Re: [Openvpn-users] Openvpn slow on asymmetric connections

[George Thompson <georgegpn@xxxxxxxxxxxxx>]

My upsteam bandwidth is avaliable. There is nothing else using it up


This is the config for my openvpn server and client 

My server config: 

mode server 
local <Server's public ip here> 
port 443 
proto udp 
dev tap2 
ca ./keys/ca.crt 
cert ./keys/Kizaki2-vpn.crt 
key ./keys/Kizaki2-vpn.key 
dh ./keys/dh2048.pem 
--client-config-dir ./config 
server-bridge 10.216.228.201 255.255.255.0 10.216.228.50 10.216.228.59 
client-to-client 
push "keepalive 15 120" 
tls-auth ./keys/ta.key 0 
cipher aes-256-cbc 
max-clients 10 
persist-key 
persist-tun 
status openvpn-status.log 
log openvpn.log 
verb 3 
mute 20 
comp-lzo 
crl-verify ./keys/crl.pem 

My client's config-dir file on server: 

--ifconfig-push 10.216.228.217 255.255.255.0 
10.216.228.201 
push "redirect-gateway" 
push "dhcp-option DNS 82.165.183.251" 


My clients' config file 

client 
dev tap 
proto udp 
port 443 
remote <remote server's ip> 
persist-key 
persist-tun 
ca ca.crt 
cert KizakiIBM2897.crt 
key KizakiIBM2897.key 
ns-cert-type server 
tls-auth ta.key 1 
cipher aes-256-cbc 
verb 3 
mute 20 
comp-lzo 
nobind 
mlock

-----Original Message-----
>From: Jon Bendtsen <jon.bendtsen@xxxxxxxxxx>
>Sent: Jan 3, 2006 5:58 AM
>To: OpenVPN Users <openvpn-users@xxxxxxxxxxxxxxxxxxxxx>
>Subject: Re: [Openvpn-users] Openvpn slow on asymmetric connections
>
>Den tirsdag 3.jan kl. 11:13 skrev George Thompson:
>
>> Hi there,
>>
>> The problem I am having with Openvpn is that it is
>> slow on connections such as ADSL. It seems to be
>> limited by the upstream even thou I download more than
>> upload on it. It is set up using tap briding. I use
>> Openvpn in many locations. The server is located in
>> New York. It is on a 100 mbit/s connection. I tested
>> the connection, it really is 100 mbit/s symmetrical.
>> One of the locations I use the Openvpn client is at my
>> university. The university has a DS3, the speed
>> though the Openvpn tunnel there is about 10mbit/s
>> symmetrical. Back at home I just recently switched
>> over to Verizon's FIOS. Before I had Covad ADSL at
>> 1.5mbps/384kbps. The fastest I could download over
>> the Openvpn tunnel on this connection was close to 300
>> kbits/s. Which almost matches my upload speed of that
>> DSL. It could never use up the 1.5mbits/s the DSL had
>> avaliable. Now with FIOS I have 15mbits/2mbits. The
>> maximum thoughput I can get with Openvpn on this
>> connection is around 1.6 mbit/s, which closly matches
>> the upload of the FIOS. Is there anything I can do to
>> get Openvpn to use the downsteam bandwidth I have? I
>> could really use it, if it's possible. I tried
>> playing with the MTU msfix and fragment setting with
>> no luck. Even tried disable the encryption and lzo-
>> comp. That didn't do the trick either. If you guys
>> have any ideas please let me know.
>
>If your upload is filled your download will suffer. Do
>you run something besides your openvpn that
>uploads alot? like p2p?
>
>Do you use udp or tcp?
>
>
>JonB
>
>
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