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arrel/Throttling

Created July 29, 2010 20:38
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  1. arrel created this gist Jul 29, 2010.
    75 changes: 75 additions & 0 deletions Throttling
    View file
    Original file line number Diff line number Diff line change
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    #!/bin/bash
    # if you do not have access to run the script, run "chmod 755 throttling"
    # to run enter in terminal "./throttling [speed]"
    # full (no throttling)
    # fast (300Kbit)
    # medium (100Kbit)
    # slow (10Kbit)
    # wwdc (1Kbit)
    # off (blocks connection)

    # configuration
    host1="yourdomain.com"
    host2="localhost:3000"

    # usage
    if [ "$*" == "" ]; then
    echo "usage: $0 [full|fast|medium|slow|wwdc|off]"
    exit
    fi

    # remove any previous firewall rules
    sudo ipfw list 100 > /dev/null 2>&1
    if [ $? -eq 0 ]; then
    sudo ipfw delete 100 > /dev/null 2>&1
    fi
    sudo ipfw list 110 > /dev/null 2>&1
    if [ $? -eq 0 ]; then
    sudo ipfw delete 110 > /dev/null 2>&1
    fi
    sudo ipfw list 200 > /dev/null 2>&1
    if [ $? -eq 0 ]; then
    sudo ipfw delete 200 > /dev/null 2>&1
    fi
    sudo ipfw list 210 > /dev/null 2>&1
    if [ $? -eq 0 ]; then
    sudo ipfw delete 210 > /dev/null 2>&1
    fi

    # process the command line option
    if [ "$1" == "full" ]; then
    echo "full speed"
    elif [ "$1" == "off" ]; then
    # add rules to deny any connections to configured host
    if [ -n "$host1" ]; then
    sudo ipfw add 100 deny tcp from $host1 to me
    sudo ipfw add 110 deny tcp from me to $host1
    fi
    if [ -n "$host2" ]; then
    sudo ipfw add 200 deny tcp from $host2 to me
    sudo ipfw add 210 deny tcp from me to $host2
    fi
    else
    # create a pipe with limited bandwidth
    bandwidth="100Kbit"
    if [ "$1" == "fast" ]; then
    bandwidth="300Kbit"
    elif [ "$1" == "slow" ]; then
    bandwidth="10Kbit"
    elif [ "$1" == "wwdc" ]; then
    bandwidth="1Kbit"
    fi
    sudo ipfw pipe 1 config bw $bandwidth

    # add rules to use bandwidth limited pipe
    if [ -n "$host1" ]; then
    sudo ipfw add 100 pipe 1 tcp from $host1 to me
    sudo ipfw add 110 pipe 1 tcp from me to $host1
    fi
    if [ -n "$host2" ]; then
    sudo ipfw add 200 pipe 1 tcp from $host2 to me
    sudo ipfw add 210 pipe 1 tcp from me to $host2
    fi
    fi

    sudo ipfw list