장소를 바꿔가며 인터넷을 해야 할 때 어떻게들 설정을 바꾸시나요?

#!/bin/bash
#

##
#
[ "${1}" == "debug" ] && debug="echo"

if_inet=
if_local=
if_air="eth1"
if_hack="eth2"
if_vm="vmnet1"
if_china="tap0C"

timedate=$(date "+%k %u")
hour=${2:-${timedate% *}}
date=${3:-${timedate#* }}

##
#
function init_iface()
{
while /sbin/ip -f inet address delete dev ${iface}
do
:
done
}

function home()
{
${debug} killall udhcpc
${debug} /sbin/ip a a 192.168.0.126/24 dev ${iface}
${debug} /sbin/ip l s ${iface} up
${debug} /sbin/ip l s eth2 up
${debug} /sbin/iptables -t nat -F
}

function arm()
{
${debug} /sbin/udhcpc -i ${iface}
}

function rm_cups()
{
${debug} /etc/init.d/cupsys stop
}

function workHard()
{
${debug} /sbin/ip a a 61.36.128.252/25 dev ${iface}
${debug} /sbin/ip a a 172.31.10.126/16 dev ${iface}
${debug} /sbin/ip a a 192.0.2.92/24 dev ${iface}
${debug} /sbin/ip l s ${iface} up

if [ "${1}" == "" ]; then
${debug} /sbin/ip r r default via 61.36.128.193 dev ${iface}
else
${debug} /sbin/ip r r default via 172.31.0.1 dev ${iface}
fi

${debug} /sbin/iptables -t nat -F
${debug} /sbin/iptables -t nat -I POSTROUTING -o ${iface} -s 10.0.0.0/8 -j SNAT --to 61.36.128.252
${debug} /sbin/iptables -t nat -I POSTROUTING -o ${iface} -d 172.31.0.0/16 -j SNAT --to 172.31.10.126
}

##
#
echo "|${hour}|${date}|"
case "${date}" in
"7")
iface="eth2"
arm
;;

"6")
if [ ${hour} -gt 13 ] ; then
iface="eth2"
arm
else
iface="eth0"
init_iface
workHard
fi
;;

*)
if [ ${hour} -gt 17 ] ; then
iface="eth2"
arm
else
iface="eth0"
init_iface
workHard
fi
;;
esac

rm_cups

放下着-----
내려놓으려는 마음도 내려놓기

IBM Access Connection -_-b
(참고로 Windows 용 Application 입니다)

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