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I just got OpenVPN setup last night on my two
Windows XP machines, and I'm having throughput issues when I use TCP
encapsulation, but not with UDP encapsulation. Here are the
details:
I have two PCs configured with OpenVPN that share
the same subnet on a single gigabit ethernet switch. The server's IP is
192.168.0.1 and the client's IP is 192.168.0.210. I tested
throughput by copying a 62.8 MB file in three different
configurations.
1) With no tunnel. The file transfer took about 2
seconds, which is roughly 32Mbps
2) With a UDP tunnel with no encryption. The
file transfer took 18 seconds, which is about 3.65Mbps.
3) With a TCP tunnel with no encryption. The file
transfer took 370 seconds, which is about 177Kbps.
Here are my configs:
#########################
## SERVER
auth none
cipher none
tun-mtu
1500
tun-mtu-extra 32
mssfix 1400
port 443
proto tcp
dev
tun
ca ca.crt
cert server.crt
key server.key
dh dh1024.pem
server
10.8.0.0 255.255.255.0
ifconfig-pool-persist ipp.txt
push "route
192.168.10.0 255.255.255.0"
push "route 192.168.20.0 255.255.255.0"
push
"dhcp-option DNS 4.2.2.2"
keepalive 10
120
persist-key
persist-tun
status openvpn-status.log
verb
4
## CLIENT
auth none
cipher none
tun-mtu
1500
tun-mtu-extra 32
mssfix 1400
client
dev tun
proto
tcp
remote 192.168.0.1 443
resolv-retry
infinite
nobind
persist-key
persist-tun
ca ca.crt
cert
client3.crt
key client3.key
verb 3
#########################
I had very similar results when I turned on
encryption, so I figured it would be easier to troubleshoot with it turned off.
Let me know if you guys want me to change or test
anything.
Thanks in advance,
Brian
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