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[people/teissler/ipfire-2.x.git] / config / forwardfw / rules.pl
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1#!/usr/bin/perl
2###############################################################################
3# #
4# IPFire.org - A linux based firewall #
5# Copyright (C) 2012 #
6# #
7# This program is free software: you can redistribute it and/or modify #
8# it under the terms of the GNU General Public License as published by #
9# the Free Software Foundation, either version 3 of the License, or #
10# (at your option) any later version. #
11# #
12# This program is distributed in the hope that it will be useful, #
13# but WITHOUT ANY WARRANTY; without even the implied warranty of #
14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
15# GNU General Public License for more details. #
16# #
17# You should have received a copy of the GNU General Public License #
18# along with this program. If not, see <http://www.gnu.org/licenses/>. #
19# #
20###############################################################################
21# #
22# Hi folks! I hope this code is useful for all. I needed something to handle #
23# my VPN Connections in a comfortable way. #
24# This script builds firewallrules from the webinterface #
25###############################################################################
26
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27use strict;
28no warnings 'uninitialized';
29
30# enable only the following on debugging purpose
31#use warnings;
32#use CGI::Carp 'fatalsToBrowser';
33
34my %fwdfwsettings=();
35my %defaultNetworks=();
36my %configfwdfw=();
37my %color=();
38my %icmptypes=();
39my %ovpnSettings=();
40my %customgrp=();
41our %sourcehash=();
42our %targethash=();
43my @timeframe=();
44my %configinputfw=();
45my %aliases=();
46my @DPROT=();
36196d0d 47my @p2ps=();
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48require '/var/ipfire/general-functions.pl';
49require "${General::swroot}/lang.pl";
50require "${General::swroot}/forward/bin/firewall-lib.pl";
51
52my $configfwdfw = "${General::swroot}/forward/config";
53my $configinput = "${General::swroot}/forward/input";
36196d0d 54my $p2pfile = "${General::swroot}/forward/p2protocols";
2a81ab0d 55my $configgrp = "${General::swroot}/fwhosts/customgroups";
210ee67b 56my $netsettings = "${General::swroot}/ethernet/settings";
2a81ab0d 57my $errormessage='';
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58my $orange;
59my $green;
6adcf156 60my $blue;
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61my ($TYPE,$PROT,$SPROT,$DPROT,$SPORT,$DPORT,$TIME,$TIMEFROM,$TIMETILL,$SRC_TGT);
62my $CHAIN="FORWARDFW";
63
64
65&General::readhash("${General::swroot}/forward/settings", \%fwdfwsettings);
210ee67b 66&General::readhash("$netsettings", \%defaultNetworks);
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67&General::readhasharray($configfwdfw, \%configfwdfw);
68&General::readhasharray($configinput, \%configinputfw);
69&General::readhasharray($configgrp, \%customgrp);
70&General::get_aliases(\%aliases);
71
72################################
73# DEBUG/TEST #
74################################
54cb7ff0 75my $MODE=1; # 0 - normal operation
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76 # 1 - print configline and rules to console
77 #
78################################
79my $param=shift;
80
81if($param eq 'flush'){
82 if ($MODE eq '1'){
83 print " Flushing chains...\n";
84 }
85 &flush;
86}else{
87 if ($MODE eq '1'){
88 print " Flushing chains...\n";
89 }
90 &flush;
91 if ($MODE eq '1'){
92 print " Preparing rules...\n";
93 }
94 &preparerules;
95 if($MODE eq '0'){
96 if ($fwdfwsettings{'POLICY'} eq 'MODE1'){
af49e367 97 &p2pblock;
62fc8511 98 system ("/usr/sbin/firewall-forward-policy");
2a81ab0d 99 }elsif($fwdfwsettings{'POLICY'} eq 'MODE2'){
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100 $defaultNetworks{'GREEN_NETMASK'}=&General::iporsubtocidr($defaultNetworks{'GREEN_NETMASK'});
101 $green="$defaultNetworks{'GREEN_ADDRESS'}/$defaultNetworks{'GREEN_NETMASK'}";
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102 if ($defaultNetworks{'BLUE_DEV'}){
103 $defaultNetworks{'BLUE_NETMASK'}=&General::iporsubtocidr($defaultNetworks{'BLUE_NETMASK'});
104 $blue="$defaultNetworks{'BLUE_ADDRESS'}/$defaultNetworks{'BLUE_NETMASK'}";
105 #set default rules for BLUE
106 system ("iptables -A $CHAIN -s $blue -d $green -j RETURN");
107 }
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108 if ($defaultNetworks{'ORANGE_DEV'}){
109 $defaultNetworks{'ORANGE_NETMASK'}=&General::iporsubtocidr($defaultNetworks{'ORANGE_NETMASK'});
110 $orange="$defaultNetworks{'ORANGE_ADDRESS'}/$defaultNetworks{'ORANGE_NETMASK'}";
111 #set default rules for DMZ
112 system ("iptables -A $CHAIN -s $orange -d $green -j RETURN");
113 if ($defaultNetworks{'BLUE_DEV'}){
114 system ("iptables -A $CHAIN -s $orange -d $blue -j RETURN");
115 }
116 }
117
6adcf156 118 &p2pblock;
fd10a52c 119 system ("iptables -A $CHAIN -m state --state NEW -j ACCEPT");
210ee67b 120 system ("/usr/sbin/firewall-forward-policy");
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121 }
122 }
123}
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124sub flush
125{
126 system ("iptables -F FORWARDFW");
127 system ("iptables -F INPUTFW");
128}
129sub preparerules
130{
131 if (! -z "${General::swroot}/forward/config"){
132 &buildrules(\%configfwdfw);
133 }
134 if (! -z "${General::swroot}/forward/input"){
135 &buildrules(\%configinputfw);
136 }
137}
138sub buildrules
139{
140 my $hash=shift;
b5269091 141 my $STAG;
992394d5 142 foreach my $key (sort {$a <=> $b} keys %$hash){
b5269091 143 $STAG='';
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144 if($$hash{$key}[2] eq 'ON'){
145 #get source ip's
146 if ($$hash{$key}[3] eq 'cust_grp_src'){
992394d5 147 foreach my $grp (sort {$a <=> $b} keys %customgrp){
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148 if($customgrp{$grp}[0] eq $$hash{$key}[4]){
149 &get_address($customgrp{$grp}[3],$customgrp{$grp}[2],"src");
150 }
151 }
152 }else{
153 &get_address($$hash{$key}[3],$$hash{$key}[4],"src");
154 }
155 #get target ip's
156 if ($$hash{$key}[5] eq 'cust_grp_tgt'){
992394d5 157 foreach my $grp (sort {$a <=> $b} keys %customgrp){
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158 if($customgrp{$grp}[0] eq $$hash{$key}[6]){
159 &get_address($customgrp{$grp}[3],$customgrp{$grp}[2],"tgt");
160 }
161 }
162 }elsif($$hash{$key}[5] eq 'ipfire'){
14f7cb87 163
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164 if($$hash{$key}[6] eq 'Default IP'){
165 open(FILE, "/var/ipfire/red/local-ipaddress") or die 'Unable to open config file.';
166 $targethash{$key}[0]= <FILE>;
167 close(FILE);
168 }else{
169 foreach my $alias (sort keys %aliases){
170 if ($$hash{$key}[6] eq $alias){
171 $targethash{$key}[0]=$aliases{$alias}{'IPT'};
172 }
173 }
174 }
175 }else{
176 &get_address($$hash{$key}[5],$$hash{$key}[6],"tgt");
177 }
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178 ##get source prot and port
179 $SRC_TGT='SRC';
180 $SPROT = &get_prot($hash,$key);
181 $SPORT = &get_port($hash,$key);
182 $SRC_TGT='';
14f7cb87 183
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184 ##get target prot and port
185 $DPROT=&get_prot($hash,$key);
14f7cb87 186
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187 if ($DPROT eq ''){$DPROT=' ';}
188 @DPROT=split(",",$DPROT);
14f7cb87 189
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190 #get time if defined
191 if($$hash{$key}[18] eq 'ON'){
192 if($$hash{$key}[19] ne ''){push (@timeframe,"Mon");}
193 if($$hash{$key}[20] ne ''){push (@timeframe,"Tue");}
194 if($$hash{$key}[21] ne ''){push (@timeframe,"Wed");}
195 if($$hash{$key}[22] ne ''){push (@timeframe,"Thu");}
196 if($$hash{$key}[23] ne ''){push (@timeframe,"Fri");}
197 if($$hash{$key}[24] ne ''){push (@timeframe,"Sat");}
198 if($$hash{$key}[25] ne ''){push (@timeframe,"Sun");}
199 $TIME=join(",",@timeframe);
200 $TIMEFROM="--timestart $$hash{$key}[26] ";
201 $TIMETILL="--timestop $$hash{$key}[27] ";
202 $TIME="-m time --weekdays $TIME $TIMEFROM $TIMETILL";
203 }
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204 if ($MODE eq '1'){
205 print "NR:$key ";
206 foreach my $i (0 .. $#{$$hash{$key}}){
207 print "$i: $$hash{$key}[$i] ";
208 }
209 print "\n";
210 print"##################################\n";
211 #print rules to console
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212 foreach my $DPROT (@DPROT){
213 $DPORT = &get_port($hash,$key,$DPROT);
214 if ($SPROT ne ''){$PROT=$SPROT;}else{$PROT=$DPROT;}
215 $PROT="-p $PROT" if ($PROT ne '' && $PROT ne ' ');
216 foreach my $a (sort keys %sourcehash){
217 foreach my $b (sort keys %targethash){
d7dc9718 218 if ($sourcehash{$a}[0] ne $targethash{$b}[0] && $targethash{$b}[0] ne 'none' || $sourcehash{$a}[0] eq '0.0.0.0/0.0.0.0'){
2a81ab0d 219 if($SPROT eq '' || $SPROT eq $DPROT || $DPROT eq ' '){
54cb7ff0 220 if(substr($sourcehash{$a}[0], 3, 3) ne 'mac'){ $STAG="-s";}
2a81ab0d 221 if ($$hash{$key}[17] eq 'ON'){
b5269091 222 print "iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j LOG\n";
2a81ab0d 223 }
b5269091 224 print "iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j $$hash{$key}[0]\n";
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225 }
226 }
227 }
228 }
229 print"\n";
230 }
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231 }elsif($MODE eq '0'){
232 foreach my $DPROT (@DPROT){
233 $DPORT = &get_port($hash,$key,$DPROT);
234 if ($SPROT ne ''){$PROT=$SPROT;}else{$PROT=$DPROT;}
235 $PROT="-p $PROT" if ($PROT ne '' && $PROT ne ' ');
236 foreach my $a (sort keys %sourcehash){
237 foreach my $b (sort keys %targethash){
d7dc9718 238 if ($sourcehash{$a}[0] ne $targethash{$b}[0] && $targethash{$b}[0] ne 'none' || $sourcehash{$a}[0] eq '0.0.0.0/0.0.0.0'){
2a81ab0d 239 if($SPROT eq '' || $SPROT eq $DPROT || $DPROT eq ' '){
54cb7ff0 240 if(substr($sourcehash{$a}[0], 3, 3) ne 'mac'){ $STAG="-s";}
2a81ab0d 241 if ($$hash{$key}[17] eq 'ON'){
b5269091 242 system ("iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j LOG");
2a81ab0d 243 }
b5269091 244 system ("iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j $$hash{$key}[0]");
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245 }
246 }
247 }
248 }
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249 }
250 }
251 }
252 %sourcehash=();
253 %targethash=();
254 undef $TIME;
255 undef $TIMEFROM;
256 undef $TIMETILL;
257 }
258}
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259sub p2pblock
260{
261 my $P2PSTRING;
262 my $DO;
263 open( FILE, "< $p2pfile" ) or die "Unable to read $p2pfile";
264 @p2ps = <FILE>;
265 close FILE;
266 my $CMD = "-m ipp2p";
267 foreach my $p2pentry (sort @p2ps) {
268 my @p2pline = split( /\;/, $p2pentry );
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269 if ( $fwdfwsettings{'POLICY'} eq 'MODE1' ) {
270 $DO = "ACCEPT";
5238a871 271 if ("$p2pline[2]" eq "on") {
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272 $P2PSTRING = "$P2PSTRING --$p2pline[1]";
273 }
8d1beadc 274 }else {
36196d0d 275 $DO = "RETURN";
5238a871 276 if ("$p2pline[2]" eq "off") {
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277 $P2PSTRING = "$P2PSTRING --$p2pline[1]";
278 }
279 }
280 }
281 if ($MODE eq 1){
282 if($P2PSTRING){
283 print"/sbin/iptables -A FORWARDFW $CMD $P2PSTRING -j $DO\n";
284 }
285 }else{
286 if($P2PSTRING){
287 system("/sbin/iptables -A FORWARDFW $CMD $P2PSTRING -j $DO");
288 }
289 }
290}
291
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292sub get_address
293{
294 my $base=shift; #source of checking ($configfwdfw{$key}[x] or groupkey
295 my $base2=shift;
296 my $type=shift; #src or tgt
297 my $hash;
298 if ($type eq 'src'){
299 $hash=\%sourcehash;
300 }else{
301 $hash=\%targethash;
302 }
303 my $key = &General::findhasharraykey($hash);
304 if($base eq 'src_addr' || $base eq 'tgt_addr' ){
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305 if (&General::validmac($base2)){
306 $$hash{$key}[0] = "-m mac --mac-source $base2";
307 }else{
308 $$hash{$key}[0] = $base2;
309 }
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310 }elsif($base eq 'std_net_src' || $base eq 'std_net_tgt' || $base eq 'Standard Network'){
311 $$hash{$key}[0]=&fwlib::get_std_net_ip($base2);
312 }elsif($base eq 'cust_net_src' || $base eq 'cust_net_tgt' || $base eq 'Custom Network'){
313 $$hash{$key}[0]=&fwlib::get_net_ip($base2);
314 }elsif($base eq 'cust_host_src' || $base eq 'cust_host_tgt' || $base eq 'Custom Host'){
315 $$hash{$key}[0]=&fwlib::get_host_ip($base2,$type);
316 }elsif($base eq 'ovpn_net_src' || $base eq 'ovpn_net_tgt' || $base eq 'OpenVPN static network'){
317 $$hash{$key}[0]=&fwlib::get_ovpn_net_ip($base2,1);
318 }elsif($base eq 'ovpn_host_src' ||$base eq 'ovpn_host_tgt' || $base eq 'OpenVPN static host'){
319 $$hash{$key}[0]=&fwlib::get_ovpn_host_ip($base2,33);
320 }elsif($base eq 'ovpn_n2n_src' ||$base eq 'ovpn_n2n_tgt' || $base eq 'OpenVPN N-2-N'){
321 $$hash{$key}[0]=&fwlib::get_ovpn_n2n_ip($base2,27);
322 }elsif($base eq 'ipsec_net_src' || $base eq 'ipsec_net_tgt' || $base eq 'IpSec Network'){
323 $$hash{$key}[0]=&fwlib::get_ipsec_net_ip($base2,11);
324 }
325}
326sub get_prot
327{
328 my $hash=shift;
329 my $key=shift;
330 if ($$hash{$key}[7] eq 'ON' && $SRC_TGT eq 'SRC'){
331 if ($$hash{$key}[10] ne ''){
332 return"$$hash{$key}[8]";
333 }elsif($$hash{$key}[9] ne ''){
334 return"$$hash{$key}[8]";
335 }else{
336 return "$$hash{$key}[8]";
337 }
338 }elsif($$hash{$key}[11] eq 'ON' && $SRC_TGT eq ''){
339 if ($$hash{$key}[14] eq 'TGT_PORT'){
340 if ($$hash{$key}[15] ne ''){
341 return "$$hash{$key}[12]";
342 }elsif($$hash{$key}[13] ne ''){
343 return "$$hash{$key}[12]";
344 }else{
345 return "$$hash{$key}[12]";
346 }
347 }elsif($$hash{$key}[14] eq 'cust_srv'){
348 return &fwlib::get_srv_prot($$hash{$key}[15]);
349
350 }elsif($$hash{$key}[14] eq 'cust_srvgrp'){
351 return &fwlib::get_srvgrp_prot($$hash{$key}[15]);
352 }
353 }
354}
355sub get_port
356{
357 my $hash=shift;
358 my $key=shift;
359 my $prot=shift;
360 if ($$hash{$key}[7] eq 'ON' && $SRC_TGT eq 'SRC'){
361 if ($$hash{$key}[10] ne ''){
8f0b047b 362 $$hash{$key}[10] =~ s/\|/,/g;
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363 if(index($$hash{$key}[10],",") > 0){
364 return "-m multiport --sport $$hash{$key}[10] ";
365 }else{
366 return "--sport $$hash{$key}[10] ";
367 }
62fc8511 368 }elsif($$hash{$key}[9] ne '' && $$hash{$key}[9] ne 'All ICMP-Types'){
2a81ab0d 369 return "--icmp-type $$hash{$key}[9] ";
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370 }elsif($$hash{$key}[9] eq 'All ICMP-Types'){
371 return;
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372 }
373 }elsif($$hash{$key}[11] eq 'ON' && $SRC_TGT eq ''){
b5269091 374
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375 if($$hash{$key}[14] eq 'TGT_PORT'){
376 if ($$hash{$key}[15] ne ''){
8f0b047b 377 $$hash{$key}[15] =~ s/\|/,/g;
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378 if(index($$hash{$key}[15],",") > 0){
379 return "-m multiport --dport $$hash{$key}[15] ";
380 }else{
381 return "--dport $$hash{$key}[15] ";
382 }
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383 }elsif($$hash{$key}[13] ne '' && $$hash{$key}[13] ne 'All ICMP-Types'){
384 return "--icmp-type $$hash{$key}[13] ";
385 }elsif($$hash{$key}[13] ne '' && $$hash{$key}[13] eq 'All ICMP-Types'){
386 return;
387 }
388 }elsif($$hash{$key}[14] eq 'cust_srv'){
389 if ($prot ne 'ICMP'){
390 return "--dport ".&fwlib::get_srv_port($$hash{$key}[15],1,$prot);
391 }elsif($prot eq 'ICMP' && $$hash{$key}[15] ne 'All ICMP-Types'){
392 return "--icmp-type ".&fwlib::get_srv_port($$hash{$key}[15],3,$prot);
393 }elsif($prot eq 'ICMP' && $$hash{$key}[15] eq 'All ICMP-Types'){
394 return;
395 }
396 }elsif($$hash{$key}[14] eq 'cust_srvgrp'){
397 if ($prot ne 'ICMP'){
398 return &fwlib::get_srvgrp_port($$hash{$key}[15],$prot);
399 }
400 elsif($prot eq 'ICMP'){
401 return &fwlib::get_srvgrp_port($$hash{$key}[15],$prot);
402 }
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403 }
404 }
405}