VPN traffic very slow as it crawls along

[anwoke8204]

Hi I have a fresh install of Debian. only other software on it other then softether is webmin. it also has a fresh install of softether vpn server on it. when ever I connect to it, my internet traffic slows down to a very slow crawl. like early dialup speeds slower then 56 kbs. how can i correct this so that traffic runs at normal speed. I am somewhat new to softether so any help would greatly be appreciated.

[solo]

Post your TrafficClient stats viewtopic.php?f=7&t=68834#p100955

[anwoke8204]

are those commands run on the vpn server or a windows system connected to the vpn.

[anwoke8204]

here are the results from the vpn server:

Code: Select all

vpncmd command - SoftEther VPN Command Line Management Utility
SoftEther VPN Command Line Management Utility (vpncmd command)
Version 4.42 Build 9798   (English)
Compiled 2023/06/30 11:06:58 by buildsan at crosswin with OpenSSL 3.0.9
Copyright (c) 2012-2023 SoftEther VPN Project. All Rights Reserved.

VPN Tools has been launched. By inputting HELP, you can view a list of the commands that can be used.

VPN Tools>TrafficClient speed.softether.com:9821
TrafficClient command - Run Network Traffic Speed Test Tool in Client Mode
Starting the client program...

-------------------------------------------------------
Network Traffic Speed Test Tool Client Setting Parameters

Destination Host Name               speed.softether.com
Destination TCP Port Number         9821
Number of TCP Connections to Establish 32
Data Transfer Direction             Full (Server < -- > Client)
Data Transmission Time              15.0 seconds
Data Correction for Ethernet Frames Yes
Measurement of Total Speed of Relay Device Input Output No
-------------------------------------------------------

The connection to server speed.softether.com (port 9821) will start. 32 TCP connections will be connected.
TCP connection number 1 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 2 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 3 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 4 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 5 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 6 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 7 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 8 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 9 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 10 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 11 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 12 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 13 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 14 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 15 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 16 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 17 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 18 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 19 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 20 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 21 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 22 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 23 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 24 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 25 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 26 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 27 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 28 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 29 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 30 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 31 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 32 has been connected.
        Data transfer direction: Upload (Client to Server)

All connections were established and so data transfer started.
Measurement Start Time: 2025-03-21 (Fri) 06:40:11
Scheduled Finish Time: 2025-03-21 (Fri) 06:40:26

Measuring in progress. Please wait...
(Do not use any other applications while measuring is in progress.)

Because 15.0 seconds or more have passed, the data communication will end.

The client program has beens terminated.


Network Traffic Speed Test Tool

Item Name                                             |      Normal View|Simplified View
------------------------------------------------------+-----------------+---------------
Time Span for Measurement                             |     00:00:15.008|
Data Correction for Ethernet Frames                   |              Yes|
Communication Data Volume in Download Direction       |106,920,476 Bytes|  106.92 MBytes
Communication Data Volume in Upload Direction         |263,916,220 Bytes|  263.92 MBytes
Total Communication Data Volume                       |370,836,696 Bytes|  370.84 MBytes
Relay Device Input Output Total Throughput Computation|               No|
Average Throughput in Download Direction              |   56,993,857 bps|     56.99 Mbps
Average Throughput in Upload Direction                |  140,680,287 bps|    140.68 Mbps
Total Average Throughput                              |  197,674,144 bps|    197.67 Mbps
The command completed successfully.

here is from my laptop:

Code: Select all

C:\Users\kacie>vpncmd /tools /cmd TrafficClient speed.softether.com:9821
vpncmd command - SoftEther VPN Command Line Management Utility
SoftEther VPN Command Line Management Utility (vpncmd command)
Version 4.43 Build 9799   (English)
Compiled 2023/08/31 10:50:49 by buildsan at crosswin with OpenSSL 3.0.9
Copyright (c) 2012-2023 SoftEther VPN Project. All Rights Reserved.

VPN Tools has been launched. By inputting HELP, you can view a list of the commands that can be used.

VPN Tools>TrafficClient speed.softether.com:9821
TrafficClient command - Run Network Traffic Speed Test Tool in Client Mode
Starting the client program...

-------------------------------------------------------
Network Traffic Speed Test Tool Client Setting Parameters

Destination Host Name               speed.softether.com
Destination TCP Port Number         9821
Number of TCP Connections to Establish 32
Data Transfer Direction             Full (Server < -- > Client)
Data Transmission Time              15.0 seconds
Data Correction for Ethernet Frames Yes
Measurement of Total Speed of Relay Device Input Output No
-------------------------------------------------------

The connection to server speed.softether.com (port 9821) will start. 32 TCP connections will be connected.
TCP connection number 1 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 2 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 3 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 4 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 5 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 6 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 7 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 8 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 9 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 10 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 11 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 12 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 13 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 14 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 15 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 16 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 17 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 18 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 19 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 20 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 21 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 22 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 23 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 24 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 25 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 26 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 27 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 28 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 29 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 30 has been connected.
        Data transfer direction: Upload (Client to Server)
TCP connection number 31 has been connected.
        Data transfer direction: Download (Server to Client)
TCP connection number 32 has been connected.
        Data transfer direction: Upload (Client to Server)

All connections were established and so data transfer started.
Measurement Start Time: 2025-03-21 (Fri) 06:48:29
Scheduled Finish Time: 2025-03-21 (Fri) 06:48:44

Measuring in progress. Please wait...
(Do not use any other applications while measuring is in progress.)

Because 15.0 seconds or more have passed, the data communication will end.

The client program has beens terminated.


Network Traffic Speed Test Tool

Item Name                                             |     Normal View|Simplified View
------------------------------------------------------+----------------+---------------
Time Span for Measurement                             |    00:00:15.011|
Data Correction for Ethernet Frames                   |             Yes|
Communication Data Volume in Download Direction       |   428,744 Bytes|  428.74 KBytes
Communication Data Volume in Upload Direction         |10,637,086 Bytes|   10.64 MBytes
Total Communication Data Volume                       |11,065,830 Bytes|   11.07 MBytes
Relay Device Input Output Total Throughput Computation|              No|
Average Throughput in Download Direction              |     228,495 bps|    228.50 Kbps
Average Throughput in Upload Direction                |   5,668,955 bps|      5.67 Mbps
Total Average Throughput                              |   5,897,450 bps|      5.90 Mbps
The command completed successfully.

I included the whole output incase you needed anything else from the command outputs. I only have the 2 as my laptop and the vpn client system are the same machine. the vpn server is roughly 50 miles away.

[solo]

I only have the 2 as my laptop and the cpn client system are the same machine.

That's why it is so slow, the network loop kills it. Make a proper VPN, test it out from another PC on a different ISP.

[anwoke8204]

The vpn server is in a remote location approx. 50 miles away. it does NOT run on my local network. When we were running the Softether VPN server on a windows Server 2022 machine, it worked perfect and fast. once I brought a Debian VM on a Proxmox host online and moved the server there it has been this slow. it cant be an issue with Proxmox as the Windows Server resides on the same host.

im not sure how to run the other speed test listed above since the client device and the pc it sys to run it on is the same machine. the windows server had 3 network interfaces, the Debian server only has 1.

[solo]

It's confusing, I'll annotate the above-linked info for you.

#1 TrafficClient from your VPN server to the speed server
[VPN on/off irrelevant]

#2 TrafficClient from a VPN client to the speed server
[VPN on]

#3 TrafficClient from the client's PC directly to the speed server
[VPN off]

Average Throughput in Download Direction | 1,128,980,684 bps| 1.13 Gbps
Average Throughput in Upload Direction | 1,139,082,463 bps| 1.14 Gbps
CPU 5%
[note THREE lines ONLY, including CPU USAGE]

[anwoke8204]

It's confusing, I'll annotate the above-linked info for you.

#1 TrafficClient from your VPN server to the speed server
[VPN on/off irrelevant]

#2 TrafficClient from a VPN client to the speed server
[VPN on]

#3 TrafficClient from the client's PC directly to the speed server
[VPN off]

Average Throughput in Download Direction | 1,128,980,684 bps| 1.13 Gbps
Average Throughput in Upload Direction | 1,139,082,463 bps| 1.14 Gbps
CPU 5%
[note THREE lines ONLY, including CPU USAGE]

in number 3 from my laptop to the remote vpn server thats where I am getting the following

Average Throughput in Download Direction | 228,495 bps| 228.50 Kbps
Average Throughput in Upload Direction | 5,668,955 bps| 5.67 Mbps
cpu at 27%

fr the second one where it says to run from a client connected to the speedserver can it be the client on the vpn server?