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    OpenVPN Slow - local network test

    Scheduled Pinned Locked Moved OpenVPN
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    • S
      spyder0552 @Rico
      last edited by

      @Rico

      [2.4.5-RELEASE][admin@pfSense.seradex.local]/root: openvpn --genkey --secret /tm p/secret
      [2.4.5-RELEASE][admin@pfSense.seradex.local]/root: time openvpn --test-crypto -- secret /tmp/secret --verb 0 --tun-mtu 20000 --cipher aes-128-gcm
      Fri Jun 19 14:47:16 2020 disabling NCP mode (--ncp-disable) because not in P2MP client or server mode
      10.007u 0.000s 0:10.00 100.0% 843+177k 0+0io 0pf+0w
      [2.4.5-RELEASE][admin@pfSense.seradex.local]/root:

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      • S
        spyder0552 @spyder0552
        last edited by

        @spyder0552
        Also just did a test one using UDP and setting the tunnel size to 9000....but still same results

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        • RicoR
          Rico LAYER 8 Rebel Alliance
          last edited by

          Hmm with this output I'd expect more than ~165 Mbps but you will never get to 1 Gbps with this CPU and OpenVPN, not even close.
          Run again your iperf via the tunnel and check top -aSH - does the OpenVPN process run close to 100%?
          Also for testing try with Encryption Algorithm set to None and try iperf via the tunnel again.

          -Rico

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          • S
            spyder0552 @Rico
            last edited by

            @Rico
            From what I see, no where near any cpu usage
            Top.png

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            • S
              spyder0552 @spyder0552
              last edited by

              @spyder0552
              Back on this again now. Anyone have suggestions?
              This is all on the same network using Cat6 cables. Just testing from a laptop to the wall to a device on the other side.
              No VPN - Speed is fantastic.
              OpenVPN tunnel - speed is pathetic.

              Any help would be appreciated before I have to dump this and look to another solution. I just can't believe that OpenVPN can't handle at least 400-600 Mbs.

              Thanks all.

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              • RicoR
                Rico LAYER 8 Rebel Alliance
                last edited by

                Did you try with Encryption Algorithm set to None for testing?
                If you really aim for highspeed VPN traffic I think you need to try with IPsec. 😐

                -Rico

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                • johnpozJ
                  johnpoz LAYER 8 Global Moderator
                  last edited by

                  I'm about ready to head out - but I I want to try and see what my 4860 can do via this local sort of testing.. If find some time will do a local only test..

                  An intelligent man is sometimes forced to be drunk to spend time with his fools
                  If you get confused: Listen to the Music Play
                  Please don't Chat/PM me for help, unless mod related
                  SG-4860 24.11 | Lab VMs 2.8, 24.11

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                  • S
                    spyder0552 @johnpoz
                    last edited by

                    @johnpoz
                    Hi all.
                    So, still having the same issue. I have now setup a home lab and get the exact same results.
                    Test Lab:
                    Intel i5 with 32Gb Ram.
                    Using Windows HyperV as the host.
                    Pfsense and Windows10 as guest machines.

                    Test 1 = laptop -> Firewall -> Windows 10
                    Get ~900 Mb/s

                    Test 2 = Laptop with OpenVP -> Firewall -> Windows 10
                    Get ~ 170 Mb/s

                    This is the same results I am seeing at my office using Dell R610 with 24 CPU Xenon's.

                    Things I have tried:

                    1. Enable/disable the network options Hardware TCP Seg and Large Receive Offload (check box set to disable them).
                    2. Enable fast I/O (with it turned off, I go down to ~155-160)...so currently enabled.
                    3. Snd/rcv buffers. Tried default and 2Mb. No significant change.
                    4. Encryption at AES-128-CBC and GCM. No significant change.

                    So for anyone that wants to setup my test enviroment:

                    1. Just setup a HyperV box.
                    2. Add 2 virtual switches (one external and one internal).
                    3. Create a VM for Pfsense and give it both virtual switches (WAN = External, LAN = Internal switch).
                    4. Create a VM for a test box
                    5. Put Iperf on the test box
                    6. Create your PFsense with default OpenVPN (using TLS). Just run through the wizard.

                    I am sure if someone did this they would get to the same spot I am where the speed is just no where at what it should be capable of.
                    You can rule the hardware out to some extent as testing without the VPN shows near full speed (meaning the nics are talking to each other properly).

                    Anyone willing to try my test?

                    johnpozJ 1 Reply Last reply Reply Quote 0
                    • S
                      spyder0552 @Rico
                      last edited by

                      @Rico
                      Hey, just replied below. Yes, I did try that on Friday and it did not make a difference.

                      Is anyone out there trying this with Windows 10 clients? Perhaps this is a windows issue?

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                      • PippinP
                        Pippin
                        last edited by

                        @spyder0552 said in OpenVPN Slow - local network test:

                        [2.4.5-RELEASE][admin@pfSense.seradex.local]/root: openvpn --genkey --secret /tm p/secret
                        [2.4.5-RELEASE][admin@pfSense.seradex.local]/root: time openvpn --test-crypto -- secret /tmp/secret --verb 0 --tun-mtu 20000 --cipher aes-128-gcm
                        Fri Jun 19 14:47:16 2020 disabling NCP mode (--ncp-disable) because not in P2MP client or server mode
                        10.007u 0.000s 0:10.00 100.0% 843+177k 0+0io 0pf+0w
                        [2.4.5-RELEASE][admin@pfSense.seradex.local]/root:

                        By the looks of that ^^^ it theoretically could do ~320Mbps

                        How about testing both ways? (client>server - server>client)
                        Which I5 is that?

                        Your top -aSH screenshot is timed wrong, ..... I guess.

                        I gloomily came to the ironic conclusion that if you take a highly intelligent person and give them the best possible, elite education, then you will most likely wind up with an academic who is completely impervious to reality.
                        Halton Arp

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                        • S
                          spyder0552 @Pippin
                          last edited by

                          @Pippin
                          Home test lab is i5-4690K (yeah..little dated...best I can get atm).

                          I can't really get it to test from the inside out. The wall seems to be blocking it out. I guess the IP I would connect to would be the end point of the tunel...but not working it seems.

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                          • PippinP
                            Pippin
                            last edited by

                            You can reverse test mode by using iperf3 -R
                            "-R, Reverse test mode – Server sends, client receives"

                            I gloomily came to the ironic conclusion that if you take a highly intelligent person and give them the best possible, elite education, then you will most likely wind up with an academic who is completely impervious to reality.
                            Halton Arp

                            S 1 Reply Last reply Reply Quote 0
                            • S
                              spyder0552 @Pippin
                              last edited by spyder0552

                              @Pippin
                              WOW...actually slower in reverse. Averaged only 100 Mb/s

                              But if I drop the VPN and just go through the firewall, it goes up to 900

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                              • S
                                spyder0552 @spyder0552
                                last edited by

                                @spyder0552
                                Just to show the config on the client/server side
                                Client:
                                dev tun
                                persist-tun
                                persist-key
                                cipher AES-128-GCM
                                ncp-ciphers AES-128-GCM
                                auth SHA256
                                tls-client
                                client
                                resolv-retry infinite
                                remote 192.168.2.98 1194 udp4
                                verify-x509-name "OpenVPN-Server-Cert" name
                                auth-user-pass
                                pkcs12 pfSense-UDP4-1194-vpn.p12
                                tls-crypt pfSense-UDP4-1194-vpn-tls.key
                                remote-cert-tls server

                                Server:
                                dev ovpns1
                                verb 1
                                dev-type tun
                                dev-node /dev/tun1
                                writepid /var/run/openvpn_server1.pid
                                #user nobody
                                #group nobody
                                script-security 3
                                daemon
                                keepalive 10 60
                                ping-timer-rem
                                persist-tun
                                persist-key
                                proto udp4
                                cipher AES-128-GCM
                                auth SHA256
                                up /usr/local/sbin/ovpn-linkup
                                down /usr/local/sbin/ovpn-linkdown
                                client-connect /usr/local/sbin/openvpn.attributes.sh
                                client-disconnect /usr/local/sbin/openvpn.attributes.sh
                                local 192.168.2.98
                                tls-server
                                server 192.168.99.0 255.255.255.0
                                client-config-dir /var/etc/openvpn-csc/server1
                                username-as-common-name
                                plugin /usr/local/lib/openvpn/plugins/openvpn-plugin-auth-script.so /usr/local/sbin/ovpn_auth_verify_async user TG9jYWwgRGF0YWJhc2U= false server1 1194
                                tls-verify "/usr/local/sbin/ovpn_auth_verify tls 'OpenVPN-Server-Cert' 1"
                                lport 1194
                                management /var/etc/openvpn/server1.sock unix
                                push "route 192.168.1.0 255.255.255.0"
                                push "dhcp-option DOMAIN test.local"
                                push "dhcp-option DNS 8.8.8.8"
                                client-to-client
                                ca /var/etc/openvpn/server1.ca
                                cert /var/etc/openvpn/server1.cert
                                key /var/etc/openvpn/server1.key
                                dh /etc/dh-parameters.2048
                                tls-crypt /var/etc/openvpn/server1.tls-crypt
                                ncp-ciphers AES-128-GCM
                                persist-remote-ip
                                float
                                topology subnet
                                fast-io

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                                • johnpozJ
                                  johnpoz LAYER 8 Global Moderator @spyder0552
                                  last edited by

                                  @spyder0552 said in OpenVPN Slow - local network test:

                                  Just setup a HyperV box.

                                  That doesn't seem like a legit test.. My test will be this

                                  windows 10 PC --- sg4860--- NAS

                                  Will set this up later.. But you don't show any of the mtu settings or txqueuelen..

                                  An intelligent man is sometimes forced to be drunk to spend time with his fools
                                  If you get confused: Listen to the Music Play
                                  Please don't Chat/PM me for help, unless mod related
                                  SG-4860 24.11 | Lab VMs 2.8, 24.11

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                                  • johnpozJ
                                    johnpoz LAYER 8 Global Moderator
                                    last edited by johnpoz

                                    Ok I just set this up...

                                    With default everything on open seeing..

                                    $ iperf3 -c 192.168.9.10
                                    warning: Ignoring nonsense TCP MSS 334848
                                    Connecting to host 192.168.9.10, port 5201
                                    [  5] local 10.0.100.2 port 52251 connected to 192.168.9.10 port 5201
                                    [ ID] Interval           Transfer     Bitrate
                                    [  5]   0.00-1.00   sec  25.5 MBytes   214 Mbits/sec
                                    [  5]   1.00-2.00   sec  29.5 MBytes   248 Mbits/sec
                                    [  5]   2.00-3.00   sec  32.4 MBytes   272 Mbits/sec
                                    [  5]   3.00-4.00   sec  31.1 MBytes   261 Mbits/sec
                                    [  5]   4.00-5.00   sec  29.5 MBytes   247 Mbits/sec
                                    [  5]   5.00-6.00   sec  30.8 MBytes   258 Mbits/sec
                                    [  5]   6.00-7.00   sec  30.6 MBytes   257 Mbits/sec
                                    [  5]   7.00-8.00   sec  31.6 MBytes   265 Mbits/sec
                                    [  5]   8.00-9.00   sec  31.0 MBytes   260 Mbits/sec
                                    [  5]   9.00-10.00  sec  32.0 MBytes   268 Mbits/sec
                                    - - - - - - - - - - - - - - - - - - - - - - - - -
                                    [ ID] Interval           Transfer     Bitrate
                                    [  5]   0.00-10.00  sec   304 MBytes   255 Mbits/sec                  sender
                                    [  5]   0.00-10.01  sec   304 MBytes   255 Mbits/sec                  receiver
                                    

                                    Let me see if can tweak that a bit..

                                    win10 pc (192.168.200.10) --- switch - 192.168.200.1 (test igb4) pfsense (sg4860) ( igb0 lan) 192.168.9.253 -- switch -- 192.168.9.10 (NAS)

                                    Tweaking didn't make much difference to be honest, but using aes-128-gcm vs cbc was huge difference.. When changed to cbc vs gcm when to 130 vs mid 200's

                                    An intelligent man is sometimes forced to be drunk to spend time with his fools
                                    If you get confused: Listen to the Music Play
                                    Please don't Chat/PM me for help, unless mod related
                                    SG-4860 24.11 | Lab VMs 2.8, 24.11

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                                    • S
                                      spyder0552 @johnpoz
                                      last edited by

                                      @johnpoz
                                      Thanks for doing the testing.
                                      I am surprised to see that the best we can get on a full 1Gb/s link is ~250 Mb/s
                                      So I guess my ~150Mb/s on the first crack is not horrible?

                                      I know there is overhead to deal with...just surprised it is so much. This is looking like a 70% loss of speed using OpenVpn.
                                      Is this what others are seeing as well?

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                                      • johnpozJ
                                        johnpoz LAYER 8 Global Moderator
                                        last edited by

                                        openvpn is single threaded.. its easy to use - its never been "speedy" ;)

                                        Keep in mind my sg4860, not a rocketship vpn endpoint concentrater either..

                                        It has enough umph to get the job done with lower power requirements.. But prob not what I would use for my vpn endpoint if what I wanted to as much throughput as possible.. Nor would openvpn be my first choice in that area - ipsec is better geared for throughput..

                                        Openvpn advantage is ease of use, and deployment, etc.

                                        But overall your sort of test with everything on the same vm host is not really a valid sort of testing.. It works for poc, etc. But its not going to be a good indicator of what sort of bandwidth you could expect when using in the real world..

                                        An intelligent man is sometimes forced to be drunk to spend time with his fools
                                        If you get confused: Listen to the Music Play
                                        Please don't Chat/PM me for help, unless mod related
                                        SG-4860 24.11 | Lab VMs 2.8, 24.11

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                                        • PippinP
                                          Pippin
                                          last edited by

                                          But overall your sort of test with everything on the same vm host is not really a valid sort of testing

                                          Yes I think so too.
                                          Looking at the hardware it should be capable of more.
                                          .

                                          Nor would openvpn be my first choice in that area

                                          Wait a bit, who knows ;)

                                          I gloomily came to the ironic conclusion that if you take a highly intelligent person and give them the best possible, elite education, then you will most likely wind up with an academic who is completely impervious to reality.
                                          Halton Arp

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                                          • johnpozJ
                                            johnpoz LAYER 8 Global Moderator
                                            last edited by

                                            @Pippin said in OpenVPN Slow - local network test:

                                            Wait a bit, who knows ;)

                                            If the goal was pure throughput, openvpn would not be on the top of the list of choices.. It has many other attributes it shines at.. But if what I am looking for is closest to line speed using least amount of horsepower.. Then no its not on the top of really any list ;)

                                            An intelligent man is sometimes forced to be drunk to spend time with his fools
                                            If you get confused: Listen to the Music Play
                                            Please don't Chat/PM me for help, unless mod related
                                            SG-4860 24.11 | Lab VMs 2.8, 24.11

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