| 1 | 2 | simandl | #! /bin/bash |
| 2 | | | # Firewall nove generace pro Czela Debian 3.0 |
| 3 | | | # Autor: Mirek Slugen |
| 4 | | | # Spoluatori: Michal Perlik, Michal Vondracek, Jan Chmelensky |
| 5 | | | # Vytvoreno: 06.11.2006 |
| 6 | | | # Naposledy zmeneno: 11.1.2009 |
| 7 | | | # Tento skript muzete volne sirit a upravovat. |
| 8 | | | # |
| 9 | | | # TODO: Dodelat nat typu tree, ktery potrebuje zjednoduseni, vycisteni kodu a testovani!!! |
| 10 | | | # |
| 11 | | | |
| 12 | | | # prevede /X na xxx.xxx.xxx.xxx |
| 13 | | | convert_net_to_mask() { |
| 14 | | | if let $(((32-$1) > 0)); then |
| 15 | | | M4=$(((255 << (32-$1)) & 255)) |
| 16 | | | else |
| 17 | | | M4=255 |
| 18 | | | fi |
| 19 | | | if let $(((24-$1) > 0)); then |
| 20 | | | M3=$(((255 << (24-$1)) & 255)) |
| 21 | | | else |
| 22 | | | M3=255 |
| 23 | | | fi |
| 24 | | | if let $(((16-$1) > 0)); then |
| 25 | | | M2=$(((255 << (16-$1)) & 255)) |
| 26 | | | else |
| 27 | | | M2=255 |
| 28 | | | fi |
| 29 | | | if let $(((8-$1) > 0)); then |
| 30 | | | M1=$(((255 << (8-$1)) & 255)) |
| 31 | | | else |
| 32 | | | M1=255 |
| 33 | | | fi |
| 34 | | | } |
| 35 | | | |
| 36 | | | # prevede napriklad 10.93.55.125/24 na 10.93.55.0/24 |
| 37 | | | convert_ip_to_network() { |
| 38 | | | IP_POM=($(tr '/' ' ' <<< "$1")) |
| 39 | | | BC=${IP_POM[1]} |
| 40 | | | IP_POM=($(tr '.' ' ' <<< "${IP_POM[0]}")) |
| 41 | | | BCN="$(($BC - 1))" |
| 42 | | | convert_net_to_mask "$BCN" |
| 43 | | | } |
| 44 | | | |
| 45 | | | # implementace natu |
| 46 | | | nat() { |
| 47 | | | # Tady zacina nat 1:1 |
| 48 | | | echo -n "Starting NAT 1:1..." |
| 49 | | | |
| 50 | | | # Kontrola na neexistujici konfiguracni soubor |
| 51 | | | if [ ! -e $NAT_CONFIG ] && [ "$NAT_TYPE" != "tree" ]; then |
| 52 | | | echo "error, $NAT_CONFIG does not exist!" |
| 53 | | | return 0 |
| 54 | | | fi |
| 55 | | | |
| 56 | | | [ "$DUMMY_IFACE" == "" ] && DUMMY_IFACE="dummy0" |
| 57 | | | [ "$DUMMY_IP" == "" ] && DUMMY_IP="`$IP addr show $DUMMY_IFACE | grep inet | grep -v inet6 | awk '{print \$2}' | cut -d \"/\" -f1`" |
| 58 | | | |
| 59 | | | if [ "$NAT_TYPE" == "tree" ]; then |
| 60 | | | # Zakladni cast celkem peti stromu |
| 61 | | | rm -rf $TMP |
| 62 | | | mkdir -p $TMP |
| 63 | | | # raw |
| 64 | | | echo "*raw" >> "$TMP/table_raw" |
| 65 | | | echo ":PREROUTING ACCEPT" >> "$TMP/table_raw" |
| 66 | | | echo ":OUTPUT ACCEPT" >> "$TMP/table_raw" |
| 67 | | | # nat |
| 68 | | | echo "*nat" >> "$TMP/table_nat2" |
| 69 | | | echo ":PREROUTING ACCEPT" >> "$TMP/table_nat2" |
| 70 | | | echo ":POSTROUTING ACCEPT" >> "$TMP/table_nat2" |
| 71 | | | echo ":OUTPUT ACCEPT" >> "$TMP/table_nat2" |
| 72 | | | # mangle |
| 73 | | | echo "*mangle" >> "$TMP/table_mangle" |
| 74 | | | echo ":PREROUTING ACCEPT" >> "$TMP/table_mangle" |
| 75 | | | echo ":INPUT ACCEPT" >> "$TMP/table_mangle" |
| 76 | | | echo ":FORWARD ACCEPT" >> "$TMP/table_mangle" |
| 77 | | | echo ":OUTPUT ACCEPT" >> "$TMP/table_mangle" |
| 78 | | | echo ":POSTROUTING ACCEPT" >> "$TMP/table_mangle" |
| 79 | | | # filter |
| 80 | | | echo "*filter" >> "$TMP/table_fwd2" |
| 81 | | | echo ":INPUT ACCEPT" >> "$TMP/table_fwd2" |
| 82 | | | echo ":FORWARD ACCEPT" >> "$TMP/table_fwd2" |
| 83 | | | echo ":OUTPUT ACCEPT" >> "$TMP/table_fwd2" |
| 84 | | | IP_POM="" |
| 85 | | | M1="" |
| 86 | | | M2="" |
| 87 | | | M3="" |
| 88 | | | M4="" |
| 89 | | | BC="" |
| 90 | | | BCN="" |
| 91 | | | # vytvorime zakladni chainy |
| 92 | | | convert_net_to_mask "`echo $INTERNAL_IP | cut -d/ -f2`" |
| 93 | | | INTERNAL_IP2="`echo $INTERNAL_IP | cut -d/ -f1`/$M1.$M2.$M3.$M4" |
| 94 | | | convert_net_to_mask "`echo $EXTERNAL_IP | cut -d/ -f2`" |
| 95 | | | EXTERNAL_IP2="`echo $EXTERNAL_IP | cut -d/ -f1`/$M1.$M2.$M3.$M4" |
| 96 | | | echo ":chain_fwd - [0:0]" >> "$TMP/table_fwd" |
| 97 | | | echo "-A FORWARD -s $INTERNAL_IP2 -i $NAT_DEV -j chain_fwd" >> "$TMP/table_fwd" |
| 98 | | | echo ":chain_pre - [0:0]" >> "$TMP/table_nat" |
| 99 | | | echo "-A PREROUTING -d $EXTERNAL_IP2 -i $NAT_DEV -j chain_pre" >> "$TMP/table_nat" |
| 100 | | | echo ":chain_pre_2 - [0:0]" >> "$TMP/table_nat" |
| 101 | | | echo "-A PREROUTING -s $INTERNAL_IP2 -d $EXTERNAL_IP2 ! -i $NAT_DEV -j chain_pre_2" >> "$TMP/table_nat" |
| 102 | | | echo ":chain_post - [0:0]" >> "$TMP/table_nat" |
| 103 | | | echo "-A POSTROUTING -s $INTERNAL_IP2 -o $NAT_DEV -j chain_post" >> "$TMP/table_nat" |
| 104 | | | echo ":chain_post_2 - [0:0]" >> "$TMP/table_nat" |
| 105 | | | echo "-A POSTROUTING -s $INTERNAL_IP2 -d $INTERNAL_IP2 ! -o $NAT_DEV -j chain_post_2" >> "$TMP/table_nat" |
| 106 | | | fi |
| 107 | | | |
| 108 | | | echo "" |
| 109 | | | # Ne vsude pouzivame jednotnou syntaxi |
| 110 | | | while read UserName PublicIP PrivateIP; do # standardni v Czela Debianu, podle me nejlepsi! :) |
| 111 | | | if [ "`echo $UserName | cut -c1`" == "#" ]; then |
| 112 | | | # Prazdne radky preskocime, jen neprazdne radky povazujeme za uzivatele, tj. oznamime je jako zakomentovane |
| 113 | | | if [ "`echo $UserName | cut -c2`" != " " ] && [ "`echo $UserName | cut -c2`" != "" ] && [ "`echo $UserName | cut -c2`" != "#" ]; then |
| 114 | | | echo " $UserName commented" |
| 115 | | | fi |
| 116 | | | else |
| 117 | | | echo " $UserName ($PrivateIP -> $PublicIP)" |
| 118 | | | for LOCAL_IP in $PrivateIP; do |
| 119 | | | PORT_TYPE="" |
| 120 | | | PUBLIC_PORT="" |
| 121 | | | PRIVATE_PORT="" |
| 122 | | | # rozdeleni na porty |
| 123 | | | if [ "`echo $LOCAL_IP | grep :`" != "" ]; then |
| 124 | | | PORT_TYPE="`echo $LOCAL_IP | cut -d: -f2`" |
| 125 | | | PUBLIC_PORT="`echo $LOCAL_IP | cut -d: -f3`" |
| 126 | | | PRIVATE_PORT="`echo $LOCAL_IP | cut -d: -f4`" |
| 127 | | | fi |
| 128 | | | # local ip musi byt jako posledni! |
| 129 | | | LOCAL_IP="`echo $LOCAL_IP | cut -d: -f1`" |
| 130 | | | if [ "`echo $PUBLIC_PORT | grep -`" != "" ]; then |
| 131 | | | PUBLIC_PORT="`echo $PUBLIC_PORT | cut -d- -f1`:`echo $PUBLIC_PORT | cut -d- -f2`" |
| 132 | | | fi |
| 133 | | | |
| 134 | | | if [ "$NAT_TYPE" == "tree" ]; then |
| 135 | | | LOCAL_IP3="" |
| 136 | | | if [ "`echo $LOCAL_IP | grep /`" == "" ]; then |
| 137 | | | LOCAL_IP2="$LOCAL_IP" |
| 138 | | | LOCAL_IP=$LOCAL_IP/32 |
| 139 | | | else |
| 140 | | | LOCAL_POM3="`echo $LOCAL_IP | cut -d/ -f2`" |
| 141 | | | if [ "$LOCAL_POM3" != "32" ]; then |
| 142 | | | convert_net_to_mask "$LOCAL_POM3" |
| 143 | | | LOCAL_IP2="`echo $LOCAL_IP | cut -d/ -f1`/$M1.$M2.$M3.$M4" |
| 144 | | | # pokud dostaneme zadany rozsah, pak natujeme na prvni adresu z daneho rozsahu |
| 145 | | | #LOCAL_IP3="`echo $LOCAL_IP | cut -d. -f1`.`echo $LOCAL_IP | cut -d. -f2`.`echo $LOCAL_IP | cut -d. -f3`.$((`echo $LOCAL_IP | cut -d. -f4 | cut -d/ -f1` + 1))" |
| 146 | | | LOCAL_IP3="`echo $LOCAL_IP | cut -d/ -f1`" |
| 147 | | | else |
| 148 | | | LOCAL_IP2="`echo $LOCAL_IP | cut -d/ -f1`" |
| 149 | | | fi |
| 150 | | | fi |
| 151 | | | if [ "`echo $PublicIP | grep /`" == "" ]; then |
| 152 | | | PublicIP2="$PublicIP" |
| 153 | | | PublicIP="${PublicIP}/32" |
| 154 | | | else |
| 155 | | | if [ "`echo $PublicIP | cut -d/ -f2`" != "32" ]; then |
| 156 | | | echo "Verejna adresa pro $UserName je zadana spatne!" |
| 157 | | | else |
| 158 | | | PublicIP2="`echo $PublicIP | cut -d/ -f1`" |
| 159 | | | fi |
| 160 | | | fi |
| 161 | | | # Tato cast je opet pro generovani stromu |
| 162 | | | # tam kde je rozdeleni podle INTERNAL_IP |
| 163 | | | # chain_post |
| 164 | | | I="0" |
| 165 | | | J="$((`echo $LOCAL_IP | cut -d/ -f2` - `echo $INTERNAL_IP | cut -d/ -f2`))" |
| 166 | | | IP_POM="$LOCAL_IP" |
| 167 | | | CHAINS_POST="" |
| 168 | | | CHAINS_POST_2="" |
| 169 | | | CHAINS_FWD="" |
| 170 | | | IP_POMS="" |
| 171 | | | while [ $I -lt $J ]; do |
| 172 | | | convert_ip_to_network "$IP_POM" |
| 173 | | | CHAIN="${IP_POM[0]}${IP_POM[1]}${IP_POM[2]}${IP_POM[3]}_$BC" |
| 174 | | | if [ "$I" == "0" ]; then |
| 175 | | | LOCAL_POM="$CHAIN" |
| 176 | | | fi |
| 177 | | | CHAIN_POST="chain_post_$CHAIN" |
| 178 | | | CHAIN_POST_2="chain_post_2_$CHAIN" |
| 179 | | | CHAIN_FWD="chain_fwd_$CHAIN" |
| 180 | | | echo ":$CHAIN_POST - [0:0]" >> "$TMP/table_nat" |
| 181 | | | echo ":$CHAIN_POST_2 - [0:0]" >> "$TMP/table_nat" |
| 182 | | | echo ":$CHAIN_FWD - [0:0]" >> "$TMP/table_fwd" |
| 183 | | | IP_POMS="${IP_POM[0]}.${IP_POM[1]}.${IP_POM[2]}.${IP_POM[3]}/$BC $IP_POMS" |
| 184 | | | CHAINS_POST="$CHAIN_POST $CHAINS_POST" |
| 185 | | | CHAINS_POST_2="$CHAIN_POST_2 $CHAINS_POST_2" |
| 186 | | | CHAINS_FWD="$CHAIN_FWD $CHAINS_FWD" |
| 187 | | | IP_POM="$((${IP_POM[0]} & $M1)).$((${IP_POM[1]} & $M2)).$((${IP_POM[2]} & $M3)).$((${IP_POM[3]} & $M4))/$BCN" |
| 188 | | | ((I++)) |
| 189 | | | done |
| 190 | | | CHAINS_POST="chain_post $CHAINS_POST" |
| 191 | | | CHAINS_POST_2="chain_post_2 $CHAINS_POST_2" |
| 192 | | | CHAINS_FWD="chain_fwd $CHAINS_FWD" |
| 193 | | | I="1" |
| 194 | | | for IP_POM in $IP_POMS; do |
| 195 | | | CHAIN_POST="`echo $CHAINS_POST | cut -d \" \" -f $I`" |
| 196 | | | CHAIN_POST_2="`echo $CHAINS_POST_2 | cut -d \" \" -f $I`" |
| 197 | | | CHAIN_FWD="`echo $CHAINS_FWD | cut -d \" \" -f $I`" |
| 198 | | | CHAIND_POST="`echo $CHAINS_POST | cut -d \" \" -f $(($I + 1))`" |
| 199 | | | CHAIND_POST_2="`echo $CHAINS_POST_2 | cut -d \" \" -f $(($I + 1))`" |
| 200 | | | CHAIND_FWD="`echo $CHAINS_FWD | cut -d \" \" -f $(($I + 1))`" |
| 201 | | | if [ "`echo $IP_POM | cut -d/ -f2`" != "32" ]; then |
| 202 | | | convert_net_to_mask "`echo $IP_POM | cut -d/ -f2`" |
| 203 | | | IP_POM="`echo $IP_POM | cut -d/ -f1`/$M1.$M2.$M3.$M4" |
| 204 | | | else |
| 205 | | | IP_POM="`echo $IP_POM | cut -d/ -f1`" |
| 206 | | | fi |
| 207 | | | echo "-A $CHAIN_POST -s $IP_POM -j $CHAIND_POST" >> "$TMP/table_nat" |
| 208 | | | echo "-A $CHAIN_POST_2 -d $IP_POM -j $CHAIND_POST_2" >> "$TMP/table_nat" |
| 209 | | | echo "-A $CHAIN_FWD -d $IP_POM -j $CHAIND_FWD" >> "$TMP/table_fwd" |
| 210 | | | ((I++)) |
| 211 | | | done |
| 212 | | | # pro ty kde je rozdeleni podle EXTERNAL_IP |
| 213 | | | # chain_pre |
| 214 | | | I="0" |
| 215 | | | J="$((`echo $PublicIP | cut -d/ -f2` - `echo $EXTERNAL_IP | cut -d/ -f2`))" |
| 216 | | | IP_POM="$PublicIP" |
| 217 | | | CHAINS_PRE="" |
| 218 | | | CHAINS_PRE_2="" |
| 219 | | | IP_POMS="" |
| 220 | | | while [ $I -lt $J ]; do |
| 221 | | | convert_ip_to_network "$IP_POM" |
| 222 | | | CHAIN="${IP_POM[0]}${IP_POM[1]}${IP_POM[2]}${IP_POM[3]}_$BC" |
| 223 | | | if [ "$I" == "0" ]; then |
| 224 | | | PUBLIC_POM="$CHAIN" |
| 225 | | | fi |
| 226 | | | CHAIN_PRE="chain_pre_$CHAIN" |
| 227 | | | CHAIN_PRE_2="chain_pre_2_$CHAIN" |
| 228 | | | echo ":$CHAIN_PRE - [0:0]" >> "$TMP/table_nat" |
| 229 | | | echo ":$CHAIN_PRE_2 - [0:0]" >> "$TMP/table_nat" |
| 230 | | | IP_POMS="${IP_POM[0]}.${IP_POM[1]}.${IP_POM[2]}.${IP_POM[3]}/$BC $IP_POMS" |
| 231 | | | CHAINS_PRE="$CHAIN_PRE $CHAINS_PRE" |
| 232 | | | CHAINS_PRE_2="$CHAIN_PRE_2 $CHAINS_PRE_2" |
| 233 | | | IP_POM="$((${IP_POM[0]} & $M1)).$((${IP_POM[1]} & $M2)).$((${IP_POM[2]} & $M3)).$((${IP_POM[3]} & $M4))/$BCN" |
| 234 | | | ((I++)) |
| 235 | | | done |
| 236 | | | CHAINS_PRE="chain_pre $CHAINS_PRE" |
| 237 | | | CHAINS_PRE_2="chain_pre_2 $CHAINS_PRE_2" |
| 238 | | | I="1" |
| 239 | | | for IP_POM in $IP_POMS; do |
| 240 | | | CHAIN_PRE="`echo $CHAINS_PRE | cut -d \" \" -f $I`" |
| 241 | | | CHAIN_PRE_2="`echo $CHAINS_PRE_2 | cut -d \" \" -f $I`" |
| 242 | | | CHAIND_PRE="`echo $CHAINS_PRE | cut -d \" \" -f $(($I + 1))`" |
| 243 | | | CHAIND_PRE_2="`echo $CHAINS_PRE_2 | cut -d \" \" -f $(($I + 1))`" |
| 244 | | | if [ "`echo $IP_POM | cut -d/ -f2`" != "32" ]; then |
| 245 | | | convert_net_to_mask "`echo $IP_POM | cut -d/ -f2`" |
| 246 | | | IP_POM="`echo $IP_POM | cut -d/ -f1`/$M1.$M2.$M3.$M4" |
| 247 | | | else |
| 248 | | | IP_POM="`echo $IP_POM | cut -d/ -f1`" |
| 249 | | | fi |
| 250 | | | echo "-A $CHAIN_PRE -d $IP_POM -j $CHAIND_PRE" >> "$TMP/table_nat" |
| 251 | | | echo "-A $CHAIN_PRE_2 -d $IP_POM -j $CHAIND_PRE_2" >> "$TMP/table_nat" |
| 252 | | | ((I++)) |
| 253 | | | done |
| 254 | | | # no a strom je za nami |
| 255 | | | # nat 1:1 |
| 256 | | | if [ "$PUBLIC_PORT" == "" ]; then |
| 257 | | | # Pokud je vice zaznamu na jednu verejnou ip adresu, pak bude plnohodnotna verejna jen ta prvni (jeste se to da zoptimalizovat o cca 15 vterin pro 1500 zaznamu) |
| 258 | | | if [ "`cat $TMP/table_nat | grep \"chain_pre_$PUBLIC_POM\" | grep DNAT | grep -v \"dport\" | cut -d \" \" -f 4`" != "$PublicIP2" ]; then |
| 259 | | | if [ "$LOCAL_IP3" != "" ]; then |
| 260 | | | echo "-A chain_pre_$PUBLIC_POM -d $PublicIP2 -j DNAT --to-destination $LOCAL_IP3" >> "$TMP/table_nat" |
| 261 | | | echo "-A chain_pre_2_$PUBLIC_POM -d $PublicIP2 -j DNAT --to-destination $LOCAL_IP3" >> "$TMP/table_nat" |
| 262 | | | echo "-A chain_post_2_$LOCAL_POM -d $LOCAL_IP3 -j SNAT --to-source $DUMMY_IP" >> "$TMP/table_nat" |
| 263 | | | else |
| 264 | | | echo "-A chain_pre_$PUBLIC_POM -d $PublicIP2 -j DNAT --to-destination $LOCAL_IP2" >> "$TMP/table_nat" |
| 265 | | | echo "-A chain_pre_2_$PUBLIC_POM -d $PublicIP2 -j DNAT --to-destination $LOCAL_IP2" >> "$TMP/table_nat" |
| 266 | | | echo "-A chain_post_2_$LOCAL_POM -d $LOCAL_IP2 -j SNAT --to-source $DUMMY_IP" >> "$TMP/table_nat" |
| 267 | | | fi |
| 268 | | | fi |
| 269 | | | # Pokud je vice zaznamu na jednu vnitrni ip adresu, pak zahlasime chybu, radeji otevirame fwd, ktery je kratsi! (totot jeste taky jde zoptimalizovat o cca 10 vterin pro 1500 zaznamu) |
| 270 | | | if [ "`cat $TMP/table_fwd | grep \"chain_fwd_$LOCAL_POM\" | grep ACCEPT | grep -v \"dport\" | cut -d \" \" -f 4`" != "$LOCAL_IP2" ]; then |
| 271 | | | echo "-A chain_post_"$LOCAL_POM" -s $LOCAL_IP2 -j SNAT --to-source $PublicIP2" >> "$TMP/table_nat" |
| 272 | | | echo "-A chain_fwd_$LOCAL_POM -d $LOCAL_IP2 -j ACCEPT" >> "$TMP/table_fwd" |
| 273 | | | else |
| 274 | | | echo "Chyba, zaznam pro lokalni adresu uz existuje!" |
| 275 | | | fi |
| 276 | | | elif [ "$PRIVATE_PORT" == "" ]; then |
| 277 | | | # Zatim neni jasne jestli porty funguji spravne!!! |
| 278 | | | # Ohlidani spravnosti je tu dost narocne, to proste musi byt spravne! |
| 279 | | | echo "-A chain_pre_$PUBLIC_POM -d $PublicIP2 -p $PORT_TYPE -m $PORT_TYPE --dport $PUBLIC_PORT -j DNAT --to-destination $LOCAL_IP2" >> "$TMP/table_nat" |
| 280 | | | echo "-A chain_post_"$LOCAL_POM" -s $LOCAL_IP2 -j SNAT --to-source $PublicIP2" >> "$TMP/table_nat" |
| 281 | | | echo "-A chain_fwd_$LOCAL_POM -d $LOCAL_IP2 -p $PORT_TYPE -m $PORT_TYPE --dport $PUBLIC_PORT -j ACCEPT" >> "$TMP/table_fwd" |
| 282 | | | echo "-A chain_pre_2_$PUBLIC_POM -d $PublicIP2 -j DNAT --to-destination $LOCAL_IP2" >> "$TMP/table_nat" |
| 283 | | | echo "-A chain_post_2_$LOCAL_POM -d $LOCAL_IP2 -j SNAT --to-source $DUMMY_IP" >> "$TMP/table_nat" |
| 284 | | | else |
| 285 | | | # Ohlidani spravnosti je tu dost narocne, to proste musi byt spravne! |
| 286 | | | echo "-A chain_pre_$PUBLIC_POM -d $PublicIP2 -p $PORT_TYPE -m $PORT_TYPE --dport $PUBLIC_PORT -j DNAT --to-destination $LOCAL_IP2:$PRIVATE_PORT" >> "$TMP/table_nat" |
| 287 | | | echo "-A chain_post_"$LOCAL_POM" -s $LOCAL_IP2 -j SNAT --to-source $PublicIP2" >> "$TMP/table_nat" |
| 288 | | | echo "-A chain_fwd_$LOCAL_POM -d $LOCAL_IP2 -p $PORT_TYPE -m $PORT_TYPE --dport $PRIVATE_PORT -j ACCEPT" >> "$TMP/table_fwd" |
| 289 | | | echo "-A chain_pre_2_$PUBLIC_POM -d $PublicIP2 -p $PORT_TYPE -m $PORT_TYPE --dport $PUBLIC_PORT -j DNAT --to-destination $LOCAL_IP2:$PRIVATE_PORT" >> "$TMP/table_nat" |
| 290 | | | echo "-A chain_post_2_$LOCAL_POM -d $LOCAL_IP2 -p $PORT_TYPE -m $PORT_TYPE --dport $PRIVATE_PORT -j SNAT --to-source $DUMMY_IP" >> "$TMP/table_nat" |
| 291 | | | fi |
| 292 | | | else |
| 293 | | | #echo $PublicIP $LOCAL_IP |
| 294 | | | # zakladni nat 1:1 - originalni verze |
| 295 | | | if [ "$PUBLIC_PORT" == "" ]; then |
| 296 | | | $IPTABLES -t nat -I PREROUTING -d $PublicIP -j DNAT --to $LOCAL_IP |
| 297 | | | $IPTABLES -t nat -I POSTROUTING -o $NAT_DEV -s $LOCAL_IP -j SNAT --to $PublicIP |
| 298 | | | $IPTABLES -I FORWARD -i $NAT_DEV -d $LOCAL_IP -j ACCEPT |
| 299 | | | elif [ "$PRIVATE_PORT" == "" ]; then |
| 300 | | | $IPTABLES -t nat -I PREROUTING -d $PublicIP -p $PORT_TYPE --dport $PUBLIC_PORT -j DNAT --to $LOCAL_IP |
| 301 | | | $IPTABLES -t nat -I POSTROUTING -o $NAT_DEV -s $LOCAL_IP -j SNAT --to $PublicIP |
| 302 | | | $IPTABLES -I FORWARD -i $NAT_DEV -d $LOCAL_IP -p $PORT_TYPE --dport $PUBLIC_PORT -j ACCEPT |
| 303 | | | else |
| 304 | | | $IPTABLES -t nat -I PREROUTING -d $PublicIP -p $PORT_TYPE --dport $PUBLIC_PORT -j DNAT --to $LOCAL_IP:$PRIVATE_PORT |
| 305 | | | $IPTABLES -t nat -I POSTROUTING -o $NAT_DEV -s $LOCAL_IP -j SNAT --to $PublicIP |
| 306 | | | $IPTABLES -I FORWARD -i $NAT_DEV -d $LOCAL_IP -p $PORT_TYPE --dport $PRIVATE_PORT -j ACCEPT |
| 307 | | | fi |
| 308 | | | # Zaroven by bylo pekne zevnitr site na svou verejnou ip pingnout, |
| 309 | | | # pro tohle je idealne nutne mit dummy, dalsi moznost je nastavit |
| 310 | | | # DUMMY_IFACE na jedno z rozhrani LAN, kde se neprovadi nat. |
| 311 | | | if [ "$DUMMY_IP" != "" ]; then |
| 312 | | | if [ "$PUBLIC_PORT" == "" ]; then |
| 313 | | | $IPTABLES -t nat -I PREROUTING ! -i $NAT_DEV -s $INTERNAL_IP -d $PublicIP -j DNAT --to $LOCAL_IP |
| 314 | | | $IPTABLES -t nat -I POSTROUTING ! -o $NAT_DEV -s $INTERNAL_IP -d $LOCAL_IP -j SNAT --to $DUMMY_IP |
| 315 | | | elif [ "$PRIVATE_PORT" == "" ]; then |
| 316 | | | $IPTABLES -t nat -I PREROUTING ! -i $NAT_DEV -s $INTERNAL_IP -d $PublicIP -p $PORT_TYPE --dport $PUBLIC_PORT -j DNAT --to $LOCAL_IP |
| 317 | | | $IPTABLES -t nat -I POSTROUTING ! -o $NAT_DEV -s $INTERNAL_IP -d $LOCAL_IP -p $PORT_TYPE --dport $PUBLIC_PORT -j SNAT --to $DUMMY_IP |
| 318 | | | else |
| 319 | | | $IPTABLES -t nat -I PREROUTING ! -i $NAT_DEV -s $INTERNAL_IP -d $PublicIP -p $PORT_TYPE --dport $PUBLIC_PORT -j DNAT --to $LOCAL_IP:$PRIVATE_PORT |
| 320 | | | $IPTABLES -t nat -I POSTROUTING ! -o $NAT_DEV -s $INTERNAL_IP -d $LOCAL_IP -p $PORT_TYPE --dport $PRIVATE_PORT -j SNAT --to $DUMMY_IP |
| 321 | | | fi |
| 322 | | | fi |
| 323 | | | fi |
| 324 | | | done |
| 325 | | | fi |
| 326 | | | done < $NAT_CONFIG |
| 327 | | | |
| 328 | | | # V pripade typu natu "tree", musime spojit soubory do jedine tabulky |
| 329 | | | if [ "$NAT_TYPE" == "tree" ]; then |
| 330 | | | cat $TMP/table_nat | sort -k 2.1 | uniq >> $TMP/table_nat2 |
| 331 | | | cat $TMP/table_fwd | sort -k 2.1 | uniq >> $TMP/table_fwd2 |
| 332 | | | cat "$TMP/table_raw" >> "$TMP/table" |
| 333 | | | echo "COMMIT" >> "$TMP/table" |
| 334 | | | cat "$TMP/table_nat2" >> "$TMP/table" |
| 335 | | | echo "COMMIT" >> "$TMP/table" |
| 336 | | | cat "$TMP/table_mangle" >> "$TMP/table" |
| 337 | | | echo "COMMIT" >> "$TMP/table" |
| 338 | | | cat "$TMP/table_fwd2" >> "$TMP/table" |
| 339 | | | echo "COMMIT" >> "$TMP/table" |
| 340 | | | echo "done." |
| 341 | | | fi |
| 342 | | | } |
