Port 8023 is better, it is non protected. Users are free to bind another port

Dockerfile

@@ -12,6 +12,6 @@ FROM alpine:3.12
 RUN apk add --no-cache -X https://dl-cdn.alpinelinux.org/alpine/edge/community/ ffmpeg libsrt
 COPY --from=build_base /code/out/ghostream /app/ghostream
 WORKDIR /app
-# 9710 for SRT, 8080 for Web, 2112 for monitoring and 10000-10005 (UDP) for WebRTC
-EXPOSE 23 9710/udp 8080 2112 10000-10005/udp
+# 9710 for SRT, 8080 for Web, 2112 for monitoring, 10000-10005 (UDP) for WebRTC and 23 for telnet
+EXPOSE 9710/udp 8080 2112 10000-10005/udp 8023
 CMD ["/app/ghostream"]

docs/ghostream.example.yml

@@ -75,7 +75,7 @@ telnet:
   # You must enable it to use it.
   #enable: false
 
-  #listenAddress: :23
+  #listenAddress: :8023
 
   # Size is in characters. It is recommended to keep a 16x9 format.
   #width: 80

internal/config/config.go

@@ -60,7 +60,7 @@ func New() *Config {
 		},
 		Telnet: telnet.Options{
 			Enabled:       false,
-			ListenAddress: ":23",
+			ListenAddress: ":8023",
 			Width:         80,
 			Height:        45,
 			Delay:         50,