March 2018
Intermediate to advanced
626 pages
17h 32m
English
book
Network Analysis Using Wireshark 2 Cookbook - Second Edition
by Nagendra Kumar Nainar, Yoram Orzach, Yogesh Ramdoss
Content preview from Network Analysis Using Wireshark 2 Cookbook - Second Edition
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How to do it...
When you suspect a brute force on the network, follow these steps to locate it.
- Connect Wireshark with a port-mirror to the port in the server that you suspect is under attack.
- For DNS brute force attacks, look for DNS queries that are asking for common names under your domain. For example, in the following screenshot, you can see a scan for ISP servers. We can see DNS queries to common names such as DNS (1) and DNS (2) a record for IPv4 (2) and a record for IPv6 (3), and intranet—a record for IPv4 (4) and a record for IPv6 (5).
- In the case of dns.icomm.co (1), we got a reply; in all other cases, we did not.
- Many queries with no response can not only indicate a DNS brute attack, but also indicate someone who is looking ...
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