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September 21, 2017 03:15
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Connect to an arbitrary TCP port to Read/Write. Very basic, will probably break easily but robust enough to test FTP credentials sans FTP
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| #!/bin/bash | |
| if [ ! -z $2 ]; then | |
| host=$1 | |
| port=$2 | |
| exec 5<>/dev/tcp/$host/$port | |
| cat <&5 & | |
| trap "exec 5>&- " EXIT | |
| while true; do | |
| read p | |
| echo "$p" >&5 | |
| done | |
| else | |
| echo "not enough args" | |
| fi |
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this is better
exec 5<>/dev/tcp/$host/$port; cat <&5 & cat >&5; exec 5>&-