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4d42845853
According to ipsec.conf manual: pfs whether Perfect Forward Secrecy of keys is desired on the connection's keying channel (with PFS, penetration of the key-exchange protocol does not compromise keys negotiated earlier); Since there is no reason to ever refuse PFS, Openswan will allow a connection defined with pfs=no to use PFS anyway. Acceptable values are yes (the default) and no. Found removing the option would make it impossible to work with no PFS setting router. It may related to CS-15511.
269 lines
7.2 KiB
Bash
Executable File
269 lines
7.2 KiB
Bash
Executable File
# Copyright 2012 Citrix Systems, Inc. Licensed under the
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# Apache License, Version 2.0 (the "License"); you may not use this
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# file except in compliance with the License. Citrix Systems, Inc.
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# reserves all rights not expressly granted by the License.
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# You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#!/usr/bin/env bash
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source /root/func.sh
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lock="biglock"
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locked=$(getLockFile $lock)
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if [ "$locked" != "1" ]
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then
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exit 1
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fi
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vpnconfdir="/etc/ipsec.d"
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vpnoutmark="0x525"
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usage() {
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printf "Usage: %s: (-A|-D) -l <left-side vpn peer> -n <left-side guest cidr> -g <left-side gateway> -r <right-side vpn peer> -N <right-side private subnets> -e <esp policy> -i <ike policy> -t <lifetime> -s <pre-shared secret> \n" $(basename $0) >&2
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}
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#set -x
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start_ipsec() {
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service ipsec status > /dev/null
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if [ $? -ne 0 ]
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then
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service ipsec start > /dev/null
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#Wait until ipsec started, 5 seconds at most
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for i in {1..5}
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do
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logger -t cloud "$(basename $0): waiting ipsec start..."
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service ipsec status > /dev/null
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result=$?
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if [ $result -eq 0 ]
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then
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break
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fi
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sleep 1
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done
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fi
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service ipsec status > /dev/null
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return $?
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}
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enable_iptables_subnets() {
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for net in $rightnets
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do
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sudo iptables -A FORWARD -t mangle -s $leftnet -d $net -j MARK --set-mark $vpnoutmark
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sudo iptables -A OUTPUT -t mangle -s $leftnet -d $net -j MARK --set-mark $vpnoutmark
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done
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return 0
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}
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check_and_enable_iptables() {
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sudo iptables-save | grep "A INPUT -i $outIf -p udp -m udp --dport 500 -j ACCEPT"
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if [ $? -ne 0 ]
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then
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sudo iptables -A INPUT -i $outIf -p udp -m udp --dport 500 -j ACCEPT
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# Prevent NAT on "marked" VPN traffic, so need to be the first one on POSTROUTING chain
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sudo iptables -t nat -I POSTROUTING -t nat -o $outIf -m mark --mark $vpnoutmark -j ACCEPT
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fi
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return 0
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}
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disable_iptables_subnets() {
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for net in $rightnets
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do
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sudo iptables -D FORWARD -t mangle -s $leftnet -d $net -j MARK --set-mark $vpnoutmark
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sudo iptables -D OUTPUT -t mangle -s $leftnet -d $net -j MARK --set-mark $vpnoutmark
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done
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return 0
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}
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check_and_disable_iptables() {
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find $vpnconfdir -name "ipsec.vpn*.conf" | grep ipsec
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if [ $? -ne 0 ]
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then
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#Nobody else use s2s vpn now, so delete the iptables rules
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sudo iptables -D INPUT -i $outIf -p udp -m udp --dport 500 -j ACCEPT
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sudo iptables -t nat -D POSTROUTING -t nat -o $outIf -m mark --mark $vpnoutmark -j ACCEPT
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fi
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return 0
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}
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ipsec_tunnel_del() {
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disable_iptables_subnets
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sudo ipsec auto --down vpn-$rightpeer
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sudo ipsec auto --delete vpn-$rightpeer
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outIp=$leftpeer
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local vpnconffile=$vpnconfdir/ipsec.vpn-$rightpeer.conf
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local vpnsecretsfile=$vpnconfdir/ipsec.vpn-$rightpeer.secrets
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logger -t cloud "$(basename $0): removing configuration for ipsec tunnel to $rightpeer"
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sudo rm -f $vpnconffile
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sudo rm -f $vpnsecretsfile
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sudo ipsec auto --rereadall
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check_and_disable_iptables
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return 0
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}
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ipsec_tunnel_add() {
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#need to unify with remote access VPN
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start_ipsec
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if [ $? -ne 0 ]
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then
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logger -t cloud "$(basename $0): Failed to start ipsec service!"
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return 1
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fi
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outIp=$leftpeer
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sudo mkdir -p $vpnconfdir
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local vpnconffile=$vpnconfdir/ipsec.vpn-$rightpeer.conf
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local vpnsecretsfile=$vpnconfdir/ipsec.vpn-$rightpeer.secrets
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logger -t cloud "$(basename $0): creating configuration for ipsec tunnel: left peer=$leftpeer \
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left net=$leftnet left gateway=$leftgw right peer=$rightpeer right network=$rightnets phase1 policy=$ikepolicy \
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phase2 policy=$esppolicy lifetime=$time secret=$secret"
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[ "$op" == "-A" ] && ipsec_tunnel_del
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check_and_enable_iptables
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sudo echo "conn vpn-$rightpeer" > $vpnconffile &&
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sudo echo " left=$leftpeer" >> $vpnconffile &&
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sudo echo " leftsubnet=$leftnet" >> $vpnconffile &&
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sudo echo " leftnexthop=$leftgw" >> $vpnconffile &&
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sudo echo " right=$rightpeer" >> $vpnconffile &&
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sudo echo " rightsubnets={$rightnets}" >> $vpnconffile &&
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sudo echo " type=tunnel" >> $vpnconffile &&
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sudo echo " authby=secret" >> $vpnconffile &&
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sudo echo " keyexchange=ike" >> $vpnconffile &&
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sudo echo " pfs=no" >> $vpnconffile &&
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sudo echo " esp=$esppolicy" >> $vpnconffile &&
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sudo echo " salifetime=${time}s" >> $vpnconffile &&
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sudo echo " ike=$ikepolicy" >> $vpnconffile &&
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sudo echo " ikelifetime=${time}s" >> $vpnconffile &&
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sudo echo " keyingtries=3" >> $vpnconffile &&
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sudo echo " dpddelay=30" >> $vpnconffile &&
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sudo echo " dpdtimeout=120" >> $vpnconffile &&
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sudo echo " dpdaction=restart" >> $vpnconffile &&
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sudo echo " auto=add" >> $vpnconffile &&
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sudo echo "$leftpeer $rightpeer: PSK \"$secret\"" > $vpnsecretsfile &&
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sudo chmod 0400 $vpnsecretsfile
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enable_iptables_subnets
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sudo ipsec auto --rereadall
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sudo ipsec auto --add vpn-$rightpeer
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sudo ipsec auto --up vpn-$rightpeer
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logger -t cloud "$(basename $0): done ipsec tunnel entry for right peer=$rightpeer right networks=$rightnets"
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#20 seconds for checking if it's ready
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for i in {1..4}
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do
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logger -t cloud "$(basename $0): checking connection status..."
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/opt/cloud/bin/checks2svpn.sh $rightpeer
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result=$?
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if [ $result -eq 0 ]
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then
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break
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fi
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sleep 5
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done
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if [ $result -eq 0 ]
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then
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logger -t cloud "$(basename $0): connect to remote successful"
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else
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logger -t cloud "$(basename $0): fail to connect to remote, status code: $result"
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logger -t cloud "$(basename $0): would stop site-to-site VPN connection"
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ipsec_tunnel_del
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fi
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return $result
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}
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rflag=
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pflag=
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eflag=
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Eflag=
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lflag=
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iflag=
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Iflag=
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sflag=
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op=""
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while getopts 'ADl:n:g:r:N:e:i:t:s:' OPTION
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do
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case $OPTION in
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A) opflag=1
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op="-A"
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;;
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D) opflag=2
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op="-D"
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;;
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l) lflag=1
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leftpeer="$OPTARG"
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;;
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n) nflag=1
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leftnet="$OPTARG"
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;;
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g) gflag=1
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leftgw="$OPTARG"
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;;
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r) rflag=1
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rightpeer="$OPTARG"
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;;
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N) Nflag=1
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rightnets="$OPTARG"
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;;
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e) eflag=1
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esppolicy="$OPTARG"
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;;
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i) iflag=1
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ikepolicy="$OPTARG"
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;;
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t) tflag=1
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time="$OPTARG"
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;;
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s) sflag=1
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secret="$OPTARG"
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;;
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?) usage
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unlock_exit 2 $lock $locked
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;;
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esac
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done
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logger -t cloud "$(basename $0): parameters $*"
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# get interface for public ip
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ip link|grep BROADCAST|grep -v eth0|cut -d ":" -f 2 > /tmp/iflist
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while read i
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do
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ip addr show $i|grep "$leftpeer"
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if [ $? -eq 0 ]
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then
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outIf=$i
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break
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fi
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done < /tmp/iflist
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rightnets=${rightnets//,/ }
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ret=0
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#Firewall ports for one-to-one/static NAT
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if [ "$opflag" == "1" ]
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then
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ipsec_tunnel_add
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ret=$?
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elif [ "$opflag" == "2" ]
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then
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ipsec_tunnel_del
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ret=$?
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else
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printf "Invalid action specified, must choose -A or -D to add/del tunnels\n" >&2
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unlock_exit 5 $lock $locked
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fi
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unlock_exit $ret $lock $locked
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