Forward Firewall: when resetting firewall, an error was generated in log, because...
[people/teissler/ipfire-2.x.git] / config / forwardfw / rules.pl
CommitLineData
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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 $green;
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60my ($TYPE,$PROT,$SPROT,$DPROT,$SPORT,$DPORT,$TIME,$TIMEFROM,$TIMETILL,$SRC_TGT);
61my $CHAIN="FORWARDFW";
62
63
64&General::readhash("${General::swroot}/forward/settings", \%fwdfwsettings);
210ee67b 65&General::readhash("$netsettings", \%defaultNetworks);
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66&General::readhasharray($configfwdfw, \%configfwdfw);
67&General::readhasharray($configinput, \%configinputfw);
68&General::readhasharray($configgrp, \%customgrp);
69&General::get_aliases(\%aliases);
70
71################################
72# DEBUG/TEST #
73################################
54cb7ff0 74my $MODE=1; # 0 - normal operation
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75 # 1 - print configline and rules to console
76 #
77################################
78my $param=shift;
79
80if($param eq 'flush'){
81 if ($MODE eq '1'){
82 print " Flushing chains...\n";
83 }
84 &flush;
85}else{
86 if ($MODE eq '1'){
87 print " Flushing chains...\n";
88 }
89 &flush;
90 if ($MODE eq '1'){
91 print " Preparing rules...\n";
92 }
93 &preparerules;
94 if($MODE eq '0'){
95 if ($fwdfwsettings{'POLICY'} eq 'MODE1'){
af49e367 96 &p2pblock;
62fc8511 97 system ("/usr/sbin/firewall-forward-policy");
2a81ab0d 98 }elsif($fwdfwsettings{'POLICY'} eq 'MODE2'){
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99 if ($defaultNetworks{'ORANGE_DEV'}){
100 $defaultNetworks{'ORANGE_NETMASK'}=&General::iporsubtocidr($defaultNetworks{'ORANGE_NETMASK'});
101 $defaultNetworks{'GREEN_NETMASK'}=&General::iporsubtocidr($defaultNetworks{'GREEN_NETMASK'});
102 $orange="$defaultNetworks{'ORANGE_ADDRESS'}/$defaultNetworks{'ORANGE_NETMASK'}";
103 $green="$defaultNetworks{'GREEN_ADDRESS'}/$defaultNetworks{'GREEN_NETMASK'}";
104 #set default rules for DMZ
105 system ("iptables -A $CHAIN -s $orange -d $green -j RETURN");
106 &p2pblock;
107 }
fd10a52c 108 system ("iptables -A $CHAIN -m state --state NEW -j ACCEPT");
210ee67b 109 system ("/usr/sbin/firewall-forward-policy");
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110 }
111 }
112}
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113sub flush
114{
115 system ("iptables -F FORWARDFW");
116 system ("iptables -F INPUTFW");
117}
118sub preparerules
119{
120 if (! -z "${General::swroot}/forward/config"){
121 &buildrules(\%configfwdfw);
122 }
123 if (! -z "${General::swroot}/forward/input"){
124 &buildrules(\%configinputfw);
125 }
126}
127sub buildrules
128{
129 my $hash=shift;
b5269091 130 my $STAG;
992394d5 131 foreach my $key (sort {$a <=> $b} keys %$hash){
b5269091 132 $STAG='';
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133 if($$hash{$key}[2] eq 'ON'){
134 #get source ip's
135 if ($$hash{$key}[3] eq 'cust_grp_src'){
992394d5 136 foreach my $grp (sort {$a <=> $b} keys %customgrp){
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137 if($customgrp{$grp}[0] eq $$hash{$key}[4]){
138 &get_address($customgrp{$grp}[3],$customgrp{$grp}[2],"src");
139 }
140 }
141 }else{
142 &get_address($$hash{$key}[3],$$hash{$key}[4],"src");
143 }
144 #get target ip's
145 if ($$hash{$key}[5] eq 'cust_grp_tgt'){
992394d5 146 foreach my $grp (sort {$a <=> $b} keys %customgrp){
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147 if($customgrp{$grp}[0] eq $$hash{$key}[6]){
148 &get_address($customgrp{$grp}[3],$customgrp{$grp}[2],"tgt");
149 }
150 }
151 }elsif($$hash{$key}[5] eq 'ipfire'){
14f7cb87 152
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153 if($$hash{$key}[6] eq 'Default IP'){
154 open(FILE, "/var/ipfire/red/local-ipaddress") or die 'Unable to open config file.';
155 $targethash{$key}[0]= <FILE>;
156 close(FILE);
157 }else{
158 foreach my $alias (sort keys %aliases){
159 if ($$hash{$key}[6] eq $alias){
160 $targethash{$key}[0]=$aliases{$alias}{'IPT'};
161 }
162 }
163 }
164 }else{
165 &get_address($$hash{$key}[5],$$hash{$key}[6],"tgt");
166 }
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167 ##get source prot and port
168 $SRC_TGT='SRC';
169 $SPROT = &get_prot($hash,$key);
170 $SPORT = &get_port($hash,$key);
171 $SRC_TGT='';
14f7cb87 172
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173 ##get target prot and port
174 $DPROT=&get_prot($hash,$key);
14f7cb87 175
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176 if ($DPROT eq ''){$DPROT=' ';}
177 @DPROT=split(",",$DPROT);
14f7cb87 178
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179 #get time if defined
180 if($$hash{$key}[18] eq 'ON'){
181 if($$hash{$key}[19] ne ''){push (@timeframe,"Mon");}
182 if($$hash{$key}[20] ne ''){push (@timeframe,"Tue");}
183 if($$hash{$key}[21] ne ''){push (@timeframe,"Wed");}
184 if($$hash{$key}[22] ne ''){push (@timeframe,"Thu");}
185 if($$hash{$key}[23] ne ''){push (@timeframe,"Fri");}
186 if($$hash{$key}[24] ne ''){push (@timeframe,"Sat");}
187 if($$hash{$key}[25] ne ''){push (@timeframe,"Sun");}
188 $TIME=join(",",@timeframe);
189 $TIMEFROM="--timestart $$hash{$key}[26] ";
190 $TIMETILL="--timestop $$hash{$key}[27] ";
191 $TIME="-m time --weekdays $TIME $TIMEFROM $TIMETILL";
192 }
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193 if ($MODE eq '1'){
194 print "NR:$key ";
195 foreach my $i (0 .. $#{$$hash{$key}}){
196 print "$i: $$hash{$key}[$i] ";
197 }
198 print "\n";
199 print"##################################\n";
200 #print rules to console
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201 foreach my $DPROT (@DPROT){
202 $DPORT = &get_port($hash,$key,$DPROT);
203 if ($SPROT ne ''){$PROT=$SPROT;}else{$PROT=$DPROT;}
204 $PROT="-p $PROT" if ($PROT ne '' && $PROT ne ' ');
205 foreach my $a (sort keys %sourcehash){
206 foreach my $b (sort keys %targethash){
d7dc9718 207 if ($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 208 if($SPROT eq '' || $SPROT eq $DPROT || $DPROT eq ' '){
54cb7ff0 209 if(substr($sourcehash{$a}[0], 3, 3) ne 'mac'){ $STAG="-s";}
2a81ab0d 210 if ($$hash{$key}[17] eq 'ON'){
b5269091 211 print "iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j LOG\n";
2a81ab0d 212 }
b5269091 213 print "iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j $$hash{$key}[0]\n";
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214 }
215 }
216 }
217 }
218 print"\n";
219 }
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220 }elsif($MODE eq '0'){
221 foreach my $DPROT (@DPROT){
222 $DPORT = &get_port($hash,$key,$DPROT);
223 if ($SPROT ne ''){$PROT=$SPROT;}else{$PROT=$DPROT;}
224 $PROT="-p $PROT" if ($PROT ne '' && $PROT ne ' ');
225 foreach my $a (sort keys %sourcehash){
226 foreach my $b (sort keys %targethash){
d7dc9718 227 if ($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 228 if($SPROT eq '' || $SPROT eq $DPROT || $DPROT eq ' '){
54cb7ff0 229 if(substr($sourcehash{$a}[0], 3, 3) ne 'mac'){ $STAG="-s";}
2a81ab0d 230 if ($$hash{$key}[17] eq 'ON'){
b5269091 231 system ("iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j LOG");
2a81ab0d 232 }
b5269091 233 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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234 }
235 }
236 }
237 }
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238 }
239 }
240 }
241 %sourcehash=();
242 %targethash=();
243 undef $TIME;
244 undef $TIMEFROM;
245 undef $TIMETILL;
246 }
247}
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248sub p2pblock
249{
250 my $P2PSTRING;
251 my $DO;
252 open( FILE, "< $p2pfile" ) or die "Unable to read $p2pfile";
253 @p2ps = <FILE>;
254 close FILE;
255 my $CMD = "-m ipp2p";
256 foreach my $p2pentry (sort @p2ps) {
257 my @p2pline = split( /\;/, $p2pentry );
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258 if ( $fwdfwsettings{'POLICY'} eq 'MODE1' ) {
259 $DO = "ACCEPT";
5238a871 260 if ("$p2pline[2]" eq "on") {
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261 $P2PSTRING = "$P2PSTRING --$p2pline[1]";
262 }
8d1beadc 263 }else {
36196d0d 264 $DO = "RETURN";
5238a871 265 if ("$p2pline[2]" eq "off") {
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266 $P2PSTRING = "$P2PSTRING --$p2pline[1]";
267 }
268 }
269 }
270 if ($MODE eq 1){
271 if($P2PSTRING){
272 print"/sbin/iptables -A FORWARDFW $CMD $P2PSTRING -j $DO\n";
273 }
274 }else{
275 if($P2PSTRING){
276 system("/sbin/iptables -A FORWARDFW $CMD $P2PSTRING -j $DO");
277 }
278 }
279}
280
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281sub get_address
282{
283 my $base=shift; #source of checking ($configfwdfw{$key}[x] or groupkey
284 my $base2=shift;
285 my $type=shift; #src or tgt
286 my $hash;
287 if ($type eq 'src'){
288 $hash=\%sourcehash;
289 }else{
290 $hash=\%targethash;
291 }
292 my $key = &General::findhasharraykey($hash);
293 if($base eq 'src_addr' || $base eq 'tgt_addr' ){
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294 if (&General::validmac($base2)){
295 $$hash{$key}[0] = "-m mac --mac-source $base2";
296 }else{
297 $$hash{$key}[0] = $base2;
298 }
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299 }elsif($base eq 'std_net_src' || $base eq 'std_net_tgt' || $base eq 'Standard Network'){
300 $$hash{$key}[0]=&fwlib::get_std_net_ip($base2);
301 }elsif($base eq 'cust_net_src' || $base eq 'cust_net_tgt' || $base eq 'Custom Network'){
302 $$hash{$key}[0]=&fwlib::get_net_ip($base2);
303 }elsif($base eq 'cust_host_src' || $base eq 'cust_host_tgt' || $base eq 'Custom Host'){
304 $$hash{$key}[0]=&fwlib::get_host_ip($base2,$type);
305 }elsif($base eq 'ovpn_net_src' || $base eq 'ovpn_net_tgt' || $base eq 'OpenVPN static network'){
306 $$hash{$key}[0]=&fwlib::get_ovpn_net_ip($base2,1);
307 }elsif($base eq 'ovpn_host_src' ||$base eq 'ovpn_host_tgt' || $base eq 'OpenVPN static host'){
308 $$hash{$key}[0]=&fwlib::get_ovpn_host_ip($base2,33);
309 }elsif($base eq 'ovpn_n2n_src' ||$base eq 'ovpn_n2n_tgt' || $base eq 'OpenVPN N-2-N'){
310 $$hash{$key}[0]=&fwlib::get_ovpn_n2n_ip($base2,27);
311 }elsif($base eq 'ipsec_net_src' || $base eq 'ipsec_net_tgt' || $base eq 'IpSec Network'){
312 $$hash{$key}[0]=&fwlib::get_ipsec_net_ip($base2,11);
313 }
314}
315sub get_prot
316{
317 my $hash=shift;
318 my $key=shift;
319 if ($$hash{$key}[7] eq 'ON' && $SRC_TGT eq 'SRC'){
320 if ($$hash{$key}[10] ne ''){
321 return"$$hash{$key}[8]";
322 }elsif($$hash{$key}[9] ne ''){
323 return"$$hash{$key}[8]";
324 }else{
325 return "$$hash{$key}[8]";
326 }
327 }elsif($$hash{$key}[11] eq 'ON' && $SRC_TGT eq ''){
328 if ($$hash{$key}[14] eq 'TGT_PORT'){
329 if ($$hash{$key}[15] ne ''){
330 return "$$hash{$key}[12]";
331 }elsif($$hash{$key}[13] ne ''){
332 return "$$hash{$key}[12]";
333 }else{
334 return "$$hash{$key}[12]";
335 }
336 }elsif($$hash{$key}[14] eq 'cust_srv'){
337 return &fwlib::get_srv_prot($$hash{$key}[15]);
338
339 }elsif($$hash{$key}[14] eq 'cust_srvgrp'){
340 return &fwlib::get_srvgrp_prot($$hash{$key}[15]);
341 }
342 }
343}
344sub get_port
345{
346 my $hash=shift;
347 my $key=shift;
348 my $prot=shift;
349 if ($$hash{$key}[7] eq 'ON' && $SRC_TGT eq 'SRC'){
350 if ($$hash{$key}[10] ne ''){
8f0b047b 351 $$hash{$key}[10] =~ s/\|/,/g;
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352 if(index($$hash{$key}[10],",") > 0){
353 return "-m multiport --sport $$hash{$key}[10] ";
354 }else{
355 return "--sport $$hash{$key}[10] ";
356 }
62fc8511 357 }elsif($$hash{$key}[9] ne '' && $$hash{$key}[9] ne 'All ICMP-Types'){
2a81ab0d 358 return "--icmp-type $$hash{$key}[9] ";
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359 }elsif($$hash{$key}[9] eq 'All ICMP-Types'){
360 return;
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361 }
362 }elsif($$hash{$key}[11] eq 'ON' && $SRC_TGT eq ''){
b5269091 363
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364 if($$hash{$key}[14] eq 'TGT_PORT'){
365 if ($$hash{$key}[15] ne ''){
8f0b047b 366 $$hash{$key}[15] =~ s/\|/,/g;
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367 if(index($$hash{$key}[15],",") > 0){
368 return "-m multiport --dport $$hash{$key}[15] ";
369 }else{
370 return "--dport $$hash{$key}[15] ";
371 }
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372 }elsif($$hash{$key}[13] ne '' && $$hash{$key}[13] ne 'All ICMP-Types'){
373 return "--icmp-type $$hash{$key}[13] ";
374 }elsif($$hash{$key}[13] ne '' && $$hash{$key}[13] eq 'All ICMP-Types'){
375 return;
376 }
377 }elsif($$hash{$key}[14] eq 'cust_srv'){
378 if ($prot ne 'ICMP'){
379 return "--dport ".&fwlib::get_srv_port($$hash{$key}[15],1,$prot);
380 }elsif($prot eq 'ICMP' && $$hash{$key}[15] ne 'All ICMP-Types'){
381 return "--icmp-type ".&fwlib::get_srv_port($$hash{$key}[15],3,$prot);
382 }elsif($prot eq 'ICMP' && $$hash{$key}[15] eq 'All ICMP-Types'){
383 return;
384 }
385 }elsif($$hash{$key}[14] eq 'cust_srvgrp'){
386 if ($prot ne 'ICMP'){
387 return &fwlib::get_srvgrp_port($$hash{$key}[15],$prot);
388 }
389 elsif($prot eq 'ICMP'){
390 return &fwlib::get_srvgrp_port($$hash{$key}[15],$prot);
391 }
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392 }
393 }
394}