Hello
I am getting a large number of entries related to the DNS.PTR.Records.Scan signature. The origin is one of my servers making requests to 8.8.8.8 or 1.1.1.1
What actions do you recommend?
eventtime=1725978564223549647 tz="-0400" logid="0419016384" type="utm" subtype="ips" eventtype="signature" level="alert" vd="root" severity="low" srcip=19.19.12.101 srccountry="Reserved" dstip=8.8.8.8 dstcountry="United States" srcintf="z2" srcintfrole="wan" dstintf="Internet" dstintfrole="wan" sessionid=88096527 action="dropped" proto=17 service="DNS" policyid=229 poluuid="79818ba8-59a9-51ef-f294-51bc44ab72d9" policytype="policy" attack="DNS.PTR.Records.Scan" srcport=59436 dstport=53 direction="outgoing" attackid=51391 profile="high_security" ref="http://www.fortinet.com/ids/VID51391" incidentserialno=45804839 msg="name_server: DNS.PTR.Records.Scan" crscore=5 craction=32768 crlevel="low"
Nominating a forum post submits a request to create a new Knowledge Article based on the forum post topic. Please ensure your nomination includes a solution within the reply.
Hello Ninja,
Thank you for using the Community Forum. I will seek to get you an answer or help. We will reply to this thread with an update as soon as possible.
Thanks,
Hello Ninja
According to Fortinet on http://www.fortinet.com/ids/VID51391 the IPS action for this signature is "pass" by default.
As this is a false positive, go to the IPS profile you are using, search for the signature DNS.PTR.Records.Scan signature, and set action to "Allow".
Just for info: a DNS PTR Record is nothing evil ;) PTR records are used for reverse DNS which means you ask the DNS for a FQDN to an ip.
--
"It is a mistake to think you can solve any major problems just with potatoes." - Douglas Adams
Select Forum Responses to become Knowledge Articles!
Select the “Nominate to Knowledge Base” button to recommend a forum post to become a knowledge article.
User | Count |
---|---|
1698 | |
1092 | |
752 | |
446 | |
228 |
The Fortinet Security Fabric brings together the concepts of convergence and consolidation to provide comprehensive cybersecurity protection for all users, devices, and applications and across all network edges.
Copyright 2024 Fortinet, Inc. All Rights Reserved.