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Trying to get wireguard vpn test working and I'm stuck. Any suggestions about what to check next would be appreciated.
Server is a DO droplet running Ubuntu with 3.13.0-141 kernel, client is desktop kvm guest running Mint with 4.4.0-112 kernel and bridged network connection behind nat router. The client can ping the server ok but any other packet types seem to get lost, though tcpdump shows lots of packets arriving at wg0 on the server. ip_forward and proxy_arp are enabled on the server as suggested in this post. ufw on the server has the tunnel port open. The server is also running openvpn on other ports.
Using wg-quick with these config files.
Client:
[Interface]
Address = 10.0.0.200
DNS = 8.8.8.8
PrivateKey = UJeiJJvi5NdqiBrgBfsim+ZS4c69M5EP5fUNNIXMy08=
[Peer]
PublicKey = MreTtFUDB5bQfkegxX2cvz3BLC9sybK4y0loTKhVunU=
AllowedIPs = 0.0.0.0/0
Endpoint = 159.203.227.235:51820
sudo wg-quick up ./wg0.conf
[sudo] password for jim:
[#] ip link add wg0 type wireguard
[#] wg setconf wg0 /dev/fd/63
[#] ip address add 10.0.0.200 dev wg0
[#] ip link set mtu 1420 dev wg0
[#] ip link set wg0 up
[#] resolvconf -a tun.wg0 -m 0 -x
[#] wg set wg0 fwmark 51820
[#] ip -4 route add 0.0.0.0/0 dev wg0 table 51820
[#] ip -4 rule add not fwmark 51820 table 51820
[#] ip -4 rule add table main suppress_prefixlength 0
Server:
[Interface]
Address = 10.0.0.201
SaveConfig = true
ListenPort = 51820
PrivateKey = 6GBAE7bFjrOfEp1uWiPvoW+5CyfpjsBmK0/vCIWbGl0=
[Peer]
PublicKey = furwAmh4vbKrLAGZG/QDIUT2a1GLi0WxDY6YdQKzIHE=
AllowedIPs = 10.0.0.200/32
sudo wg-quick up ./wg0.conf
[#] ip link add wg0 type wireguard
[#] wg setconf wg0 /dev/fd/63
[#] ip link set mtu 1420 dev wg0
[#] ip link set wg0 up
[#] ip route add 10.0.0.200/32 dev wg0
ip route show table all
default via 159.203.224.1 dev eth0
10.0.0.200 dev wg0 scope link
10.12.0.0/16 dev eth0 proto kernel scope link src 10.12.0.5
159.203.224.0/20 dev eth0 proto kernel scope link src 159.203.227.235
172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1
broadcast 10.12.0.0 dev eth0 table local proto kernel scope link src 10.12.0.5
local 10.12.0.5 dev eth0 table local proto kernel scope host src 10.12.0.5
broadcast 10.12.255.255 dev eth0 table local proto kernel scope link src 10.12.0.5
broadcast 127.0.0.0 dev lo table local proto kernel scope link src 127.0.0.1
local 127.0.0.0/8 dev lo table local proto kernel scope host src 127.0.0.1
local 127.0.0.1 dev lo table local proto kernel scope host src 127.0.0.1
broadcast 127.255.255.255 dev lo table local proto kernel scope link src 127.0.0.1
broadcast 159.203.224.0 dev eth0 table local proto kernel scope link src 159.203.227.235
local 159.203.227.235 dev eth0 table local proto kernel scope host src 159.203.227.235
broadcast 159.203.239.255 dev eth0 table local proto kernel scope link src 159.203.227.235
broadcast 172.17.0.0 dev docker0 table local proto kernel scope link src 172.17.0.1
local 172.17.0.1 dev docker0 table local proto kernel scope host src 172.17.0.1
broadcast 172.17.255.255 dev docker0 table local proto kernel scope link src 172.17.0.1
fe80::/64 dev eth0 proto kernel metric 256
fe80::/64 dev veth215195c proto kernel metric 256
fe80::/64 dev docker0 proto kernel metric 256
unreachable default dev lo table unspec proto kernel metric 4294967295 error -101
local ::1 dev lo table local proto none metric 0
local fe80::42:2fff:fec9:400 dev lo table local proto none metric 0
local fe80::601:d8ff:febf:4701 dev lo table local proto none metric 0
local fe80::84ce:13ff:feaf:f628 dev lo table local proto none metric 0
ff00::/8 dev eth0 table local metric 256
ff00::/8 dev veth215195c table local metric 256
ff00::/8 dev docker0 table local metric 256
unreachable default dev lo table unspec proto kernel metric 4294967295 error -101
solved my problem. seems like UFW blocks forwarding by default. would you mind sharing the blog you got this from? – Gaia – 2018-06-14T04:42:56.643