web3270

A web based front end for c3270. Uses Xterm.js and terminado.

How to Use

First install c3270 (on Debian based systems you can install with sudo apt install c3270)
Install the required packages: pip install -r requirements.txt
Edit the config file web3270.ini customized to your system (see below)
Place your certifcate crt/key file in this folder (or any folder see arguments below)
Start the server: python3 server.py

Config File

The config file allows you to specify multiple options:

server_ip IP address of the tnN3270 server to connect to
server_port TCP port of the tn3270 server to connect to
webport TCP port for this webserver
tls yes/no should this server use HTTPS. If yes this script will check in the folder denoted by the script argument --certs, the default is the folder used the run the script.
encrypted yes/no when connecting to tn3270 use SSL or not
selfsignedcert yes/no allow self signed certs when connecting to encrypted tn3270 server
model tn3270 model type (2 through 5), default 4. See https://x3270.miraheze.org/wiki/3270_models for more details.
useproxy yes/no should a proxy be used to connect to tn3270 server
proxystring The proxy connection string optional.
password If set a login page will be displayed and the password set here will be required to load web3270 optional
secret The secret used to generate secure tokens. If not set the script will set a random one for you optional

Script Arguments

--config the folder where web3270.ini resides. If this file does not exist in the folder provided a default config will be created.
--certs the folder where the web server TLS certificates reside. Files required are ca.csr and ca.key, use the commad below to generate self signed certs:

openssl req -x509 -nodes -days 365 \
    -subj  "/C=CA/ST=QC/O=web3270 Inc/CN=3270.web" \
    -newkey rsa:2048 -keyout ca.key \
    -out ca.csr

Docker

To build a docker container use: docker build --tag "mainframed767/web3270:latest" .

To run the container:

docker run -d \
  --name=web3270 \
  -p 4443:443 \
  -v /opt/docker/web3270:/config \
  -v /opt/docker/web3270/certs:/certs \
  --restart unless-stopped \
  mainframed767/web3270

This command will run web3270 on port 4443.

After the first run the config file web3270.ini will be placed in /opt/docker/web3270. Edit that file to fit your environment then restart the container.

Known Bugs

Changing the font only shows the current row. Resizing the browser window fixes this.

MVS-sysgen / web3270