Citing large network bandwidth is required, we suggest install CCVSR server and KN in the same LAN. 

For example on KN8164V, bandwidth required for one CCVSR recording session is 44.6Mbps

One CCVSR server can record up to 20 concurrent sessions, then approximate 900Mbps bandwidth is required.  

44.6Mbps/Channel x 20 = 892Mbps/Channel

Please refer to user manual page 5 for more detail:

https://assets.aten.com/product/manual/ccvsr_um_w_2021-01-14.pdf