Hello,
i have install a new server with centos 8 and csf and i have see very bad network performance.
When i disable csf, the performance is good.
In order to confirm the issue i have do this tests:
both servers is empty without any other vps. Also the storage i use have no load at all during tests.
server 1:
Xeon® E-2176G
64G ram
NVME hard disks
Proxmox 6.2-10
server 2:
Ryzen 9 3900
128G ram
nvme hard disks
Proxmox 6.2-10
In each server i have create 2 vps, one centos 7 and one centos 8. Both is minimal installation and 4 core cpu/8G ram/32G hdd, virtio network.
i have install csf, i have enable all blocklists and also i open some ports to 2 selected countries.
I have try to transfer with scp 1 file and here is the results:
In xeon server:
centos 7 with csf: speed 95MB/sec
Centos 7 without csf: speed 100+MB/sec
Centos 8 with csf: speed 7MB/sec
Centos 8 without csf: speed 100+MB/sec
In amd cpu:
centos 7 with csf: speed 97MB/sec
Centos 7 without csf: speed 100+MB/sec
Centos 8 with csf: speed 10-11MB/sec
Centos 8 without csf: speed 100+MB/sec
As you can see with the same blocklists the transfer in centos 7 is about 10 times faster.
The vps is still online so i can provide any other information/debugging if needed.
Thank you