@item You have got @code{wlan0} NIC with 192.168.0/24 network on it.
@item You want to create virtual encrypted and authenticated 172.16.0/24
network and use it as a default transport.
-@item @code{wlan0} MTU is 1500, 20 bytes overhead per IPv4. So MTU for
-GoVPN is 1500 - 20 - 8 = 1472.
-@item During startup client and server will say that TAP interface MTU
-is 1432.
+@item Assume that outgoing GoVPN packets can be fragmented, so we do not
+bother configuring MTU of TUN/TAP interfaces. For better performance just
+lower it and check that no fragmentation of outgoing UDP packets occurs.
@end itemize
@strong{Install}. At first you must @ref{Installation, install} this
@strong{Prepare the client}. Generate client's verifier for Alice as an
example:
+
@verbatim
client% ./utils/newclient.sh Alice
-Enter passphrase:
-Your client verifier is: $argon2d$m=4096,t=128,p=1$bwR5VjeCYIQaa8SeaI3rqg
+Passphrase:
+Your client verifier is: $balloon$s=32768,t=16,p=2$bwR5VjeCYIQaa8SeaI3rqg
-Place the following JSON configuration entry on the server's side:
+Place the following YAML configuration entry on the server's side:
- "Alice": {
- "up": "/path/to/up.sh",
- "verifier": "$argon2d$m=4096,t=128,p=1$bwR5VjeCYIQaa8SeaI3rqg$KCNIqfS4DGsBTtVytamAzcISgrlEWvNxan1UfBrFu10"
- }
+ Alice:
+ up: /path/to/up.sh
+ iface: or TUN/TAP interface name
+ verifier: $balloon$s=32768,t=16,p=2$bwR5VjeCYIQaa8SeaI3rqg$KCNIqfS4DGsBTtVytamAzcISgrlEWvNxan1UfBrFu10
+@end verbatim
-Verifier was generated with:
+@strong{Prepare the server}. Add this entry to @file{peers.yaml}
+configuration file:
- ./utils/storekey.sh /tmp/passphrase
- govpn-verifier -key /tmp/passphrase
+@verbatim
+Alice:
+ iface: tap10
+ verifier: $balloon$s=32768,t=16,p=2$bwR5VjeCYIQaa8SeaI3rqg$KCNIqfS4DGsBTtVytamAzcISgrlEWvNxan1UfBrFu10
@end verbatim
-@strong{Prepare the server}. Add this entry to @code{peers.json}
-configuration file.
-
@strong{Prepare network on GNU/Linux IPv4 server}:
-@example
-server% umask 077
-server% echo "#!/bin/sh" > /path/to/up.sh
-server% echo "echo tap10" >> /path/to/up.sh
+@verbatim
server% ip addr add 192.168.0.1/24 dev wlan0
-server% tunctl -t tap10
-server% ip link set mtu 1432 dev tap10
+server% ip tuntap add dev tap10 mode tap
server% ip addr add 172.16.0.1/24 dev tap10
server% ip link set up dev tap10
-@end example
+@end verbatim
@strong{Run server daemon itself}:
-@example
-server% govpn-server -bind 192.168.0.1:1194 -mtu 1472
-@end example
+@verbatim
+server% govpn-server -bind 192.168.0.1:1194
+@end verbatim
@strong{Prepare network on GNU/Linux IPv4 client}:
-@example
-client% umask 066
-client% utils/storekey.sh key.txt
+@verbatim
client% ip addr add 192.168.0.2/24 dev wlan0
-client% tunctl -t tap10
-client% ip link set mtu 1432 dev tap10
+client% ip tuntap add dev tap10 mode tap
client% ip addr add 172.16.0.2/24 dev tap10
client% ip link set up dev tap10
-client% ip route add default via 172.16.0.1
-@end example
+client% ip route add 0/1 via 172.16.0.1
+client% ip route add 128/1 via 172.16.0.1
+@end verbatim
@strong{Run client daemon itself}:
-@example
+@verbatim
client% govpn-client \
- -key key.txt \
- -verifier '$argon2d$m=4096,t=128,p=1$bwR5VjeCYIQaa8SeaI3rqg' \
+ -verifier '$balloon$s=32768,t=16,p=2$bwR5VjeCYIQaa8SeaI3rqg' \
-iface tap10 \
- -remote 192.168.0.1:1194 \
- -mtu 1472
-@end example
+ -remote 192.168.0.1:1194
+@end verbatim
@strong{FreeBSD IPv6 similar client-server example}:
-@example
+@verbatim
server% ifconfig em0 inet6 fe80::1/64
server% govpn-server -bind "fe80::1%em0"
-@end example
+@end verbatim
-@example
+@verbatim
client% ifconfig me0 inet6 -ifdisabled auto_linklocal
client% ifconfig tap10
-client% ifconfig tap10 inet6 fc00::2/96 mtu 1412 up
+client% ifconfig tap10 inet6 fc00::2/96 up
client% route -6 add default fc00::1
client% govpn-client \
- -key key.txt \
- -verifier '$argon2d$m=4096,t=128,p=1$bwR5VjeCYIQaa8SeaI3rqg' \
+ -verifier '$balloon$s=32768,t=16,p=2$bwR5VjeCYIQaa8SeaI3rqg' \
-iface tap10 \
-remote "[fe80::1%me0]":1194
-@end example
+@end verbatim