/
l2tp.sh
810 lines (719 loc) · 25 KB
/
l2tp.sh
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
#!/usr/bin/env bash
PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
export PATH
#=======================================================================#
# System Supported: CentOS 6+ / Debian 7+ / Ubuntu 12+ #
# Description: L2TP VPN Auto Installer #
# Author: Teddysun <i@teddysun.com> #
# Intro: https://teddysun.com/448.html #
#=======================================================================#
cur_dir=`pwd`
libreswan_filename="libreswan-3.27"
download_root_url="https://dl.lamp.sh/files"
rootness(){
if [[ $EUID -ne 0 ]]; then
echo "Error:This script must be run as root!" 1>&2
exit 1
fi
}
tunavailable(){
if [[ ! -e /dev/net/tun ]]; then
echo "Error:TUN/TAP is not available!" 1>&2
exit 1
fi
}
disable_selinux(){
if [ -s /etc/selinux/config ] && grep 'SELINUX=enforcing' /etc/selinux/config; then
sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config
setenforce 0
fi
}
get_opsy(){
[ -f /etc/redhat-release ] && awk '{print ($1,$3~/^[0-9]/?$3:$4)}' /etc/redhat-release && return
[ -f /etc/os-release ] && awk -F'[= "]' '/PRETTY_NAME/{print $3,$4,$5}' /etc/os-release && return
[ -f /etc/lsb-release ] && awk -F'[="]+' '/DESCRIPTION/{print $2}' /etc/lsb-release && return
}
get_os_info(){
IP=$( ip addr | egrep -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | egrep -v "^192\.168|^172\.1[6-9]\.|^172\.2[0-9]\.|^172\.3[0-2]\.|^10\.|^127\.|^255\.|^0\." | head -n 1 )
[ -z ${IP} ] && IP=$( wget -qO- -t1 -T2 ipv4.icanhazip.com )
local cname=$( awk -F: '/model name/ {name=$2} END {print name}' /proc/cpuinfo | sed 's/^[ \t]*//;s/[ \t]*$//' )
local cores=$( awk -F: '/model name/ {core++} END {print core}' /proc/cpuinfo )
local freq=$( awk -F: '/cpu MHz/ {freq=$2} END {print freq}' /proc/cpuinfo | sed 's/^[ \t]*//;s/[ \t]*$//' )
local tram=$( free -m | awk '/Mem/ {print $2}' )
local swap=$( free -m | awk '/Swap/ {print $2}' )
local up=$( awk '{a=$1/86400;b=($1%86400)/3600;c=($1%3600)/60;d=$1%60} {printf("%ddays, %d:%d:%d\n",a,b,c,d)}' /proc/uptime )
local load=$( w | head -1 | awk -F'load average:' '{print $2}' | sed 's/^[ \t]*//;s/[ \t]*$//' )
local opsy=$( get_opsy )
local arch=$( uname -m )
local lbit=$( getconf LONG_BIT )
local host=$( hostname )
local kern=$( uname -r )
echo "########## System Information ##########"
echo
echo "CPU model : ${cname}"
echo "Number of cores : ${cores}"
echo "CPU frequency : ${freq} MHz"
echo "Total amount of ram : ${tram} MB"
echo "Total amount of swap : ${swap} MB"
echo "System uptime : ${up}"
echo "Load average : ${load}"
echo "OS : ${opsy}"
echo "Arch : ${arch} (${lbit} Bit)"
echo "Kernel : ${kern}"
echo "Hostname : ${host}"
echo "IPv4 address : ${IP}"
echo
echo "########################################"
}
check_sys(){
local checkType=$1
local value=$2
local release=''
local systemPackage=''
if [[ -f /etc/redhat-release ]]; then
release="centos"
systemPackage="yum"
elif cat /etc/issue | grep -Eqi "debian"; then
release="debian"
systemPackage="apt"
elif cat /etc/issue | grep -Eqi "ubuntu"; then
release="ubuntu"
systemPackage="apt"
elif cat /etc/issue | grep -Eqi "centos|red hat|redhat"; then
release="centos"
systemPackage="yum"
elif cat /proc/version | grep -Eqi "debian"; then
release="debian"
systemPackage="apt"
elif cat /proc/version | grep -Eqi "ubuntu"; then
release="ubuntu"
systemPackage="apt"
elif cat /proc/version | grep -Eqi "centos|red hat|redhat"; then
release="centos"
systemPackage="yum"
fi
if [[ ${checkType} == "sysRelease" ]]; then
if [ "$value" == "$release" ];then
return 0
else
return 1
fi
elif [[ ${checkType} == "packageManager" ]]; then
if [ "$value" == "$systemPackage" ];then
return 0
else
return 1
fi
fi
}
rand(){
index=0
str=""
for i in {a..z}; do arr[index]=${i}; index=`expr ${index} + 1`; done
for i in {A..Z}; do arr[index]=${i}; index=`expr ${index} + 1`; done
for i in {0..9}; do arr[index]=${i}; index=`expr ${index} + 1`; done
for i in {1..10}; do str="$str${arr[$RANDOM%$index]}"; done
echo ${str}
}
is_64bit(){
if [ `getconf WORD_BIT` = '32' ] && [ `getconf LONG_BIT` = '64' ] ; then
return 0
else
return 1
fi
}
download_file(){
if [ -s ${1} ]; then
echo "$1 [found]"
else
echo "$1 not found!!!download now..."
if ! wget -c -t3 -T60 ${download_root_url}/${1}; then
echo "Failed to download $1, please download it to ${cur_dir} directory manually and try again."
exit 1
fi
fi
}
versionget(){
if [[ -s /etc/redhat-release ]];then
grep -oE "[0-9.]+" /etc/redhat-release
else
grep -oE "[0-9.]+" /etc/issue
fi
}
centosversion(){
if check_sys sysRelease centos;then
local code=${1}
local version="`versionget`"
local main_ver=${version%%.*}
if [ "${main_ver}" == "${code}" ];then
return 0
else
return 1
fi
else
return 1
fi
}
debianversion(){
if check_sys sysRelease debian;then
local version=$( get_opsy )
local code=${1}
local main_ver=$( echo ${version} | sed 's/[^0-9]//g')
if [ "${main_ver}" == "${code}" ];then
return 0
else
return 1
fi
else
return 1
fi
}
version_check(){
if check_sys packageManager yum; then
if centosversion 5; then
echo "Error: CentOS 5 is not supported, Please re-install OS and try again."
exit 1
fi
fi
}
get_char(){
SAVEDSTTY=`stty -g`
stty -echo
stty cbreak
dd if=/dev/tty bs=1 count=1 2> /dev/null
stty -raw
stty echo
stty $SAVEDSTTY
}
preinstall_l2tp(){
echo
if [ -d "/proc/vz" ]; then
echo -e "\033[41;37m WARNING: \033[0m Your VPS is based on OpenVZ, and IPSec might not be supported by the kernel."
echo "Continue installation? (y/n)"
read -p "(Default: n)" agree
[ -z ${agree} ] && agree="n"
if [ "${agree}" == "n" ]; then
echo
echo "L2TP installation cancelled."
echo
exit 0
fi
fi
echo
echo "Please enter IP-Range:"
read -p "(Default Range: 192.168.18):" iprange
[ -z ${iprange} ] && iprange="192.168.18"
echo "Please enter PSK:"
read -p "(Default PSK: teddysun.com):" mypsk
[ -z ${mypsk} ] && mypsk="teddysun.com"
echo "Please enter Username:"
read -p "(Default Username: teddysun):" username
[ -z ${username} ] && username="teddysun"
password=`rand`
echo "Please enter ${username}'s password:"
read -p "(Default Password: ${password}):" tmppassword
[ ! -z ${tmppassword} ] && password=${tmppassword}
echo
echo "ServerIP:${IP}"
echo "Server Local IP:${iprange}.1"
echo "Client Remote IP Range:${iprange}.2-${iprange}.254"
echo "PSK:${mypsk}"
echo
echo "Press any key to start... or press Ctrl + C to cancel."
char=`get_char`
}
install_l2tp(){
mknod /dev/random c 1 9
if check_sys packageManager apt; then
apt-get -y update
if debianversion 7; then
if is_64bit; then
local libnspr4_filename1="libnspr4_4.10.7-1_amd64.deb"
local libnspr4_filename2="libnspr4-0d_4.10.7-1_amd64.deb"
local libnspr4_filename3="libnspr4-dev_4.10.7-1_amd64.deb"
local libnspr4_filename4="libnspr4-dbg_4.10.7-1_amd64.deb"
local libnss3_filename1="libnss3_3.17.2-1.1_amd64.deb"
local libnss3_filename2="libnss3-1d_3.17.2-1.1_amd64.deb"
local libnss3_filename3="libnss3-tools_3.17.2-1.1_amd64.deb"
local libnss3_filename4="libnss3-dev_3.17.2-1.1_amd64.deb"
local libnss3_filename5="libnss3-dbg_3.17.2-1.1_amd64.deb"
else
local libnspr4_filename1="libnspr4_4.10.7-1_i386.deb"
local libnspr4_filename2="libnspr4-0d_4.10.7-1_i386.deb"
local libnspr4_filename3="libnspr4-dev_4.10.7-1_i386.deb"
local libnspr4_filename4="libnspr4-dbg_4.10.7-1_i386.deb"
local libnss3_filename1="libnss3_3.17.2-1.1_i386.deb"
local libnss3_filename2="libnss3-1d_3.17.2-1.1_i386.deb"
local libnss3_filename3="libnss3-tools_3.17.2-1.1_i386.deb"
local libnss3_filename4="libnss3-dev_3.17.2-1.1_i386.deb"
local libnss3_filename5="libnss3-dbg_3.17.2-1.1_i386.deb"
fi
rm -rf ${cur_dir}/l2tp
mkdir -p ${cur_dir}/l2tp
cd ${cur_dir}/l2tp
download_file "${libnspr4_filename1}"
download_file "${libnspr4_filename2}"
download_file "${libnspr4_filename3}"
download_file "${libnspr4_filename4}"
download_file "${libnss3_filename1}"
download_file "${libnss3_filename2}"
download_file "${libnss3_filename3}"
download_file "${libnss3_filename4}"
download_file "${libnss3_filename5}"
dpkg -i ${libnspr4_filename1} ${libnspr4_filename2} ${libnspr4_filename3} ${libnspr4_filename4}
dpkg -i ${libnss3_filename1} ${libnss3_filename2} ${libnss3_filename3} ${libnss3_filename4} ${libnss3_filename5}
apt-get -y install wget gcc ppp flex bison make pkg-config libpam0g-dev libcap-ng-dev iptables \
libcap-ng-utils libunbound-dev libevent-dev libcurl4-nss-dev libsystemd-daemon-dev
else
apt-get -y install wget gcc ppp flex bison make python libnss3-dev libnss3-tools libselinux-dev iptables \
libnspr4-dev pkg-config libpam0g-dev libcap-ng-dev libcap-ng-utils libunbound-dev \
libevent-dev libcurl4-nss-dev libsystemd-dev
fi
apt-get -y --no-install-recommends install xmlto
apt-get -y install xl2tpd
compile_install
elif check_sys packageManager yum; then
echo "Adding the EPEL repository..."
yum -y install epel-release yum-utils
[ ! -f /etc/yum.repos.d/epel.repo ] && echo "Install EPEL repository failed, please check it." && exit 1
yum-config-manager --enable epel
echo "Adding the EPEL repository complete..."
if centosversion 7; then
yum -y install ppp libreswan xl2tpd firewalld
yum_install
elif centosversion 6; then
yum -y remove libevent-devel
yum -y install libevent2-devel
yum -y install nss-devel nspr-devel pkgconfig pam-devel \
libcap-ng-devel libselinux-devel lsof \
curl-devel flex bison gcc ppp make iptables gmp-devel \
fipscheck-devel unbound-devel xmlto libpcap-devel xl2tpd
compile_install
fi
fi
}
config_install(){
cat > /etc/ipsec.conf<<EOF
version 2.0
config setup
protostack=netkey
nhelpers=0
uniqueids=no
interfaces=%defaultroute
virtual_private=%v4:10.0.0.0/8,%v4:192.168.0.0/16,%v4:172.16.0.0/12,%v4:!${iprange}.0/24
conn l2tp-psk
rightsubnet=vhost:%priv
also=l2tp-psk-nonat
conn l2tp-psk-nonat
authby=secret
pfs=no
auto=add
keyingtries=3
rekey=no
ikelifetime=8h
keylife=1h
type=transport
left=%defaultroute
leftid=${IP}
leftprotoport=17/1701
right=%any
rightprotoport=17/%any
dpddelay=40
dpdtimeout=130
dpdaction=clear
sha2-truncbug=yes
EOF
cat > /etc/ipsec.secrets<<EOF
%any %any : PSK "${mypsk}"
EOF
cat > /etc/xl2tpd/xl2tpd.conf<<EOF
[global]
port = 1701
[lns default]
ip range = ${iprange}.2-${iprange}.254
local ip = ${iprange}.1
require chap = yes
refuse pap = yes
require authentication = yes
name = l2tpd
ppp debug = yes
pppoptfile = /etc/ppp/options.xl2tpd
length bit = yes
EOF
cat > /etc/ppp/options.xl2tpd<<EOF
ipcp-accept-local
ipcp-accept-remote
require-mschap-v2
ms-dns 8.8.8.8
ms-dns 8.8.4.4
noccp
auth
hide-password
idle 1800
mtu 1410
mru 1410
nodefaultroute
debug
proxyarp
connect-delay 5000
EOF
rm -f /etc/ppp/chap-secrets
cat > /etc/ppp/chap-secrets<<EOF
# Secrets for authentication using CHAP
# client server secret IP addresses
${username} l2tpd ${password} *
EOF
}
compile_install(){
rm -rf ${cur_dir}/l2tp
mkdir -p ${cur_dir}/l2tp
cd ${cur_dir}/l2tp
download_file "${libreswan_filename}.tar.gz"
tar -zxf ${libreswan_filename}.tar.gz
cd ${cur_dir}/l2tp/${libreswan_filename}
cat > Makefile.inc.local <<'EOF'
WERROR_CFLAGS =
USE_DNSSEC = false
USE_DH31 = false
USE_GLIBC_KERN_FLIP_HEADERS = true
EOF
make programs && make install
/usr/local/sbin/ipsec --version >/dev/null 2>&1
if [ $? -ne 0 ]; then
echo "${libreswan_filename} install failed."
exit 1
fi
config_install
cp -pf /etc/sysctl.conf /etc/sysctl.conf.bak
sed -i 's/net.ipv4.ip_forward = 0/net.ipv4.ip_forward = 1/g' /etc/sysctl.conf
for each in `ls /proc/sys/net/ipv4/conf/`; do
echo "net.ipv4.conf.${each}.accept_source_route=0" >> /etc/sysctl.conf
echo "net.ipv4.conf.${each}.accept_redirects=0" >> /etc/sysctl.conf
echo "net.ipv4.conf.${each}.send_redirects=0" >> /etc/sysctl.conf
echo "net.ipv4.conf.${each}.rp_filter=0" >> /etc/sysctl.conf
done
sysctl -p
if centosversion 6; then
[ -f /etc/sysconfig/iptables ] && cp -pf /etc/sysconfig/iptables /etc/sysconfig/iptables.old.`date +%Y%m%d`
if [ "`iptables -L -n | grep -c '\-\-'`" == "0" ]; then
cat > /etc/sysconfig/iptables <<EOF
# Added by L2TP VPN script
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp --dport 22 -j ACCEPT
-A INPUT -p udp -m multiport --dports 500,4500,1701 -j ACCEPT
-A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
-A FORWARD -s ${iprange}.0/24 -j ACCEPT
COMMIT
*nat
:PREROUTING ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
-A POSTROUTING -s ${iprange}.0/24 -j SNAT --to-source ${IP}
COMMIT
EOF
else
iptables -I INPUT -p udp -m multiport --dports 500,4500,1701 -j ACCEPT
iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -I FORWARD -s ${iprange}.0/24 -j ACCEPT
iptables -t nat -A POSTROUTING -s ${iprange}.0/24 -j SNAT --to-source ${IP}
/etc/init.d/iptables save
fi
if [ ! -f /etc/ipsec.d/cert9.db ]; then
echo > /var/tmp/libreswan-nss-pwd
certutil -N -f /var/tmp/libreswan-nss-pwd -d /etc/ipsec.d
rm -f /var/tmp/libreswan-nss-pwd
fi
chkconfig --add iptables
chkconfig iptables on
chkconfig --add ipsec
chkconfig ipsec on
chkconfig --add xl2tpd
chkconfig xl2tpd on
/etc/init.d/iptables restart
/etc/init.d/ipsec start
/etc/init.d/xl2tpd start
else
[ -f /etc/iptables.rules ] && cp -pf /etc/iptables.rules /etc/iptables.rules.old.`date +%Y%m%d`
if [ "`iptables -L -n | grep -c '\-\-'`" == "0" ]; then
cat > /etc/iptables.rules <<EOF
# Added by L2TP VPN script
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp --dport 22 -j ACCEPT
-A INPUT -p udp -m multiport --dports 500,4500,1701 -j ACCEPT
-A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
-A FORWARD -s ${iprange}.0/24 -j ACCEPT
COMMIT
*nat
:PREROUTING ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
-A POSTROUTING -s ${iprange}.0/24 -j SNAT --to-source ${IP}
COMMIT
EOF
else
iptables -I INPUT -p udp -m multiport --dports 500,4500,1701 -j ACCEPT
iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -I FORWARD -s ${iprange}.0/24 -j ACCEPT
iptables -t nat -A POSTROUTING -s ${iprange}.0/24 -j SNAT --to-source ${IP}
/sbin/iptables-save > /etc/iptables.rules
fi
cat > /etc/network/if-up.d/iptables <<EOF
#!/bin/sh
/sbin/iptables-restore < /etc/iptables.rules
EOF
chmod +x /etc/network/if-up.d/iptables
if [ ! -f /etc/ipsec.d/cert9.db ]; then
echo > /var/tmp/libreswan-nss-pwd
certutil -N -f /var/tmp/libreswan-nss-pwd -d /etc/ipsec.d
rm -f /var/tmp/libreswan-nss-pwd
fi
update-rc.d -f xl2tpd defaults
cp -f /etc/rc.local /etc/rc.local.old.`date +%Y%m%d`
sed --follow-symlinks -i -e '/^exit 0/d' /etc/rc.local
cat >> /etc/rc.local <<EOF
# Added by L2TP VPN script
echo 1 > /proc/sys/net/ipv4/ip_forward
/usr/sbin/service ipsec start
exit 0
EOF
chmod +x /etc/rc.local
echo 1 > /proc/sys/net/ipv4/ip_forward
/sbin/iptables-restore < /etc/iptables.rules
/usr/sbin/service ipsec start
/usr/sbin/service xl2tpd restart
fi
}
yum_install(){
config_install
cp -pf /etc/sysctl.conf /etc/sysctl.conf.bak
echo "# Added by L2TP VPN" >> /etc/sysctl.conf
echo "net.ipv4.ip_forward=1" >> /etc/sysctl.conf
echo "net.ipv4.tcp_syncookies=1" >> /etc/sysctl.conf
echo "net.ipv4.icmp_echo_ignore_broadcasts=1" >> /etc/sysctl.conf
echo "net.ipv4.icmp_ignore_bogus_error_responses=1" >> /etc/sysctl.conf
for each in `ls /proc/sys/net/ipv4/conf/`; do
echo "net.ipv4.conf.${each}.accept_source_route=0" >> /etc/sysctl.conf
echo "net.ipv4.conf.${each}.accept_redirects=0" >> /etc/sysctl.conf
echo "net.ipv4.conf.${each}.send_redirects=0" >> /etc/sysctl.conf
echo "net.ipv4.conf.${each}.rp_filter=0" >> /etc/sysctl.conf
done
sysctl -p
cat > /etc/firewalld/services/xl2tpd.xml<<EOF
<?xml version="1.0" encoding="utf-8"?>
<service>
<short>xl2tpd</short>
<description>L2TP IPSec</description>
<port protocol="udp" port="4500"/>
<port protocol="udp" port="1701"/>
</service>
EOF
chmod 640 /etc/firewalld/services/xl2tpd.xml
systemctl enable ipsec
systemctl enable xl2tpd
systemctl enable firewalld
systemctl status firewalld > /dev/null 2>&1
if [ $? -eq 0 ]; then
firewall-cmd --reload
echo "Checking firewalld status..."
firewall-cmd --list-all
echo "add firewalld rules..."
firewall-cmd --permanent --add-service=ipsec
firewall-cmd --permanent --add-service=xl2tpd
firewall-cmd --permanent --add-masquerade
firewall-cmd --reload
else
echo "Firewalld looks like not running, trying to start..."
systemctl start firewalld
if [ $? -eq 0 ]; then
echo "Firewalld start successfully..."
firewall-cmd --reload
echo "Checking firewalld status..."
firewall-cmd --list-all
echo "adding firewalld rules..."
firewall-cmd --permanent --add-service=ipsec
firewall-cmd --permanent --add-service=xl2tpd
firewall-cmd --permanent --add-masquerade
firewall-cmd --reload
else
echo "Failed to start firewalld. please enable udp port 500 4500 1701 manually if necessary."
fi
fi
systemctl restart ipsec
systemctl restart xl2tpd
echo "Checking ipsec status..."
systemctl -a | grep ipsec
echo "Checking xl2tpd status..."
systemctl -a | grep xl2tpd
echo "Checking firewalld status..."
firewall-cmd --list-all
}
finally(){
cd ${cur_dir}
rm -fr ${cur_dir}/l2tp
# create l2tp command
cp -f ${cur_dir}/`basename $0` /usr/bin/l2tp
echo "Please wait a moment..."
sleep 5
ipsec verify
echo
echo "###############################################################"
echo "# L2TP VPN Auto Installer #"
echo "# System Supported: CentOS 6+ / Debian 7+ / Ubuntu 12+ #"
echo "# Intro: https://teddysun.com/448.html #"
echo "# Author: Teddysun <i@teddysun.com> #"
echo "###############################################################"
echo "If there is no [FAILED] above, you can connect to your L2TP "
echo "VPN Server with the default Username/Password is below:"
echo
echo "Server IP: ${IP}"
echo "PSK : ${mypsk}"
echo "Username : ${username}"
echo "Password : ${password}"
echo
echo "If you want to modify user settings, please use below command(s):"
echo "l2tp -a (Add a user)"
echo "l2tp -d (Delete a user)"
echo "l2tp -l (List all users)"
echo "l2tp -m (Modify a user password)"
echo
echo "Welcome to visit our website: https://teddysun.com/448.html"
echo "Enjoy it!"
echo
}
l2tp(){
clear
echo
echo "###############################################################"
echo "# L2TP VPN Auto Installer #"
echo "# System Supported: CentOS 6+ / Debian 7+ / Ubuntu 12+ #"
echo "# Intro: https://teddysun.com/448.html #"
echo "# Author: Teddysun <i@teddysun.com> #"
echo "###############################################################"
echo
rootness
tunavailable
disable_selinux
version_check
get_os_info
preinstall_l2tp
install_l2tp
finally
}
list_users(){
if [ ! -f /etc/ppp/chap-secrets ];then
echo "Error: /etc/ppp/chap-secrets file not found."
exit 1
fi
local line="+-------------------------------------------+\n"
local string=%20s
printf "${line}|${string} |${string} |\n${line}" Username Password
grep -v "^#" /etc/ppp/chap-secrets | awk '{printf "|'${string}' |'${string}' |\n", $1,$3}'
printf ${line}
}
add_user(){
while :
do
read -p "Please input your Username:" user
if [ -z ${user} ]; then
echo "Username can not be empty"
else
grep -w "${user}" /etc/ppp/chap-secrets > /dev/null 2>&1
if [ $? -eq 0 ];then
echo "Username (${user}) already exists. Please re-enter your username."
else
break
fi
fi
done
pass=`rand`
echo "Please input ${user}'s password:"
read -p "(Default Password: ${pass}):" tmppass
[ ! -z ${tmppass} ] && pass=${tmppass}
echo "${user} l2tpd ${pass} *" >> /etc/ppp/chap-secrets
echo "Username (${user}) add completed."
}
del_user(){
while :
do
read -p "Please input Username you want to delete it:" user
if [ -z ${user} ]; then
echo "Username can not be empty"
else
grep -w "${user}" /etc/ppp/chap-secrets >/dev/null 2>&1
if [ $? -eq 0 ];then
break
else
echo "Username (${user}) is not exists. Please re-enter your username."
fi
fi
done
sed -i "/^\<${user}\>/d" /etc/ppp/chap-secrets
echo "Username (${user}) delete completed."
}
mod_user(){
while :
do
read -p "Please input Username you want to change password:" user
if [ -z ${user} ]; then
echo "Username can not be empty"
else
grep -w "${user}" /etc/ppp/chap-secrets >/dev/null 2>&1
if [ $? -eq 0 ];then
break
else
echo "Username (${user}) is not exists. Please re-enter your username."
fi
fi
done
pass=`rand`
echo "Please input ${user}'s new password:"
read -p "(Default Password: ${pass}):" tmppass
[ ! -z ${tmppass} ] && pass=${tmppass}
sed -i "/^\<${user}\>/d" /etc/ppp/chap-secrets
echo "${user} l2tpd ${pass} *" >> /etc/ppp/chap-secrets
echo "Username ${user}'s password has been changed."
}
# Main process
action=$1
if [ -z ${action} ] && [ "`basename $0`" != "l2tp" ]; then
action=install
fi
case ${action} in
install)
l2tp 2>&1 | tee ${cur_dir}/l2tp.log
;;
-l|--list)
list_users
;;
-a|--add)
add_user
;;
-d|--del)
del_user
;;
-m|--mod)
mod_user
;;
-h|--help)
echo "Usage: `basename $0` -l,--list List all users"
echo " `basename $0` -a,--add Add a user"
echo " `basename $0` -d,--del Delete a user"
echo " `basename $0` -m,--mod Modify a user password"
echo " `basename $0` -h,--help Print this help information"
;;
*)
echo "Usage: `basename $0` [-l,--list|-a,--add|-d,--del|-m,--mod|-h,--help]" && exit
;;
esac