Nmap done: 1 IP address (1 host up) scanned in 47.96 seconds Set interfaces ge-0/0/3 unit 0 family inet address 10.10.10.1 Set security zones security-zone scan-test interfaces ge-0/0/3.0 Set security zones security-zone scan-test screen scan-test Set security policies from-zone scan-test to-zone junos-host policy permit then log session-close Set security policies from-zone scan-test to-zone junos-host policy permit then log session-init Set security policies from-zone scan-test to-zone junos-host policy permit then permit Set security policies from-zone scan-test to-zone junos-host policy permit match application any Set security policies from-zone scan-test to-zone junos-host policy permit match destination-address any Set security policies from-zone scan-test to-zone junos-host policy permit match source-address any Set security screen ids-option scan-test tcp syn-flood attack-threshold 10 Set system services web-management https system-generated-certificate Set system root-authentication encrypted-password "$ABC123" With the Screen run show configuration |display set
What if you want to scan ALL ports of the IP range under scope.After configuring the screen option on an SRX device, if software such as NMAP is used to perform a port scan on the network, it is sometimes reported that the SRX device has opened ports that are not configured.Īn example of performing a port scan on an SRX device by using NMAP, with and without the screen option, is given below: The simple default scan above will check the 1000 most well known ports for each IP address. Nmap 192.168.10.0/24 Scan all ports of an IP range
Nmap 192.168.10.* 4) Specify a scan range of IPs using a subnet notation Nmap done: 131 IP addresses (2 hosts up) scanned in 6.52 seconds 3) Specify a scan range of IPs using a wildcard Starting Nmap 7.12 ( ) at 22:03 GTB Daylight Time Nmap done: 3 IP addresses (3 hosts up) scanned in 11.46 seconds 2) Specify IPs in consecutive range
MAC Address: 00:08:9B:8B:F5:EB (ICP Electronics) Starting Nmap 7.12 ( ) at 21:55 GTB Daylight Time There are four ways to scan multiple IP addresses: 1) Specify IPs one-by-one separated by space In this default scan, nmap will run a TCP SYN connection scan to 1000 of the most common ports as well as an icmp echo request to determine if a host is up. The default scan of nmap is to run the command and specify the IP address(es) without any other options. Now let’s go ahead and see several nmap options to scan multiple IP addresses in a network.
NMAP is an excellent utility to help you in the reconnaissance phase since you can collect information such as: This is the reconnaissance phase of a security test. In a penetration testing project you need first to “map” and identify as much information about your targets so that to plan your next steps. Disclaimer: Network Scanning and hacking is illegal unless you have permission. The tool that I use in almost all penetration testing engagements is the famous NMAP scanner (short for Network Mapper tool). One of my responsibilities in the company I work is to perform security assessments and penetration testing on the external and internal systems of the enterprise.
NOTE: For a more comprehensive NMAP Tutorial with all popular and useful commands you can download this Nmap Cheat Sheet PDF here. There are hundreds of scan options with NMAP but I will start with the most useful one which is to scan a range of IP addresses together with some other extra options.
The purpose of this article is to describe how to perform a simple NMAP scan of an IP range/subnet on a network.
This tutorial marks the beginning of a series of network security and penetration testing articles that I will be posting on this website.