Virtual Service for Proxy Server: timeouts when traffic goes through LTM
we've got since a few years our proxy Server (McAfee Webgateway, now SkyHigh) behind LTM.
We had originally 2 Members, later 4 Members, every Member had about 5000 tcp Connections, no problems.
Since about 2 Weeks we've very often Timeouts on Internet-Access (taking up to 20 sec to connect), but the Connections were not very increasing.
As a Workaround the most of the Clients are now directly connected to different new virtual Proxy-Instances without LTM. These Clients does not suffer on Timeouts, only the Clients who connect to Internet via LTM-> Proxyserver.
None of the Statistics on LTM show high CPU or Memory Usage.
The LTM are VM's on ESXI, BIG IP Version 18.104.22.168
We use VS-Type Standard, no SSL-Interception, only a modified http Profile with "Insert XFF enabled"
We are very much focused on Problems of the Proxy-Server, but since the Workarounds show, that Internetacess without LTM is much more reliable without LTM, I'm asking where I could try to tune the LTM-side.