[Solved] Slow download speeds on Windows 7 x64

Samples of working configurations.
netsetter
OpenVpn Newbie
Posts: 7
Joined: Fri Feb 05, 2016 8:09 pm

[Solved] Slow download speeds on Windows 7 x64

Postby netsetter » Fri Feb 05, 2016 8:50 pm

Greetings. My download speeds without a VPN are 200+ Mbps. When I connect to my server with OpenVPN installed (it can download at 500+ Mbps) I get a max of 15 Mbps, and often less.

I'm running OpenVPN 2.3.10 x86_64-w64-mingw32 and have tried a variety of versions of TAP drivers, but they all get around the same speed. VirtualBox is installed (but I'm connecting to the VPN from the physical, non-virtualized desktop) and for a while if I unchecked the "VirtualBox Bridged Networking Driver" checkbox on the TAP Interface connection's properties (right-click, Networking tab) while the VPN was connected, I could get better speeds.

This may have been a red herring, because after disconnecting and reconnecting to the VPN, speeds would go right back to ~15 Mbps.

And in my attempts to resolve this issue, I upgraded VirtualBox to 5.0.14, and now the TAP interface has a different checkbox, named "VirtualBox NDIS6 Bridged Networking Driver" but checking or unchecking it has no effect. I've disabled all of the checkboxes exept for IPv4 just to rule anything else out.

I've tried using TCP (it got slower), changed ciphers and enabled/disabled lzo compression, but haven't found a way to significantly improve performance.

Here is the client conf:

Code: Select all

client
dev tun
proto udp
remote [redacted] 1194
resolv-retry infinite
nobind
persist-key
persist-tun
ca ca.crt
cert client1.crt
key client1.key
remote-cert-tls server
comp-lzo
verb 3


And server config:

Code: Select all

port 1194
proto udp
dev tun
ca ca.crt
cert MyVPN.crt
key MyVPN.key
dh dh2048.pem
server 10.8.0.0 255.255.255.0
ifconfig-pool-persist ipp.txt
push "redirect-gateway def1 bypass-dhcp"
push "dhcp-option DNS 8.8.8.8"
push "dhcp-option DNS 8.8.4.4"
keepalive 10 120
comp-lzo no
persist-key
persist-tun
status openvpn-status.log
verb 3


And the client log:

Code: Select all

Fri Feb 05 15:30:53 2016 OpenVPN 2.3.10 x86_64-w64-mingw32 [SSL (OpenSSL)] [LZO] [PKCS11] [IPv6] built on Feb  1 2016
Fri Feb 05 15:30:53 2016 Windows version 6.1 (Windows 7)
Fri Feb 05 15:30:53 2016 library versions: OpenSSL 1.0.1r  28 Jan 2016, LZO 2.09
Enter Management Password:
Fri Feb 05 15:30:53 2016 MANAGEMENT: TCP Socket listening on [AF_INET]127.0.0.1:25340
Fri Feb 05 15:30:53 2016 Need hold release from management interface, waiting...
Fri Feb 05 15:30:54 2016 MANAGEMENT: Client connected from [AF_INET]127.0.0.1:25340
Fri Feb 05 15:30:54 2016 MANAGEMENT: CMD 'state on'
Fri Feb 05 15:30:54 2016 MANAGEMENT: CMD 'log all on'
Fri Feb 05 15:30:54 2016 MANAGEMENT: CMD 'hold off'
Fri Feb 05 15:30:54 2016 MANAGEMENT: CMD 'hold release'
Fri Feb 05 15:30:54 2016 Socket Buffers: R=[8192->8192] S=[8192->8192]
Fri Feb 05 15:30:54 2016 UDPv4 link local: [undef]
Fri Feb 05 15:30:54 2016 UDPv4 link remote: [AF_INET]107.161.31.22:1194
Fri Feb 05 15:30:54 2016 MANAGEMENT: >STATE:1454704254,WAIT,,,
Fri Feb 05 15:30:54 2016 MANAGEMENT: >STATE:1454704254,AUTH,,,
Fri Feb 05 15:30:54 2016 TLS: Initial packet from [AF_INET]107.161.31.22:1194, sid=6615a814 25171a60
Fri Feb 05 15:30:54 2016 VERIFY OK: depth=1, C=US, ST=CA, L=SanFrancisco, O=MyVPN, OU=MyVPN, CN=MyVPN CA, name=MyVPN, emailAddress=me@example.com
Fri Feb 05 15:30:54 2016 Validating certificate key usage
Fri Feb 05 15:30:54 2016 ++ Certificate has key usage  00a0, expects 00a0
Fri Feb 05 15:30:54 2016 VERIFY KU OK
Fri Feb 05 15:30:54 2016 Validating certificate extended key usage
Fri Feb 05 15:30:54 2016 ++ Certificate has EKU (str) TLS Web Server Authentication, expects TLS Web Server Authentication
Fri Feb 05 15:30:54 2016 VERIFY EKU OK
Fri Feb 05 15:30:54 2016 VERIFY OK: depth=0, C=US, ST=CA, L=SanFrancisco, O=MyVPN, OU=MyVPN, CN=MyVPN, name=MyVPN, emailAddress=me@example.com
Fri Feb 05 15:30:55 2016 Data Channel Encrypt: Cipher 'BF-CBC' initialized with 128 bit key
Fri Feb 05 15:30:55 2016 Data Channel Encrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Fri Feb 05 15:30:55 2016 Data Channel Decrypt: Cipher 'BF-CBC' initialized with 128 bit key
Fri Feb 05 15:30:55 2016 Data Channel Decrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Fri Feb 05 15:30:55 2016 Control Channel: TLSv1, cipher TLSv1/SSLv3 DHE-RSA-AES256-SHA, 2048 bit RSA
Fri Feb 05 15:30:55 2016 [MyVPN] Peer Connection Initiated with [AF_INET]107.161.31.22:1194
Fri Feb 05 15:30:56 2016 MANAGEMENT: >STATE:1454704256,GET_CONFIG,,,
Fri Feb 05 15:30:57 2016 SENT CONTROL [MyVPN]: 'PUSH_REQUEST' (status=1)
Fri Feb 05 15:30:57 2016 PUSH: Received control message: 'PUSH_REPLY,redirect-gateway def1 bypass-dhcp,dhcp-option DNS 8.8.8.8,dhcp-option DNS 8.8.4.4,route 10.8.0.1,topology net30,ping 10,ping-restart 120,ifconfig 10.8.0.6 10.8.0.5'
Fri Feb 05 15:30:57 2016 OPTIONS IMPORT: timers and/or timeouts modified
Fri Feb 05 15:30:57 2016 OPTIONS IMPORT: --ifconfig/up options modified
Fri Feb 05 15:30:57 2016 OPTIONS IMPORT: route options modified
Fri Feb 05 15:30:57 2016 OPTIONS IMPORT: --ip-win32 and/or --dhcp-option options modified
Fri Feb 05 15:30:57 2016 ROUTE_GATEWAY 192.168.1.1/255.255.255.0 I=19 HWADDR=64:31:50:32:75:20
Fri Feb 05 15:30:57 2016 do_ifconfig, tt->ipv6=0, tt->did_ifconfig_ipv6_setup=0
Fri Feb 05 15:30:57 2016 MANAGEMENT: >STATE:1454704257,ASSIGN_IP,,10.8.0.6,
Fri Feb 05 15:30:57 2016 open_tun, tt->ipv6=0
Fri Feb 05 15:30:57 2016 TAP-WIN32 device [Local Area Connection 3] opened: \\.\Global\{43375603-876D-4D52-9EDA-CFA8A4F077D5}.tap
Fri Feb 05 15:30:57 2016 TAP-Windows Driver Version 9.9
Fri Feb 05 15:30:57 2016 Notified TAP-Windows driver to set a DHCP IP/netmask of 10.8.0.6/255.255.255.252 on interface {43375603-876D-4D52-9EDA-CFA8A4F077D5} [DHCP-serv: 10.8.0.5, lease-time: 31536000]
Fri Feb 05 15:30:57 2016 Successful ARP Flush on interface [38] {43375603-876D-4D52-9EDA-CFA8A4F077D5}
Fri Feb 05 15:31:02 2016 TEST ROUTES: 2/2 succeeded len=1 ret=1 a=0 u/d=up
Fri Feb 05 15:31:02 2016 C:\Windows\system32\route.exe ADD 107.161.31.22 MASK 255.255.255.255 192.168.1.1
Fri Feb 05 15:31:02 2016 ROUTE: CreateIpForwardEntry succeeded with dwForwardMetric1=10 and dwForwardType=4
Fri Feb 05 15:31:02 2016 Route addition via IPAPI succeeded [adaptive]
Fri Feb 05 15:31:02 2016 C:\Windows\system32\route.exe ADD 0.0.0.0 MASK 128.0.0.0 10.8.0.5
Fri Feb 05 15:31:02 2016 ROUTE: CreateIpForwardEntry succeeded with dwForwardMetric1=30 and dwForwardType=4
Fri Feb 05 15:31:02 2016 Route addition via IPAPI succeeded [adaptive]
Fri Feb 05 15:31:02 2016 C:\Windows\system32\route.exe ADD 128.0.0.0 MASK 128.0.0.0 10.8.0.5
Fri Feb 05 15:31:02 2016 ROUTE: CreateIpForwardEntry succeeded with dwForwardMetric1=30 and dwForwardType=4
Fri Feb 05 15:31:02 2016 Route addition via IPAPI succeeded [adaptive]
Fri Feb 05 15:31:02 2016 MANAGEMENT: >STATE:1454704262,ADD_ROUTES,,,
Fri Feb 05 15:31:02 2016 C:\Windows\system32\route.exe ADD 10.8.0.1 MASK 255.255.255.255 10.8.0.5
Fri Feb 05 15:31:02 2016 ROUTE: CreateIpForwardEntry succeeded with dwForwardMetric1=30 and dwForwardType=4
Fri Feb 05 15:31:02 2016 Route addition via IPAPI succeeded [adaptive]
Fri Feb 05 15:31:02 2016 Initialization Sequence Completed
Fri Feb 05 15:31:02 2016 MANAGEMENT: >STATE:1454704262,CONNECTED,SUCCESS,10.8.0.6,107.161.31.22


Help please :)

User avatar
Traffic
OpenVPN Protagonist
Posts: 4082
Joined: Sat Aug 09, 2014 11:24 am

Re: Slow download speeds on Windows 7 x64

Postby Traffic » Fri Feb 05, 2016 9:44 pm

Please see this:
https://community.openvpn.net/openvpn/wiki/Gigabit_Networks_Linux

I get exactly what I pay for .. you probably do too :ugeek:

netsetter
OpenVpn Newbie
Posts: 7
Joined: Fri Feb 05, 2016 8:09 pm

Re: Slow download speeds on Windows 7 x64

Postby netsetter » Fri Feb 05, 2016 10:38 pm

Does that mean I need to recompile OpenVPN to use the different SSL libraries? I'm running OpenSSL 1.0.1f 6 Jan 2014 currently. (Oh, and the server is running OpenVPN 2.3.10 i686-pc-linux-gnu).

I tried the new MTU, fragment and mssfix settings, but speeds were unchanged.

server.conf

Code: Select all

port 1194
proto udp
dev tun
ca ca.crt
cert MyVPN.crt
key MyVPN.key
dh dh2048.pem
server 10.8.0.0 255.255.255.0
ifconfig-pool-persist ipp.txt
push "redirect-gateway def1 bypass-dhcp"
push "dhcp-option DNS 8.8.8.8"
push "dhcp-option DNS 8.8.4.4"
keepalive 10 120
cipher aes-256-cbc
comp-lzo no
persist-key
persist-tun
status openvpn-status.log
verb 3
tun-mtu 6000
fragment 0
mssfix 0


client.conf

Code: Select all

client
dev tun
proto udp
remote 107.161.31.22 1194
resolv-retry infinite
nobind
persist-key
persist-tun
ca ca.crt
cert ram1.crt
key ram1.key
remote-cert-tls server
cipher aes-256-cbc
comp-lzo no
verb 3
tun-mtu 6000
fragment 0
mssfix 0

User avatar
Traffic
OpenVPN Protagonist
Posts: 4082
Joined: Sat Aug 09, 2014 11:24 am

Re: Slow download speeds on Windows 7 x64

Postby Traffic » Sat Feb 06, 2016 12:34 am

netsetter wrote:Does that mean I need to recompile OpenVPN
No .. as you can see from the link I posted, OpenVPN is quite capable of saturating your connection.

You are connected to networks which you do not control .. If you think you are not getting the speeds you pay for then ask the people you pay to explain why ..

I get exactly the up/down speeds that I pay for .. you probably do too.

netsetter
OpenVpn Newbie
Posts: 7
Joined: Fri Feb 05, 2016 8:09 pm

Re: Slow download speeds on Windows 7 x64

Postby netsetter » Sat Feb 06, 2016 7:15 pm

I hope that's not the case, but I have contacted my ISP to see if they throttle OpenVPN connections. I wonder if they would freely admit such a thing.

It doesn't seem to be throttled by port since different ports all exhibit the slow speeds. If they do throttle it using deep packet inspection, is there any recourse?

User avatar
Traffic
OpenVPN Protagonist
Posts: 4082
Joined: Sat Aug 09, 2014 11:24 am

Re: Slow download speeds on Windows 7 x64

Postby Traffic » Sat Feb 06, 2016 10:11 pm

Where is your client located in relation to your server ?

netsetter
OpenVpn Newbie
Posts: 7
Joined: Fri Feb 05, 2016 8:09 pm

Re: Slow download speeds on Windows 7 x64

Postby netsetter » Sun Feb 07, 2016 5:00 pm

Indianapolis is the client and Atlanta is the server. Ping times are about 45ms.

Marsi
OpenVpn Newbie
Posts: 1
Joined: Mon Feb 08, 2016 10:33 am

Re:Slow download speeds on Windows 7 x64

Postby Marsi » Mon Feb 08, 2016 10:35 am

You can check your Internet connection speed here whoer.net/speedtest

User avatar
Traffic
OpenVPN Protagonist
Posts: 4082
Joined: Sat Aug 09, 2014 11:24 am

Re: Slow download speeds on Windows 7 x64

Postby Traffic » Mon Feb 08, 2016 1:43 pm

Your client download speed over the VPN cannot exceed your server upload speed .. and may not even be able to use all your server upload speed as the server will be downloading at the same time.

netsetter
OpenVpn Newbie
Posts: 7
Joined: Fri Feb 05, 2016 8:09 pm

Re: Slow download speeds on Windows 7 x64

Postby netsetter » Mon Feb 08, 2016 11:54 pm

Oh man. I have a 200/15 connection. That means the most I can get on downloads with a VPN is 15 down?

That's exactly what I've been getting, but I never realized that was the limitation.

If so, you have simultaneously solved the mystery and dashed my hopes for a faster VPN connection.

User avatar
Traffic
OpenVPN Protagonist
Posts: 4082
Joined: Sat Aug 09, 2014 11:24 am

Re: Slow download speeds on Windows 7 x64

Postby Traffic » Tue Feb 09, 2016 12:16 am

netsetter wrote:Oh man. I have a 200/15 connection. That means the most I can get on downloads with a VPN is 15 down?
Nail on the Head. (Choose your own online definition provider)

Sorry for the dashing .. this is how networks function .. nothing we can do about it.

Thanks for taking the time to let us know we helped 8-)

netsetter
OpenVpn Newbie
Posts: 7
Joined: Fri Feb 05, 2016 8:09 pm

Re: Slow download speeds on Windows 7 x64

Postby netsetter » Tue Feb 09, 2016 12:39 am

Thanks for your help in setting me straight. At least now I know I'm getting the best speeds I can.

netsetter
OpenVpn Newbie
Posts: 7
Joined: Fri Feb 05, 2016 8:09 pm

Followup to "Slow download speeds on Windows 7 x64"

Postby netsetter » Sun Feb 14, 2016 5:09 pm

I just wanted to post an update to my previous post that the VPN speeds were not in fact limited by upload speeds as was discussed. I installed Ubuntu on a laptop and using the same network, I got speeds upwards of 100 Mbps over OpenVPN. My upload maxes out at 17 Mbps.

Now that I know VPN download is not limited to the ISP's upload speeds, I'm renewing my efforts to figure out why my Windows 7 desktop is getting such slow speeds.

Pippin
OpenVPN Power User
Posts: 187
Joined: Wed Jul 01, 2015 8:03 am

Re: Followup to "Slow download speeds on Windows 7 x64"

Postby Pippin » Sun Feb 14, 2016 6:04 pm

To clarify:
Indianapolis is the client and Atlanta is the server

I have a 200/15 connection

So, Indianapolis is 200/15 and max. out at 17.

it can download at 500+ Mbps

This is download speed of Atlanta.
Upload?

Now that I know VPN download is not limited to the ISP's upload speeds

If upload is 15 then you won`t get more then 15 :-)

User avatar
Traffic
OpenVPN Protagonist
Posts: 4082
Joined: Sat Aug 09, 2014 11:24 am

Re: [Solved] Slow download speeds on Windows 7 x64

Postby Traffic » Mon Feb 15, 2016 4:46 pm

netsetter wrote:Now that I know VPN download is not limited to the ISP's upload speeds, I'm renewing my efforts to figure out why my Windows 7 desktop is getting such slow speeds
If you believe OpenVPN can somehow sidestep your ISP enforced network speed limit then good luck .. :ugeek:


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