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A simple single-user SoftEther VPN server Docker image

Note: OpenVPN support is enabled on :latest image. STDOUT (docker log) format has changed as a result.


docker run -d --cap-add NET_ADMIN -p 500:500/udp -p 4500:4500/udp -p 1701:1701/tcp -p 1194:1194/udp siomiz/softethervpn

Connectivity tested on Android + iOS devices. It seems Android devices do not require L2TP server to have port 1701/tcp open.

The above example will accept connections from both L2TP/IPSec and OpenVPN clients at the same time.

Mix and match published ports:

  • -p 500:500/udp -p 4500:4500/udp -p 1701:1701/tcp for L2TP/IPSec
  • -p 1194:1194/udp for OpenVPN.


All optional:

  • -e PSK: Pre-Shared Key (PSK), if not set: "notasecret" (without quotes) by default.
  • -e USERS: Multiple usernames and passwords may be set with the following pattern: username:password;user2:pass2;user3:pass3. Username and passwords are separated by :. Each pair of username:password should be separated by ;. If not set a random username ("user[nnnn]") and a random weak password is created.

See the docker log for username and password (unless -e USERS is set), which would look like:

# ========================
# user6301
# 2329.2890.3101.2451.9875
# ========================

Dots (.) are part of the password. Password will not be logged if specified via -e USERS; use docker inspect in case you need to see it.

Hub & server are locked down; they are given stronger random passwords which are not logged or displayed.


docker run -d --cap-add NET_ADMIN -p 1194:1194/udp siomiz/softethervpn

The entire log can be saved and used as an .ovpn config file (change as needed).

Server CA certificate will be created automatically at runtime if it's not set. You can supply a self-signed 1024-bit RSA certificate/key pair created locally OR use the gencert script described below. Feed the keypair contents via -e CERT and -e KEY (use of --env-file is recommended). X.509 markers (like -----BEGIN CERTIFICATE-----) and any non-BASE64 character (incl. newline) can be omitted and will be ignored.

Examples (assuming bash; note the double-quotes " and backticks `):

  • -e CERT="`cat server.crt`" -e KEY="`cat server.key`"
  • -e CERT="MIIDp..b9xA=" -e KEY="MIIEv..x/A=="
  • --env-file /path/to/envlist

env-file template can be generated by:

docker run --rm siomiz/softethervpn gencert > /path/to/envlist

The output will have CERT and KEY already filled in. Modify PSK/USERS.

Certificate volumes support (like -v or --volumes-from) will be added at some point...


MIT License.

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