[SOLVED] Wireguard VPN Speedtest Slow

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hafren
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Joined: 19 Dec 2012
Posts: 28
PostPosted: Tue Sep 12, 2023 21:04    Post subject: [SOLVED] Wireguard VPN Speedtest Slow Reply with quote
I have a newly setup wireguard vpn using ddwrt routers as server and client. When running a speedtest I get download speeds of 10Mbps which is only 30% of the host client 30Mbps or host server 30Mbps speeds. When using wireguard with a vpn provider I see very little drop in speed. Is this to be expected or is there something I should explore in the client or server setups?
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uvz123a
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Joined: 01 May 2023
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PostPosted: Tue Sep 12, 2023 21:46    Post subject: Reply with quote
You are probably on xDSL with PPPoE? Set MTU to 1420 (or 1400) on both sides.
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egc
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Joined: 18 Mar 2014
Posts: 12487
Location: Netherlands
PostPosted: Wed Sep 13, 2023 6:09    Post subject: Reply with quote
What is the up and download speed of the isp for both routers.

Are you using PPPoE in the loop?

What routers are involved?

What buildnumbers are they running.

Post screenshots of the WireGuard page of both routers.
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Routers:Netgear R7000, R6400v1, R6400v2, EA6900 (XvortexCFE), E2000, E1200v1, WRT54GS v1.
Install guide R6400v2, R6700v3,XR300:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
Install guide R7800/XR500: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
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hafren
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Joined: 19 Dec 2012
Posts: 28
PostPosted: Wed Sep 13, 2023 20:50    Post subject: Reply with quote
egc wrote:
What is the up and download speed of the isp for both routers.

Client down 35Mbps up 5Mbps
Server down 350Mbps up 10Mbps

egc wrote:
Are you using PPPoE in the loop?

No
egc wrote:
What routers are involved?

Client Netgear R6700v3 - DD-WRT v3.0-r51530
Server Netgear R6700v3 - DD-WRT v3.0-r51530
egc wrote:
What buildnumbers are they running.

Client DD-WRT v3.0-r51530
Server DD-WRT v3.0-r51530
egc wrote:
Post screenshots of the WireGuard page of both routers.

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ho1Aetoo
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Joined: 19 Feb 2019
Posts: 2597
Location: Germany
PostPosted: Thu Sep 14, 2023 6:05    Post subject: Reply with quote
If your server has only 10Mbit upload then your client has also maximum 10Mbit download.
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egc
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Joined: 18 Mar 2014
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Location: Netherlands
PostPosted: Thu Sep 14, 2023 6:19    Post subject: Reply with quote
So your wg speed between both routers is 10/5 Mb/s as the clients download is the servers upload.

Your settings are fine, you can disable NAT via tunnel on the client as the server has the clients subnet in the allowed ips, at least if 192.168.5.0/24 is the clients subnet.
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Routers:Netgear R7000, R6400v1, R6400v2, EA6900 (XvortexCFE), E2000, E1200v1, WRT54GS v1.
Install guide R6400v2, R6700v3,XR300:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
Install guide R7800/XR500: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087
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hafren
DD-WRT Novice


Joined: 19 Dec 2012
Posts: 28
PostPosted: Thu Sep 14, 2023 20:39    Post subject: Reply with quote
egc wrote:
the server has the clients subnet in the allowed ips, at least if 192.168.5.0/24 is the clients subnet.

Yes it is

egc wrote:
the clients download is the servers upload

Thanks for your wisdom - I should have thought more about it Embarassed as it's clearly limited by server upload and client download. Maybe something to put in the WG server guide to help other chumps Sad
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