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DDoS attack killed the LoadMaster

 

Information

 

Summary:

DDoS attack killed the LoadMaster

Environment:

Product:LoadMaster

Version:All

Platform: All

Application:WAF

Question/Problem Description:

The LoadMaster at some point actually failed and moved to the slave.

Steps to Reproduce:  
Error Message: 2022-11-14T10:35:21+01:00 AMS-KEMP-01 ucarp: [ERROR] eth1: device write failed. Reconnecting
2022-11-14T10:35:22+01:00 AMS-KEMP-01 ucarp: [WARNING] Switching to state: BACKUP
2022-11-14T10:35:22+01:00 AMS-KEMP-01 ucarp: [WARNING] Interface v1051(vlan81) taken down
2022-11-14T10:35:22+01:00 AMS-KEMP-01 ucarp: [WARNING] Spawning [/etc/ha.d/down down]
Defect Number:  
Enhancement Number:  
Cause: The network is being hammered, all TCP sockets are being dropped to prevent a DDOS and then the interface failed.
Resolution: Box is overloaded with connections. Eth1 failed and caused the fail over. 
Workaround:  
Notes:

https://support.kemptechnologies.com/hc/en-us/articles/10109249551501-Rate-Limiting

 


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