├── blocked_prefixes.txt ├── filter_down.sh ├── occupant-telnet-proxy-filter.sh ├── inner-pipe.sh ├── filter_up.sh └── README.md /blocked_prefixes.txt: -------------------------------------------------------------------------------- 1 | \W(R[A-Z]?|U[A-I0]|E[UVW])[0-9] 2 | -------------------------------------------------------------------------------- /filter_down.sh: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | 3 | grep -Ev -f blocked_prefixes.txt 4 | -------------------------------------------------------------------------------- /occupant-telnet-proxy-filter.sh: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | set -eu 3 | socat -dd TCP-LISTEN:7300,reuseaddr,fork SYSTEM:'./inner-pipe.sh' 4 | 5 | -------------------------------------------------------------------------------- /inner-pipe.sh: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | set -eu 3 | stdbuf -i0 -o0 -e0 ./filter_up.sh \ 4 | | socat -dd - TCP:127.0.0.1:7301,keepalive \ 5 | | stdbuf -i0 -o0 -e0 ./filter_down.sh 6 | 7 | -------------------------------------------------------------------------------- /filter_up.sh: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env bash 2 | perl -CS -pe ' 3 | binmode(STDIN); binmode(STDOUT); 4 | # DO NOT touch 0xFF IAC sequence: protection – replace only printable blocks 5 | s/forbidden/XXXX/g; 6 | $_ = "" if /totally_block_this/; 7 | ' 8 | 9 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Telnet proxy filter 2 | 3 | **MITM Telnet proxy to filter occupants in a DX cluster** 4 | 5 | ## How to use on linux 6 | - Start the cw skimmer server in wine, for example: `wine /home/dan/.wine/drive_c/Program\ Files/Afreet/SkimSrv/SkimSrv.exe` 7 | - Change the port in skimmer server to **7301** 8 | - Copy the files from github into one directory `git clone git@github.com:ok1hra/Telnet-proxy-filter.git` 9 | - Set the permissions with the command `cd Telnet-proxy-filter && chmod 766 *.sh` 10 | - Install socat if not present, for example by command `sudo apt install socat` 11 | - Run proxy in terminal `./occupant-telnet-proxy-filter.sh` 12 | - Run `wine Aggregator_v6.4.exe` and setup. 13 |
14 | 15 | --- 16 | 17 |

18 | 19 | ![occupants](https://upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Franti%C5%A1ek_Dost%C3%A1l_Srpen_1968_4_%28cropped%29.jpg/330px-Franti%C5%A1ek_Dost%C3%A1l_Srpen_1968_4_%28cropped%29.jpg) 20 |
*This project was published symbolically on Day of Memory (August 21, 1968) – marking [the invasion and occupation that ended the Prague Spring,](https://en.wikipedia.org/wiki/Warsaw_Pact_invasion_of_Czechoslovakia) a pivotal moment in Czechoslovak history.* 21 | --------------------------------------------------------------------------------