Code optimization
bbruns
parent
34fa66b7ba
commit
6c03b7d069
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@ -3,6 +3,8 @@
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fix an issue I noticed during testing
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- Move icmp allow code
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- Prevent duplicate icmp allow rules in NAT code
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- NETMAP support in NAT code
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- Removed pointless(?) and unneeded dupe codeâ
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0.9.9a - Brielle Bruns <bruns@2mbit.com>
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- Minor bug fixes for my coding errors introduced in
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@ -530,7 +530,7 @@ fi
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if [ $NAT ]; then
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if [ "$NAT_RANGE" ]; then
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display_c YELLOW "Adding NAT rule:"
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unset INIF_EXISTS OUTIF_EXISTS
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unset INIF_EXISTS FWDIF_EXISTS
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for i in $NAT_RANGE; do
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NAT_RULE=( ${i//:/ } )
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case ${NAT_RULE[0]} in
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@ -538,38 +538,62 @@ if [ $NAT ]; then
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$IPTABLES -A POSTROUTING -t nat -s ${NAT_RULE[2]} -j SNAT \
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-o ${NAT_RULE[3]} --to-source ${NAT_RULE[4]}
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display_c DEFAULT "\t${GREEN}SNAT:${PURPLE}${NAT_RULE[1]}:${NAT_RULE[2]}${AQUA}->${BLUE}${NAT_RULE[3]}:${NAT_RULE[4]}"
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if [[ ! "$INIF_EXISTS" =~ "${NAT_RULE[1]}" ]]; then
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$IPTABLES -A INPUT -p icmp --icmp-type time-exceeded -i ${NAT_RULE[1]} -j ACCEPT
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$IPTABLES -A INPUT -p icmp --icmp-type fragmentation-needed -i ${NAT_RULE[1]} -j ACCEPT
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INIF_EXISTS="${INIF_EXISTS} $i"
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if [[ ! "$INIF_EXISTS" =~ "${NAT_RULE[1]}:${NAT_RULE[2]}" ]]; then
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$IPTABLES -A INPUT -p icmp --icmp-type time-exceeded -i ${NAT_RULE[1]} \
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-s ${NAT_RULE[2]} -j ACCEPT
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$IPTABLES -A INPUT -p icmp --icmp-type fragmentation-needed -i ${NAT_RULE[1]} \
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-s ${NAT_RULE[2]} -j ACCEPT
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INIF_EXISTS="${INIF_EXISTS} ${NAT_RULE[1]}:${NAT_RULE[2]}"
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fi
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if [[ ! "$OUTIF_EXISTS" =~ "${NAT_RULE[3]}" ]]; then
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$IPTABLES -A OUTPUT -p icmp --icmp-type time-exceeded -o ${NAT_RULE[3]} -j ACCEPT
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$IPTABLES -A OUTPUT -p icmp --icmp-type fragmentation-needed -o ${NAT_RULE[3]} -j ACCEPT
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OUTIF_EXISTS="${OUTIF_EXISTS} $i"
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# This code seems pointless, anyone else have an opinion?
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#if [[ ! "$OUTIF_EXISTS" =~ "${NAT_RULE[3]}:${NAT_RULE[4]}" ]]; then
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# $IPTABLES -A OUTPUT -p icmp --icmp-type time-exceeded -o ${NAT_RULE[3]} -j ACCEPT
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# $IPTABLES -A OUTPUT -p icmp --icmp-type fragmentation-needed -o ${NAT_RULE[3]} -j ACCEPT
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# OUTIF_EXISTS="${OUTIF_EXISTS} ${NAT_RULE[3]}:${NAT_RULE[4]}"
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#fi
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if [[ ! "$FWDIF_EXISTS" =~ "${NAT_RULE[1]}:${NAT_RULE[2]}:${NAT_RULE[3]}" ]]; then
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$IPTABLES -A FORWARD -p icmp --icmp-type time-exceeded -i ${NAT_RULE[1]} -s ${NAT_RULE[2]} \
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-o ${NAT_RULE[3]} -j ACCEPT
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$IPTABLES -A FORWARD -p icmp --icmp-type fragmentation-needed -i ${NAT_RULE[1]} -s ${NAT_RULE[2]} \
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-o ${NAT_RULE[3]} -j ACCEPT
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FWDIF_EXISTS="${FWDIF_EXISTS} ${NAT_RULE[1]}:${NAT_RULE[2]}:${NAT_RULE[3]}"
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fi
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$IPTABLES -A FORWARD -p icmp --icmp-type time-exceeded -i ${NAT_RULE[1]} -o ${NAT_RULE[3]} -j ACCEPT
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$IPTABLES -A FORWARD -p icmp --icmp-type fragmentation-needed -i ${NAT_RULE[1]} -o ${NAT_RULE[3]} -j ACCEPT
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;;
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MASQ)
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$IPTABLES -A POSTROUTING -t nat -s ${NAT_RULE[2]} -j MASQUERADE -o ${NAT_RULE[3]}
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display_c DEFAULT "\t${GREEN}MASQ:${PURPLE}${NAT_RULE[2]}${AQUA}->${BLUE}${NAT_RULE[3]}"
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if [[ ! "$INIF_EXISTS" =~ "${NAT_RULE[1]}" ]]; then
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$IPTABLES -A INPUT -p icmp --icmp-type time-exceeded -i ${NAT_RULE[1]} -j ACCEPT
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$IPTABLES -A INPUT -p icmp --icmp-type fragmentation-needed -i ${NAT_RULE[1]} -j ACCEPT
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INIF_EXISTS="${INIF_EXISTS} $i"
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if [[ ! "$INIF_EXISTS" =~ "${NAT_RULE[1]}:${NAT_RULE[2]}" ]]; then
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$IPTABLES -A INPUT -p icmp --icmp-type time-exceeded -i ${NAT_RULE[1]} \
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-s ${NAT_RULE[2]} -j ACCEPT
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$IPTABLES -A INPUT -p icmp --icmp-type fragmentation-needed -i ${NAT_RULE[1]} \
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-s ${NAT_RULE[2]} -j ACCEPT
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INIF_EXISTS="${INIF_EXISTS} ${NAT_RULE[1]}:${NAT_RULE[2]}"
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fi
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if [[ ! "$OUTIF_EXISTS" =~ "${NAT_RULE[3]}" ]]; then
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$IPTABLES -A OUTPUT -p icmp --icmp-type time-exceeded -o ${NAT_RULE[3]} -j ACCEPT
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$IPTABLES -A OUTPUT -p icmp --icmp-type fragmentation-needed -o ${NAT_RULE[3]} -j ACCEPT
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OUTIF_EXISTS="${OUTIF_EXISTS} $i"
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if [[ ! "$FWDIF_EXISTS" =~ "${NAT_RULE[1]}:${NAT_RULE[2]}:${NAT_RULE[3]}" ]]; then
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$IPTABLES -A FORWARD -p icmp --icmp-type time-exceeded -i ${NAT_RULE[1]} -s ${NAT_RULE[2]} \
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-o ${NAT_RULE[3]} -j ACCEPT
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$IPTABLES -A FORWARD -p icmp --icmp-type fragmentation-needed -i ${NAT_RULE[1]} -s ${NAT_RULE[2]} \
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-o ${NAT_RULE[3]} -j ACCEPT
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FWDIF_EXISTS="${FWDIF_EXISTS} ${NAT_RULE[1]}:${NAT_RULE[2]}:${NAT_RULE[3]}"
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fi
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$IPTABLES -A FORWARD -p icmp --icmp-type time-exceeded -i ${NAT_RULE[1]} -o ${NAT_RULE[3]} -j ACCEPT
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$IPTABLES -A FORWARD -p icmp --icmp-type fragmentation-needed -i ${NAT_RULE[1]} -o ${NAT_RULE[3]} -j ACCEPT
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;;
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NETMAP)
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$IPTABLES -A PREROUTING -t nat -s ${NAT_RULE[2]} -j NETMAP --to ${NAT_RULE[4]}
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display_c DEFAULT "\t${GREEN}NETMAP:${PURPLE}${NAT_RULE[2]}${AQUA}->${BLUE}${NAT_RULE[4]}"
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if [[ ! "$INIF_EXISTS" =~ "${NAT_RULE[1]}:${NAT_RULE[2]}" ]]; then
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$IPTABLES -A INPUT -p icmp --icmp-type time-exceeded -i ${NAT_RULE[1]} \
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-s ${NAT_RULE[2]} -j ACCEPT
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$IPTABLES -A INPUT -p icmp --icmp-type fragmentation-needed -i ${NAT_RULE[1]} \
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-s ${NAT_RULE[2]} -j ACCEPT
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INIF_EXISTS="${INIF_EXISTS} ${NAT_RULE[1]}:${NAT_RULE[2]}"
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fi
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if [[ ! "$FWDIF_EXISTS" =~ "${NAT_RULE[1]}:${NAT_RULE[2]}:${NAT_RULE[3]}" ]]; then
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$IPTABLES -A FORWARD -p icmp --icmp-type time-exceeded -i ${NAT_RULE[1]} -s ${NAT_RULE[2]} \
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-o ${NAT_RULE[3]} -j ACCEPT
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$IPTABLES -A FORWARD -p icmp --icmp-type fragmentation-needed -i ${NAT_RULE[1]} -s ${NAT_RULE[2]} \
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-o ${NAT_RULE[3]} -j ACCEPT
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FWDIF_EXISTS="${FWDIF_EXISTS} ${NAT_RULE[1]}:${NAT_RULE[2]}:${NAT_RULE[3]}"
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fi
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;;
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*) display_c RED "Invalid NAT rule in NAT_RANGE" ;;
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esac
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@ -80,7 +80,7 @@ DONTTRACK="127.0.0.1"
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# IP NAT Rules
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# SNAT:<INT IF>:<INT IP>:<EXT IF>:<EXT IP>
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# MASQ:<INT IF>:<INT IP>:<EXT IF>
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# NETMAP::<INT IP RANGE>::<EXT IP RANGE>
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# NETMAP:<INT IF>:<INT IP RANGE>:<EXT IF>:<EXT IP RANGE>
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#NAT_RANGE=""
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