DNS and Traceroute

In this video, well discuss some basic DNS enumeration tools like dig, nslookup and host.
Well use the dig (Domain Internet Groper) tool to query the DNS server to resolve www.logicalsecurity.com.

Well now use the ns switch to query the DNS server to return the same server of www.logicalsecurity.com.

The mx (mail exchanger) switch returns the mail servers of logicalsecurity.com.

The axfr switch is used for zone transfer. Although in our case, it has failed as most secure DNS servers do not allow zone transfers.

The nslookup tool is used for the same purpose as dig, but is seldom used in the linux environment. Once we enter nslookup, and interactive prompt appears where we can enter set type=ns or et type=mx for name and mail servers respectively.

Another commonly used tool for DNS lookups is host. The -t specifies the query types, in our case they are ns, mx and cname for the name server, mail server and canonical name respectively.

The -l switch lists all hosts in a domain and is used for zone transfers.

Thetraceroute tool is used to trace the path a packet takes to travel from the source to the destination across the IP network. You can see that our packets reach their destination in 20 hops. Each hop represents a router which helps packets to reach their destination.
www.logicalsecurity.com


Logical Security is on the GSA Schedule and is a woman-owned, veteran owned company.

Category:

Science & Technology

Tags:

• CISSP
• Course
• Shon
• Harris
• logical
• security
• network
• DNS
• traceroute
• ns
• nslookup
• dig
• Domain
• Internet
• Groper