Hello all,
The organisation I work for uses a couple of ASG320 in high availability setup as a main gateway. For the last few weeks / months, this setup has been intermittently acting up, causing us some trouble.
Symptoms :
every X days (from 1 to 6/7 days), at a seemingly random time, the CPU usage of the appliance will shoot up to 100% for several hours, making everything slow down to a crawl. Loss of internet connectivity, websites in the DMZ not accessible to the outside world, extremely sluggish access to the admin interface of the appliance.
We don't use web or email proxy, so I guess the issue is not caused by those. Also, switching to the other appliance in the HA setup solves the problem temporarily - so I guess the issue is not caused by some kind of attack overloading the appliance.
We've tried reviewing the logs, but were unable to find anything significant.
Has anybody experience such an issue before? Any help/pointers would be much appreciated.
Thanks!
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