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Slow SSL VPN

Hello,

I have two xg 210 in A/P HA (18mr4) and two branch offices with red60

LocalityA - 2x xg210 HA (ISP 100/100Mbps) FileserverA

      - utilization is about 50% during working hours and 10% out of working hours  

LocalityB - RED60 (ISP 100/100Mbps) FileserverB

     - utilization is about 10% during all day

LocalityC - RED60 (ISP 100/100Mbps) FileserverC

     - utilization is about 10% during all day

We have problem with slow SMB download/upload only  VPN<>FileserverC (0,5-1Mbps)

We try to SMB down/up: 

     FileserverA<>FileserverC = OK (~80Mbps)

     FileserverA<>FileserverB = OK (~80Mbps)

     FileserverB<>FileserverC = OK (~80Mbps)

     VPN<>FileserverB = OK (30-40Mbps)

     VPN<>FileserverA = OK (30-40Mbps)

We try everything what we can find on internet:

Change VPN config TCP<>UDP

disable/enable Compress SSL VPN traffic

disable/enable Tunel compresion for RED

DoS bypass rule for VPN subnet and LocalityC subnet

Change QoS "network traffic" for user group from none to "max network traffic"

MTU on wan port

MTU in clients VPN config file

system firewall-acceleration disable

no IPS / application control in vpn FW rule

We've tried various combinations, but nothing helped. 

Any Idea?

Thank you. MOl



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