Home » Kerio User Forums » Kerio Control » reject speed VPN (very low VPN speed between KC and KC over L2TP)

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When connecting to the Kerio Control client (Windows 10), the real speed is 70 Mbit\s (out of 100 Mbit\s).
When connecting to Kerio Control to Kerio Control via L2TP, the speed is 1 Mbit\s.
A client NAT rule was created through L2TP, the Internet for clients was allowed on the receiving side and an appropriate rule was created.
Debug is full of messages:
{pppd} pppd [18549]: Protocol-Reject for unsupported protocol 0x6c5d
{pppd} pppd [18549]: rcvd [CCP ResetReq id = 0x2]
{pppd} pppd [18549]: sent [CCP ResetAck id = 0x2]
{pppd} pppd [18549]: rcvd [LCP ProtRay id = 0x3 00 5b f2 ​​dc ee 8e c3 2c 2f e6 86 2a bc 0d 56 9b 26 56 4b 88 b9 be ac 47 9c f5 b4 5e ba 73 42 78 ... ]
{pppd} pppd [18549]: Protocol-Reject for unsupported protocol 'Vendor-Specific Network Protocol' (0x5b)

I tried all types of encryption and authentication together and separately. Prompt please in what there can be a business?
This realization is very important for me.
Thank you in advance.

The version of both KC 9.2.6, but tried to lower - did not help.
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