Diskussion:Ssh knock: Unterschied zwischen den Versionen
Aus UUGRN
(Simple knock.) |
(pre/pre) |
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What do you think of this script? (A thousand apologies, not a German-speaker.) | What do you think of this script? (A thousand apologies, not a German-speaker.) | ||
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#!/bin/sh | #!/bin/sh | ||
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echo '/*/' | echo '/*/' | ||
</pre> |
Aktuelle Version vom 15. Mai 2014, 18:38 Uhr
What do you think of this script? (A thousand apologies, not a German-speaker.)
#!/bin/sh dir=/var/knockdata num=${0##*[.]} function badknock { echo b > "$dir/$1"; } # hosts banned until lockfile removed function ifnoknock { if [[ ! -f "$dir/$1" ]]; then badknock $REMOTE_HOST; fi } case "$num" in 1) if [[ -f "$dir/$REMOTE_HOST" ]] #reknock? then if [[ "$(<$dir/$REMOTE_HOST)" = 'g' ]] then echo 1 > "$dir/$REMOTE_HOST" #reknock! else badknock "$REMOTE_HOST" fi else echo 1 > "$dir/$REMOTE_HOST" fi ;; 2) ifnoknock "$REMOTE_HOST" if [[ "$(<$dir/$REMOTE_HOST)" = '1' ]] then echo 2 > "$dir/$REMOTE_HOST" else badknock "$REMOTE_HOST" fi ;; 3) ifnoknock "$REMOTE_HOST" if [[ "$(<$dir/$REMOTE_HOST)" = '2' ]] then echo g > "$dir/$REMOTE_HOST" else badknock "$REMOTE_HOST" fi ;; t) ifnoknock "$REMOTE_HOST" if [[ "$(<$dir/$REMOTE_HOST)" = 'g' ]] then exec /usr/sbin/sshd -i # (https://wiki.uugrn.org/Ssh_knock) fi ;; esac echo '/*/'