pn: Treat all hosts as online -- skip host discovery -PS/PA/PU/PY[portlist]: TCP SYN/ACK, UDP or SCTP discovery to given ports -PE/PP/PM: ICMP echo, timestamp, and netmask request discovery probes -PO[protocol list]: IP Protocol Ping -n/-R ...

2022年7月9日 · Ping uses a special kind of IP (Internet Protocol) packet known as ICMP (Internet Control Message Protocol), as opposed to the much-more-common UDP (User Datagram Protocol, used for broadcast messages or anything where minimal overhead is needed) and TCP (Transmission Control Protocol, used everywhere reliable delivery is …

2010年11月15日 · ICMP runs alongside IP on the network layer, whereas UDP and TCP are stacked on top of IP on the transport layer.

To answer your question about 'how to break' - the easiest way is to use a 'ping' program that uses other protocols than ICMP and/or other options. hping3 is in Backtrack/Kali (you said you used Backtrack/Kali, but hping3 is available for download), and it allows you to use TCP and UDP pings, and it allows you to use other ICMP types for pings.