init

Dockerfile

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+# start with Alpine Linux
+FROM alpine:3.6
+MAINTAINER Christian Becker <mail@christianbecker.name>
+
+# system setup with "openssh-client"
+RUN apk add --no-cache \
+        openssh-client \
+    && echo "! installation is finished !"
+
+# run openssh-client
+ENTRYPOINT ["/usr/bin/ssh", "-oCiphers=+3des-cbc", "-oHostKeyAlgorithms=+ssh-dss", "-oKexAlgorithms=+diffie-hellman-group1-sha1", "-oUserKnownHostsFile=/dev/null", "-oStrictHostKeyChecking=no", "-oLogLevel=quiet"]

LICENSE

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+MIT License
+
+Copyright (c) 2019 Christian Becker
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# ssh-legacy
+Run an old ssh client with legacy options on Alpine Linux with Docker.   
+
+You can use this client if you need to connect to a very old device that only supports legacy algorithms. Since some of the older algorithms have been found to be weak, newer versions of ssh clients leave them disabled.  
+WARNING! Please upgrade the old device if possible to a secure alternative! Only if you have no other option, use this client.  
+
+---
+
+## how to use it
+If you just want to use the container from docker hub - proceed with step 3.  
+
+### 1.) OPTIONAL: BUILD the docker container
+```
+docker build -t christianbecker/ssh-legacy .
+```
+
+---
+
+### 2.) OPTIONAL: RUN the container - just to try if it works
+```
+docker run --rm -it christianbecker/ssh-legacy USER@HOST
+```
+(should connect to your old device "HOST" as user "USER")  
+
+
+---
+
+### 3.) USE the container
+To use the container like a built in command in your system you can add the following alias to `.bash_aliases` or `.bashrc`:  
+```
+alias ssh-legacy='docker run --rm -it christianbecker/ssh-legacy'
+```
+
+Then simply use `ssh-legacy` (like "ssh") followed with options of your choice in bash console on docker host system.  
+
+
+---
+
+## project links
+[GitHub](https://github.com/christian-becker/ssh-legacy)  
+[Docker Hub](https://hub.docker.com/r/christianbecker/ssh-legacy/)  
+
+
+---
+
+## Authors
+* **Christian Becker** - [christian-becker](https://github.com/christian-becker)  
+
+## License
+This project is licensed under the MIT License - see the [LICENSE](https://github.com/christian-becker/ssh-legacy/blob/master/LICENSE) file for details.  
+