brielle/SRFirewall
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bbruns@gmail.com 2014-04-05 22:56:00 +00:00
parent d853f28cdf
commit a4640001b7
3 changed files with 24 additions and 0 deletions
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10
etc/ipv4.conf
View File

@ -24,6 +24,15 @@ EnableTrustedv4Hosts="yes"
# Values: no | yes (default) # Values: no | yes (default)
Enablev4MSSClamp="yes" Enablev4MSSClamp="yes"
# Enable connection tracking features of netfilter/iptables
# conntracking allows the firewall to be smart about what
# packets it allows and refuses. On highly loaded systems or
# ones with low memory, this may be desirable. Everyone else
# should probably leave this on.
# Depended on by: Enablev4NAT
# Values: no | yes (default)
Enablev4ConnectionTracking="yes"
# Use /etc/resolv.conf as source for DNS servers that we communicate # Use /etc/resolv.conf as source for DNS servers that we communicate
# with as a client. If you turn this off (recommended if on static IP), # with as a client. If you turn this off (recommended if on static IP),
# then you will need to manually define the DNS servers you use. # then you will need to manually define the DNS servers you use.
@ -62,5 +71,6 @@ Enablev4Forwarding="yes"
# Enable IPv4 NAT/NETMAP rules # Enable IPv4 NAT/NETMAP rules
# This allows you to set up NAT rules, SNAT, MASQ, and NETMAP # This allows you to set up NAT rules, SNAT, MASQ, and NETMAP
# Config file: ipv4/nat.conf # Config file: ipv4/nat.conf
# Requires: Enablev4ConnectionTracking="yes"
# Values: no | yes (default) # Values: no | yes (default)
Enablev4NAT="yes" Enablev4NAT="yes"

10
etc/ipv6.conf
View File

@ -24,6 +24,15 @@ EnableTrustedv6Hosts="yes"
# Values: no | yes (default) # Values: no | yes (default)
Enablev6MSSClamp="yes" Enablev6MSSClamp="yes"
# Enable connection tracking features of netfilter/iptables
# conntracking allows the firewall to be smart about what
# packets it allows and refuses. On highly loaded systems or
# ones with low memory, this may be desirable. Everyone else
# should probably leave this on.
# Depended on by: Enablev6NAT
# Values: no | yes (default)
Enablev6ConnectionTracking="yes"
# Use /etc/resolv.conf as source for DNS servers that we communicate # Use /etc/resolv.conf as source for DNS servers that we communicate
# with as a client. If you turn this off (recommended if on static IP), # with as a client. If you turn this off (recommended if on static IP),
# then you will need to manually define the DNS servers you use. # then you will need to manually define the DNS servers you use.
@ -62,5 +71,6 @@ Enablev6Forwarding="yes"
# Enable IPv6 NAT/NETMAP rules # Enable IPv6 NAT/NETMAP rules
# This allows you to set up NAT rules, SNAT, MASQ, and NETMAP # This allows you to set up NAT rules, SNAT, MASQ, and NETMAP
# Config file: ipv4/nat.conf # Config file: ipv4/nat.conf
# Requires: Enablev6ConnectionTracking="yes"
# Values: no | yes (default) # Values: no | yes (default)
Enablev6NAT="yes" Enablev6NAT="yes"

4
lib/iptables.inc
View File

@ -372,6 +372,9 @@ function enable_nat {
IPVER="4" ;; IPVER="4" ;;
esac esac
${debug} ${DebugColor} "${FUNCNAME}:${DEFAULT_COLOR} loading" ${debug} ${DebugColor} "${FUNCNAME}:${DEFAULT_COLOR} loading"
([[ ${IPVER} == "4" ]] && [[ ${Enablev4ConnectionTracking} != "yes" ]]) && ${display} RED "${FUNCNAME}: ERROR:${DEFAULT_COLOR} Unable to load NAT rules if Enablev4ConnectionTracking=no" && return 1
([[ ${IPVER} == "6" ]] && [[ ${Enablev6ConnectionTracking} != "yes" ]]) && ${display} RED "${FUNCNAME}: ERROR:${DEFAULT_COLOR} Unable to load NAT rules if Enablev6ConnectionTracking=no" && return 1
if [ -e "${FWCONFIGDIR}/ipv${IPVER}/nat.conf" ]; then if [ -e "${FWCONFIGDIR}/ipv${IPVER}/nat.conf" ]; then
${debug} ${DebugColor} "${FUNCNAME}:${DEFAULT_COLOR} read ${FWCONFIGDIR}/ipv${IPVER}/nat.conf successful" ${debug} ${DebugColor} "${FUNCNAME}:${DEFAULT_COLOR} read ${FWCONFIGDIR}/ipv${IPVER}/nat.conf successful"
while read -r type srcinterface srcaddress dstinterface dstaddress; do while read -r type srcinterface srcaddress dstinterface dstaddress; do
@ -411,4 +414,5 @@ function enable_nat {
done < "${FWCONFIGDIR}/ipv${IPVER}/nat.conf" done < "${FWCONFIGDIR}/ipv${IPVER}/nat.conf"
${debug} ${DebugColor} "${FUNCNAME}:${DEFAULT_COLOR} done" ${debug} ${DebugColor} "${FUNCNAME}:${DEFAULT_COLOR} done"
fi fi
} }