to build and run a simple tcp server just use ncat. https://nmap.org/ncat/
for echo server run
ncat -v -e /bin/cat -k -l 11211
to connect it to the bash and have it run as telnet server run
ncat -v -e /bin/bash -k -l 11212
if you do not want to install ncat use the dockerized versions in docker hub https://hub.docker.com/ or build your own
docker pull hellbruh/simple-tcpserver
docker run -it -p 11211:11211 hellbruh/simple-tcpserver
you can kill and stop via Ctrl-P Ctrl-Q and docker stop (see below)
build you own image with Dockerfile here provided for the echo server (change directory to folder docker)
docker build -t simple-tcpserver .
docker run -it -p 11211:11211 simple-tcpserver
see the following output:
hellbruh@PEP:/tmp/docker/simple-tcpserver/docker$ docker build -t simple-tcpserver .
[+] Building 7.4s (6/6) FINISHED
=> [internal] load build definition from Dockerfile 0.3s
=> => transferring dockerfile: 181B 0.1s
=> [internal] load .dockerignore 0.2s
=> => transferring context: 2B 0.0s
=> [internal] load metadata for docker.io/library/alpine:latest 2.8s
=> [1/2] FROM docker.io/library/alpine:latest@sha256:686d8c9dfa6f3ccfc8230bc3178d23f84eeaf7e457f36f271ab1acc5301 1.5s
=> => resolve docker.io/library/alpine:latest@sha256:686d8c9dfa6f3ccfc8230bc3178d23f84eeaf7e457f36f271ab1acc5301 0.1s
=> => sha256:4ff3ca91275773af45cb4b0834e12b7eb47d1c18f770a0b151381cd227f4c253 528B / 528B 0.0s
=> => sha256:e66264b98777e12192600bf9b4d663655c98a090072e1bab49e233d7531d1294 1.47kB / 1.47kB 0.0s
=> => sha256:2408cc74d12b6cd092bb8b516ba7d5e290f485d3eb9672efc00f0583730179e8 2.80MB / 2.80MB 0.8s
=> => sha256:686d8c9dfa6f3ccfc8230bc3178d23f84eeaf7e457f36f271ab1acc53015037c 1.64kB / 1.64kB 0.0s
=> => extracting sha256:2408cc74d12b6cd092bb8b516ba7d5e290f485d3eb9672efc00f0583730179e8 0.4s
=> [2/2] RUN apk add --no-cache --update nmap-ncat 2.4s
=> exporting to image 0.1s
=> => exporting layers 0.1s
=> => writing image sha256:61b788982302a4f81bb71e7e5ad75b1efa3cd019603d8c333aa0ac86f7c0fed9 0.0s
=> => naming to docker.io/library/simple-tcpserver 0.0s
Use 'docker scan' to run Snyk tests against images to find vulnerabilities and learn how to fix them
hellbruh@PEP:/tmp/docker/simple-tcpserver/docker$ docker run -p 11211:11211 simple-tcpserver
Ncat: Version 7.92 ( https://nmap.org/ncat )
Ncat: Listening on :::11211
Ncat: Listening on 0.0.0.0:11211
Ncat: Connection from 172.17.0.1.
Ncat: Connection from 172.17.0.1:59364.
to detach from the server press Ctrl-P Ctrl-Q and stop server with
docker stop <container id>
docker ps -a
will show all container images
You can overwrite command with the following syntax
docker run -it -p 11211:11211/udp simple-tcpserver ncat -v -e /bin/bash -k -l 11212