Forum Discussion
igor_
Cirrus
CirrusF5 Malicious Source IP Address Alert
Hi all, Recently we had F5 detect an ongoing malicious attack which we saw on the panel Security > Event Logs > Application > Requests. Is there a way to configure F5 to send an alert ...
The malicious IP means that this ip has done more than 10 violations.
Malicious Source IP Addresses (f5.com)
You can make and schedule ASM/AWAF default or custom report and send it by email:
You can see also session tracking to block ip addresses that generate too many violations and then configure the report for this violation or look into your SIEM for the violation:
Preventing Session Hijacking and Tracking User Sessions (f5.com)
Aswin_mk
Cumulonimbus
CumulonimbusThis is part of asm and if you create a better asm logging profile for remote logging, this will share to graylog. They can create alerts from greylog events.
https://my.f5.com/manage/s/article/K000138970
Logging - https://techdocs.f5.com/kb/en-us/products/big-ip_asm/manuals/product/asm-implementations-11-5-0/12.html
igor_Cirrus
CirrusThanks, but why can't F5 BIG-IP send an email alert in real-time, without doing this on another system? Can this be done too?
And not just setting reporting to every 6, 12, 24 hours.
BR,
Igor
- Nikoolayy1
MVP
You have to ask why F5 doesn’t want to do it. If you give the users option to send emails in real time then if you have 100 attacks a second you will get 100 emails and over utilize your F5 device as it has to generate emails and the F5 device is not made for mass sending of emails in real time. Most vendors don't even send emails in the form of reports, so for me this enough as a F5 capability. For real time emails this is what SIEM like splunk or ELK are for as to get the logs from many systems and generate alarms and emails or even nowadays XSOAR SIEM can use api to block the bad ip addresses detected by the F5 ASM/AWAF at the edge firewall or even stubbing Center level.