The Linux Cipe+Masquerading mini-HOWTO: マシン共通の設定

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## 5. マシン共通の設定

## 5.1 /etc/cipe/ip-up

### カーネル 2.0, ipfwadm, cipe 1.0.x の場合

> `

>     #!/bin/bash
>     # ip-up <interface> <myaddr> <daemon-pid> <local> <remote> <arg>
>     #3/29/1999
>     #An example ip-up script for the older 1.x 2.x kernels using ipfwadm that
>     #will setup routes and firewall rules to connect your local class c network
>     #to a remote class c network.

>     #The rules are configured to prevent spoofing and stuffed routing between
>     #the networks.  There are also additional security enhancements commented
>     #out towards the bottom of the script.
>     #Send questions or comments to acj@home.com.

>     #--------------------------------------------------------------------------
>     #Set some script variables
>     device=$1               # the CIPE interface
>     me=$2                   # our UDP address
>     pid=$3                  # the daemon's process ID
>     ipaddr=$4               # IP address of our CIPE device
>     vptpaddr=$5              # IP address of the remote CIPE device
>     option=$6               # argument supplied via options

>     PATH="/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin"

>     #comment/uncomment to enable/disbale kernel logging for all unauthorized
>     #access attempts. Must be same as ip-down script in order to remove rules.
>     log="-o"

>     #--------------------------------------------------------------------------
>     umask 022

>     # just a logging example
>     #echo "UP   $*" >> /var/adm/cipe.log

>     # many systems like these pid files
>     #echo $3 > /var/run/$device.pid

>     #--------------------------------------------------------------------------

>     #add route entry for remote cipe network
>     network=`expr $ptpaddr : '\([0-9]*\.[0-9]*\.[0-9]*\.\)'`0
>     route add -net $network netmask 255.255.255.0 dev $device

>     #need to add route entry for host in 2.0 kernels
>     route add -host $ptpaddr dev $device

>     #--------------------------------------------------------------------------
>     #cipe interface incoming firewall rules
>     #must be inserted into list in reverse order

>     #deny all other incoming packets to cipe interface
>     ipfwadm -I -i deny -W $device -S 0/0 -D 0/0 $log

>     #accept incoming packets from remotenet to localnet on cipe interface
>     ipfwadm -I -i accept -W $device -S $ptpaddr/24 -D $ipaddr/24

>     #accept incoming packets from localnet to remotenet on cipe interface
>     ipfwadm -I -i accept -W $device -S $ipaddr/24 -D $ptpaddr/24

>     #deny incoming packets, cipe interface, claiming to be from localnet; log
>     ipfwadm -I -i deny -W $device -S $ipaddr/24 -D $ipaddr/24 $log

>     #--------------------------------------------------------------------------
>     #cipe interface outgoing firewall rules
>     #must be inserted into list in reverse order

>     #deny all other outgoing packets from cipe interface
>     ipfwadm -O -i deny -W $device -S 0/0 -D 0/0 $log

>     #accept outgoing from remotenet to localnet on cipe interface
>     ipfwadm -O -i accept -W $device -S $ptpaddr/24 -D $ipaddr/24

>     #accept outgoing from localnet to remotenet on cipe interface
>     ipfwadm -O -i accept -W $device -S $ipaddr/24 -D $ptpaddr/24

>     #deny outgoing to localnet from localnet, cipe interface, deny; log
>     ipfwadm -O -i deny -W $device -S $ipaddr/24 -D $ipaddr/24 $log

>     #--------------------------------------------------------------------------
>     #The forwarding is configured so machines on your local network do not get
>     #masqueraded to the remote network.  This provides better access control
>     #between networks.  Must be inserted into list in reverse order

>     #deny all other forwarding through cipe interface; log
>     ipfwadm -F -i deny -W $device -S 0/0 -D 0/0 $log

>     #accept forwarding from remotenet to localnet on cipe interfaces
>     ipfwadm -F -i accept -W $device -S $ptpaddr/24 -D $ipaddr/24

>     #accept forwarding from localnet to remotenet on cipe interfaces
>     ipfwadm -F -i accept -W $device -S $ipaddr/24 -D $ptpaddr/24

>     #--------------------------------------------------------------------------
>     #Make sure forwarding is enabled in the kernel. The kernel by default may
>     #have forwarding disabled.
>     /bin/echo 1 > /proc/sys/net/ipv4/ip_forward

>     #--------------------------------------------------------------------------
>     #Optional security enhancement - set default forward policy to
>     #DENY or REJECT.  If your forwarding default policy is DENY/REJECT
>     #you will need to add the following rules to your main forward chain.  It
>     #is a good idea to have all default policies set for DENY or
>     #REJECT.

>     #define machine interfaces
>     #localif="eth0"
>     #staticif="eth1"                ;cable modem users
>     #staticif="ppp0"                ;dialup users

>     #a real sloppy way to get the peer ip address from the options file - a new
>     #argument with peer ip:port passed to script would be nice.
>     #both lines need to be uncommented
>     #peerfile=`grep $device /etc/cipe/options.* | cut -f1 -d:`
>     #peer=`grep peer $peerfile | cut -f1 -d: | awk '{print $2}'`

>     #must log peer ip address for ip-down script
>     #echo $peer > /var/run/$device.peerip

>     #accept forwarding from localnet to remotenet on internal network interface
>     #ipfwadm -F -i accept -W $localif -S $ipaddr/24 -D $ptpaddr/24
>     #accept forwarding from remotenet to localnet on internal network interface
>     #ipfwadm -F -i accept -W $localif -S $ptpaddr/24 -D $ipaddr/24
>     #accept forwarding on staticif from me to peer
>     #myaddr=`echo $me | cut -f1 -d:`
>     #ipfwadm -F -i accept -W $staticif -S $myaddr -D $peer
>     #--------------------------------------------------------------------------
>     #Other optional security enhancement
>     #block all incoming requests from everywhere to our cipe udp port
>     #except our peer's udp port

>     #need to determine udp ports for the cipe interfaces
>     #get our udp port
>     #if [ "$option" = "" ]; then
>     #       myport=`echo $me | cut -f2 -d:`
>     #else
>     #       myport=$option
>     #fi

>     #get remote udp port -- peerfile variable must be set above
>     #peerport=`grep peer $peerfile | cut -f2 -d:`

>     #must log peer udp port for ip-down script
>     #echo $peerport > /var/run/$device.peerport

>     #get our ip address
>     #myaddr=`echo $me | cut -f1 -d:`

>     #deny and log all requests to cipe udp port must be inserted first
>     #ipfwadm -I -i deny -P udp -W $staticif -S 0/0 -D $myaddr $myport $log
>     #accept udp packets from peer at udp cipe port to my udp cipe port
>     #ipfwadm -I -i accept -P udp -W $staticif -S $peer $peerport \
>     #-D $myaddr $myport

>     exit 0

> `

### カーネル 2.1/2.2, ipchains, cipe 1.2.x の場合

> `

>     #!/bin/bash
>     # ip-up <interface> <myaddr> <daemon-pid> <local> <remote> <arg>
>     #3/29/1999
>     #An example ip-up script for the newer 2.1/2.2 kernels using ipchains that
>     #will setup routes and firewall rules to connect your local class c network
>     #to a remote class c network.  This script creates 3 user defined chains
>     #-input, output, and forward - for each cipe interface, based on the
>     #interface name. It will then insert a rule into each of the built-in
>     #input, output, and forward chains to use the user defined chains. The
>     #rules are configured to prevent spoofing and stuffed routing between the
>     #networks. There are also additional security enhancements commented out
>     #towards the bottom of the script.
>     #Send questions or comments to acj@home.com.

>     #--------------------------------------------------------------------------

>     #Set some script variables
>     device=$1               # the CIPE interface
>     me=$2                   # our UDP address
>     pid=$3                  # the daemon's process ID
>     ipaddr=$4               # IP address of our CIPE device
>     ptpaddr=$5              # IP address of the remote CIPE device
>     option=$6               # argument supplied via options

>     PATH="/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin"

>     #comment/uncomment to enable/disbale kernel logging for all unauthorized
>     #access attempts. Must be same as ip-down script in order to remove rules.
>     log="-l"

>     #--------------------------------------------------------------------------
>     umask 022
>     # just a logging example
>     #echo "UP   $*" >> /var/adm/cipe.log

>     # many systems like these pid files
>     #echo $3 > /var/run/$device.pid

>     #--------------------------------------------------------------------------
>     #add route entry for remote cipe network
>     network=`expr $ptpaddr : '\([0-9]*\.[0-9]*\.[0-9]*\.\)'`0
>     route add -net $network netmask 255.255.255.0 dev $device

>     #--------------------------------------------------------------------------
>     #create new ipchain for cipe interface input rules
>     ipchains -N $device"i"
>     #flush all rules in chain (sanity flush)
>     ipchains -F $device"i"
>     #deny incoming packets, cipe interface, claiming to be from localnet; log
>     ipchains -A $device"i" -j DENY -i $device -s $ipaddr/24 -d $ipaddr/24 $log
>     #accept incoming packets from localnet to remotenet on cipe interface
>     ipchains -A $device"i" -j ACCEPT -i $device -s $ipaddr/24 -d $ptpaddr/24
>     #accept incoming packets from remotenet to localnet on cipe interface
>     ipchains -A $device"i" -j ACCEPT -i $device -s $ptpaddr/24 -d $ipaddr/24
>     #deny all other incoming packets
>     ipchains -A $device"i" -j DENY -s 0/0 -d 0/0 $log

>     #--------------------------------------------------------------------------
>     #create new ipchain for cipe interface output rules
>     ipchains -N $device"o"
>     #flush all rules in chain (sanity flush)
>     ipchains -F $device"o"
>     #deny outgoing to localnet from localnet, cipe interface, deny; log
>     ipchains -A $device"o" -j DENY -i $device -s $ipaddr/24 -d $ipaddr/24 $log
>     #accept outgoing from localnet to remotenet on cipe interface
>     ipchains -A $device"o" -j ACCEPT -i $device -s $ipaddr/24 -d $ptpaddr/24
>     #accept outgoing from remotenet to localnet on cipe interface
>     ipchains -A $device"o" -j ACCEPT -i $device -s $ptpaddr/24 -d $ipaddr/24
>     #deny all other outgoing packets
>     ipchains -A $device"o" -j DENY -s 0/0 -d 0/0 $log

>     #--------------------------------------------------------------------------
>     #The forward chain is configured so machines on your local network do not
>     #get masqueraded to the remote network.  This provides better access
>     #control between networks.

>     #create new ipchain for cipe interface forward rules
>     ipchains -N $device"f"
>     #flush all rules in chain (sanity flush)
>     ipchains -F $device"f"
>     #accept forwarding from localnet to remotenet on cipe interfaces
>     ipchains -A $device"f" -j ACCEPT -i $device -s $ipaddr/24 -d $ptpaddr/24
>     #accept forwarding from remotenet to localnet on cipe interfaces
>     ipchains -A $device"f" -j ACCEPT -i $device -s $ptpaddr/24 -d $ipaddr/24
>     #deny all other forwarding; log
>     ipchains -A $device"f" -j DENY -s 0/0 -d 0/0 $log

>     #--------------------------------------------------------------------------
>     #Make sure forwarding is enabled in the kernel. New kernels by default have
>     #forwarding disabled.
>     /bin/echo 1 > /proc/sys/net/ipv4/ip_forward

>     #--------------------------------------------------------------------------
>     #insert rules to main input, output, and forward chains to enable new rules
>     #for the cipe interface
>     ipchains -I input -i $device -j $device"i"
>     ipchains -I output -i $device -j $device"o"
>     ipchains -I forward -i $device -j $device"f"

>     #--------------------------------------------------------------------------
>     #Optional security enhancement - set built-in forward chain policy to
>     #DENY or REJECT.  If your main forward chain default policy is DENY/REJECT
>     #you will need to add the following rules to your main forward chain.  It
>     #is a good idea to have all built-in chain default policies set for DENY or
>     #REJECT.

>     #define machine interfaces
>     #localif="eth0"
>     #staticif="eth1"                ;cable modem users
>     #staticif="ppp0"                ;dialup users

>     #a real sloppy way to get the peer ip address from the options file - a new
>     #argument with peer ip:port passed to script would be nice.
>     #both lines need to be uncommented
>     #peerfile=`grep $device /etc/cipe/options.* | cut -f1 -d:`
>     #peer=`grep peer $peerfile | cut -f1 -d: | awk '{print $2}'`

>     #must log peer ip address for ip-down script
>     #echo $peer > /var/run/$device.peerip

>     #accept forwarding from localnet to remotenet on internal network interface
>     #ipchains -I forward -j ACCEPT -i $localif -s $ipaddr/24 -d $ptpaddr/24
>     #accept forwarding from remotenet to localnet on internal network interface
>     #ipchains -I forward -j ACCEPT -i $localif -s $ptpaddr/24 -d $ipaddr/24
>     #accept forwarding on staticif from me to peer
>     #myaddr=`echo $me | cut -f1 -d:`
>     #ipchains -I forward -j ACCEPT -i $staticif -s $myaddr -d $peer
>     #--------------------------------------------------------------------------
>     #Other optional security enhancement
>     #block all incoming requests from everywhere to our cipe udp port
>     #except our peer's udp port

>     #need to determine udp ports for the cipe interfaces
>     #get our udp port
>     #if [ "$option" = "" ]; then
>     #       myport=`echo $me | cut -f2 -d:`
>     #else
>     #       myport=$option
>     #fi

>     #get remote udp port -- peerfile variable must be set above
>     #peerport=`grep peer $peerfile | cut -f2 -d:`

>     #must log peer udp port for ip-down script
>     #echo $peerport > /var/run/$device.peerport

>     #get our ip address
>     #myaddr=`echo $me | cut -f1 -d:`

>     #deny and log all requests to cipe udp port must be inserted first
>     #ipchains -I input -j DENY -p udp -i $staticif -s 0/0 \
>     #-d $myaddr $myport $log
>     #accept udp packets from peer at udp cipe port to my udp cipe port
>     #ipchains -I input -j ACCEPT -p udp -i $staticif -s $peer $peerport \
>     # -d $myaddr $myport

>     #--------------------------------------------------------------------------
>     # Set up spoofing protection in kernel as an additional security measure
>     #--------------------------------------------------------------------------
>     #Why do I have spoofing protection in the firewall rules in addition to
>     #this script that sets up spoof protection for each interface in the
>     #kernel? Guess I'm paranoid.

>     if [ -e /proc/sys/net/ipv4/conf/all/rp_filter ]; then
>             echo -n "Setting up IP spoofing protection..."
>             iface="/proc/sys/net/ipv4/conf/$device/rp_filter"
>             echo 1 > $iface
>             echo "done."
>     else
>             echo "Cannot setup spoof protection in kernel for $device" \
>                     | mail -s"Security Warning: $device" root
>             exit 1
>     fi

>     exit 0

> `

## 5.2 /etc/cipe/ip-down

### カーネル 2.0, ipfwadm, cipe 1.0.x の場合

> `

>     #!/bin/bash

>     # ip-down <interface> <myaddr> <daemon-pid> <local> <remote> <arg>
>     #3/29/1999
>     #An example ip-down script for the older 1.x 2.x kernels using ipfwadm that
>     #will remove firewall rules that were setup to connect your local class c
>     #network to a remote class c network.

>     #--------------------------------------------------------------------------
>     #Set some script variables
>     device=$1               # the CIPE interface
>     me=$2                   # our UDP address
>     pid=$3                  # the daemon's process ID
>     ipaddr=$4               # IP address of our CIPE device
>     ptpaddr=$5              # IP address of the remote CIPE device
>     option=$6               # argument supplied via options

>     PATH="/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin"

>     #comment/uncomment to enable/disbale kernel logging for all unauthorized
>     #access attempts. Must be same as ip-down script in order to remove rules.
>     log="-o"

>     #--------------------------------------------------------------------------
>     umask 022

>     # just a logging example
>     #echo "DOWN   $*" >> /var/adm/cipe.log

>     # many systems like these pid files
>     #rm -f /var/run/$device.pid

>     #--------------------------------------------------------------------------
>     #cipe interface incoming firewall rules

>     #delete (deny all other incoming packets to cipe interface)
>     ipfwadm -I -d deny -W $device -S 0/0 -D 0/0 $log

>     #delete (accept incoming packets from remotenet to localnet on cipe
>     #interface)
>     ipfwadm -I -d accept -W $device -S $ptpaddr/24 -D $ipaddr/24

>     #delete (accept incoming packets from localnet to remotenet on cipe
>     #interface)
>     ipfwadm -I -d accept -W $device -S $ipaddr/24 -D $ptpaddr/24

>     #delete (deny incoming packets, cipe interface, claiming to be from
>     #localnet and log)
>     ipfwadm -I -d deny -W $device -S $ipaddr/24 -D $ipaddr/24 $log

>     #--------------------------------------------------------------------------
>     #cipe interface incoming firewall rules

>     #delete (deny all other outgoing packets from cipe interface)
>     ipfwadm -O -d deny -W $device -S 0/0 -D 0/0 $log

>     #delete (accept outgoing from remotenet to localnet on cipe interface)
>     ipfwadm -O -d accept -W $device -S $ptpaddr/24 -D $ipaddr/24

>     #delete (accept outgoing from localnet to remotenet on cipe interface)
>     ipfwadm -O -d accept -W $device -S $ipaddr/24 -D $ptpaddr/24

>     #delete (deny outgoing to localnet from localnet, cipe interface, deny
>     #and log)
>     ipfwadm -O -d deny -W $device -S $ipaddr/24 -D $ipaddr/24 $log

>     #--------------------------------------------------------------------------
>     #cipe interface forwarding firewall rules

>     #delete (deny all other forwarding through cipe interface; log)
>     ipfwadm -F -d deny -W $device -S 0/0 -D 0/0 $log

>     #delete (accept forwarding from remotenet to localnet on cipe interfaces)
>     ipfwadm -F -d accept -W $device -S $ptpaddr/24 -D $ipaddr/24

>     #delete (accept forwarding from localnet to remotenet on cipe interfaces)
>     ipfwadm -F -d accept -W $device -S $ipaddr/24 -D $ptpaddr/24

>     #--------------------------------------------------------------------------
>     #Optional security enhancement - set default forward policy to
>     #DENY or REJECT.  If your forwarding default policy is DENY/REJECT
>     #you will need to add the following rules to your main forward chain.  It
>     #is a good idea to have all default policies set for DENY or
>     #REJECT.

>     #define machine interfaces
>     #localif="eth0"
>     #staticif="eth1"                ;cable modem users
>     #staticif="ppp0"                ;dialup users

>     #a real sloppy way to get the peer ip address from the options file - a new
>     #argument with peer ip:port passed to script would be nice.
>     #both lines need to be uncommented
>     #peerfile=`grep $device /etc/cipe/options.* | cut -f1 -d:`
>     #peer=`grep peer $peerfile | cut -f1 -d: | awk '{print $2}'`

>     #must log peer ip address for ip-down script
>     #echo $peer > /var/run/$device.peerip

>     #delete (accept forwarding from localnet to remotenet on internal network
>     interface)
>     #ipfwadm -F -d accept -W $localif -S $ipaddr/24 -D $ptpaddr/24
>     #delete (accept forwarding from remotenet to localnet on internal network
>     interface)
>     #ipfwadm -F -d accept -W $localif -S $ptpaddr/24 -D $ipaddr/24
>     #delete (accept forwarding on staticif from me to peer)
>     #myaddr=`echo $me | cut -f1 -d:`
>     #ipfwadm -F -d accept -W $staticif -S $myaddr -D $peer
>     #--------------------------------------------------------------------------
>     #Other optional security enhancement
>     #block all incoming requests from everywhere to our cipe udp port
>     #except our peer's udp port

>     #need to determine udp ports for the cipe interfaces
>     #get our udp port
>     #if [ "$option" = "" ]; then
>     #       myport=`echo $me | cut -f2 -d:`
>     #else
>     #       myport=$option
>     #fi

>     #get remote udp port -- peerfile variable must be set above
>     #peerport=`grep peer $peerfile | cut -f2 -d:`

>     #must log peer udp port for ip-down script
>     #echo $peerport > /var/run/$device.peerport

>     #get our ip address
>     #myaddr=`echo $me | cut -f1 -d:`

>     #delete (deny and log all requests to cipe udp port must be inserted first)
>     #ipfwadm -I -d deny -P udp -W $staticif -S 0/0 -D $myaddr $myport $log
>     #delete (accept udp packets from peer at udp cipe port to my udp cipe port)
>     #ipfwadm -I -d accept -P udp -W $staticif -S $peer $peerport \
>     #-D $myaddr $myport

>     exit 0

> `

### カーネル 2.1/2.2, ipchains, cipe 1.2.x の場合

> `

>     #!/bin/sh
>     # ip-down <interface> <myaddr> <daemon-pid> <local> <remote> <arg>
>     #3/29/1999
>     #An example ip-down script for the newer 2.1/2.2 kernels using ipchains
>     #that will remove firewall rules that were setup to connect your local
>     #class c network to a remote class c network.  Optional security
>     #enhancement rules removal is also added and commented towards end of
>     #script.
>     #Send questions or comments to acj@home.com.

>     #--------------------------------------------------------------------------
>     #Set some script variables
>     device=$1               # the CIPE interface
>     me=$2                   # our UDP address
>     pid=$3                  # the daemon's process ID
>     ipaddr=$4               # IP address of our CIPE device
>     ptpaddr=$5              # IP address of the remote CIPE device
>     option=$6               # argument supplied via options
>     PATH="/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin"

>     #comment/uncomment to enable/disbale kernel logging for all unauthorized
>     #access attempts
>     #must be same as ip-up script in order to remove rules
>     log="-l"

>     #--------------------------------------------------------------------------
>     umask 022

>     # Logging example
>     #echo "DOWN $*" >> /var/adm/cipe.log

>     # remove the daemon pid file
>     #rm -f /var/run/$device.pid

>     #--------------------------------------------------------------------------
>     #remove rules from main input, output, and forward chains for cipe
>     #interface
>     ipchains -D input -i $device -j $device"i"
>     ipchains -D output -i $device -j $device"o"
>     ipchains -D forward -i $device -j $device"f"

>     #--------------------------------------------------------------------------
>     #flush all rules in cipe interface input chain
>     ipchains -F $device"i"
>     #remove cipe interface input chain
>     ipchains -X $device"i"

>     #--------------------------------------------------------------------------
>     #flush all rules in cipe interface output chain
>     ipchains -F $device"o"
>     #remove cipe interface output chain
>     ipchains -X $device"o"

>     #--------------------------------------------------------------------------
>     #flush all rules in cipe interface forward chain
>     ipchains -F $device"f"
>     #remove cipe interface forward chain
>     ipchains -X $device"f"

>     #--------------------------------------------------------------------------
>     #Remove optional security enhancement rules

>     #get peer ip address
>     #peer=`cat /var/run/$device.peerip`

>     #define machine interfaces
>     #localif="eth0"
>     #staticif="eth1"                ;cable modem users
>     #staticif="ppp0"                ;dialup users

>     #get our ip address
>     #myaddr=`echo $me |cut -f1 -d:`

>     #delete (accept forwarding from localnet to remotenet on internal network
>     #interface)
>     #ipchains -D forward -j ACCEPT -i $localif -s $ipaddr/24 -d $ptpaddr/24
>     #delete (accept forwarding from remotenet to localnet on internal network
>     #interface)
>     #ipchains -D forward -j ACCEPT -i $localif -s $ptpaddr/24 -d $ipaddr/24
>     #delete (accept forwarding on staticif from me to peer)
>     #ipchains -D forward -j ACCEPT -i $staticif -s $myaddr -d $peer

>     #remove peer ip file
>     #rm /var/run/$device.peerip

>     #--------------------------------------------------------------------------
>     #Remove other optional security enhancement rules

>     #get peer udp port
>     #peerport=`cat /var/run/$device.peerport`

>     #get our udp port
>     #if [ "$option" = "" ]; then
>     #        myport=`echo $me | cut -f2 -d:`
>     #else
>     #        myport=$option
>     #fi

>     #delete (deny and log all requests to cipe udp port must be inserted first)
>     #ipchains -D input -j DENY -p udp -i $staticif -s 0/0 \
>     #-d $myaddr $myport $log
>     #delete (accept udp packets from peer at udp cipe port to my udp cipe port)
>     #ipchains -D input -j ACCEPT -p udp -i $staticif -s $peer $peerport \
>     #-d $myaddr $myport

>     #remove peer port file
>     #rm /var/run/$device.peerport

>     #--------------------------------------------------------------------------

>     exit 0

> `

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