Category Archives: Linux networking

wireguard-ui without docker

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wget wireguard-ui:
https://github.com/ngoduykhanh/wireguard-ui/releases

tar -xvzf wireguard-ui-*.tar.gz
mkdir /opt/wireguard-ui
mv wireguard-ui /opt/wireguard-ui/

vim /opt/wireguard-ui/.env
SESSION_SECRET=
WGUI_USERNAME=
WGUI_PASSWORD=

vim /opt/wireguard-ui/postup.sh
#!/usr/bin/bash
# /opt/wireguard-ui/postup.sh
ufw route allow in on wg0 out on eth0
iptables -t nat -I POSTROUTING -o eth0 -j MASQUERADE

vim /opt/wireguard-ui/postdown.sh
#!/usr/bin/bash
# /opt/wireguard-ui/postdown.sh
ufw route delete allow in on wg0 out on eth0
iptables -t nat -D POSTROUTING -o eth0 -j MASQUERADE

chmod +x /opt/wireguard-ui/post*.sh

vim /etc/systemd/system/wireguard-ui-daemon.service
[Unit]
Description=WireGuard UI Daemon
Wants=network-online.target
After=network-online.target

[Service]
User=root
Group=root
Type=simple

systemctl daemon-reload
systemctl start wireguard-ui-daemon.service

vim /etc/systemd/system/wgui.service
[Unit]
Description=Restart WireGuard
After=network.target

[Service]
Type=oneshot
ExecStart=/usr/bin/systemctl restart [email protected]

[Install]
RequiredBy=wgui.path

vim /etc/systemd/system/wgui.path
[Unit]
Description=Watch /etc/wireguard/wg0.conf for changes

[Path]
PathModified=/etc/wireguard/wg0.conf

[Install]
WantedBy=multi-user.target

systemctl daemon-reload
systemctl enable wgui.{path,service}
systemctl start wgui.{path,service}

Nginx proxy:

add_header Cache-Control no-cache;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header Host $http_host;
proxy_pass http://127.0.0.1:5000/;

wireguard 2 interfaces not workig

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vim /etc/wireguard/wg0.conf

[Interface]
Address = 10.0.0.1/24
ListenPort = 51820
PrivateKey = WG0_SERVER_PRIVATE_KEY
SaveConfig = false

[Peer]
# client1
PublicKey = PUBKEY_FROM_CLIENT_ONE
AllowedIPs = 10.0.0.2/32

vim /etc/wireguard/wg1.conf

[Interface]
Address = 10.0.1.1/24
ListenPort = 51821
PrivateKey = WG1_SERVER_PRIVATE_KEY
SaveConfig = false

[Peer]
# client2
PublicKey = PUBKEY_FROM_CLIENT_TWO
AllowedIPs = 10.0.1.2/32

systemctl start wg-quick@wg0
systemctl start wg-quick@wg1

wireguard setup

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add-apt-repository ppa:wireguard/wireguard
apt-get update
apt install wireguard

MacOS
brew install wireguard-tools

wg genkey | tee privatekey | wg pubkey > publickey

Server side:
/etc/wireguard/wg0.conf

[Interface]
Address = 10.0.0.1/24
DNS = 1.1.1.1
PrivateKey = [ServerPrivateKey]
ListenPort = 51820
PostUp = iptables -A FORWARD -i %i -j ACCEPT; iptables -A FORWARD -o %i -j ACCEPT; iptables -t nat -A POSTROUTING -o enp9s0 -j MASQUERADE
PostDown = iptables -D FORWARD -i %i -j ACCEPT; iptables -D FORWARD -o %i -j ACCEPT; iptables -t nat -D POSTROUTING -o enp9s0 -j MASQUERADE

[Peer]
#Peer #1
PublicKey = [Peer#1PublicKey]
AllowedIPs = 10.0.0.3/32

[Peer]
#Peer #2
PublicKey = [Peer#2PublicKey]
AllowedIPs = 10.0.0.10/32

[Peer]
#Peer #3
PublicKey = [Peer#3PublicKey]
AllowedIPs = 10.0.0.2/32

[Peer]
#Peer #4
PublicKey = [Peer#4PublicKey]
AllowedIPs = 10.0.0.11/32

Client side:
/etc/wireguard/wg0.conf

[Interface]
Address = 10.0.0.3/24
PrivateKey = [PrivateKeyPeer#1]

[Peer]
PublicKey = [ServerPublicKey]
Endpoint = some.domain.com:51820
AllowedIPs = 0.0.0.0/0

# This is for if you're behind a NAT and
# want the connection to be kept alive.
PersistentKeepalive = 25

Start/stop interface
wg-quick up wg0
wg-quick down wg0

Start/stop service
$ sudo systemctl stop [email protected]
$ sudo systemctl start [email protected]

Instead of having to modify the file for every client you want to add to the
server you could also use the wg tool instead:

# add peer
wg set wg0 peer allowed-ips 10.0.0.x/32

# verify connection
wg

# save to config
wg-quick save wg0

The Portmapper service runs on port 111 tcp/udp

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ss -lntp | grep 111

LISTEN 0 128 *:111 *:* users:(("rpcbind",pid=816,fd=8))
LISTEN 0 128 [::]:111 [::]:* users:(("rpcbind",pid=816,fd=11))

pcinfo -p
program vers proto port service
100000 4 tcp 111 portmapper
100000 3 tcp 111 portmapper
100000 2 tcp 111 portmapper
100000 4 udp 111 portmapper
100000 3 udp 111 portmapper
100000 2 udp 111 portmapper

systemctl stop rpcbind.socket
rpcinfo -p
rpcinfo: can't contact portmapper: RPC: Remote system error - Connection refused

systemctl disable rpcbind