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firewall: provide examples of ssh port relocation on firewall and IPsec passthrough Two examples of potentially useful configurations (commented out, of course):

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(a) map the ssh service running on the firewall to 22001 externally, without modifying the configuration of the daemon itself. this allows port 22 on the WAN side to then be port-forwarded to a
LAN-based machine if desired, or if not, simply obscures the port from external attack.

(b) allow IPsec/ESP and ISAKMP (UDP-based key exchange) to happen by default. useful for most modern VPN clients you might have on your WAN.

Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>

SVN-Revision: 26805
This commit is contained in:
Jo-Philipp Wich 2011-05-02 12:54:31 +00:00
parent 8324bf036c
commit ad23dd94b6
2 changed files with 61 additions and 11 deletions
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22
package/firewall/files/firewall.config
View file

@ -75,6 +75,28 @@ config include
# option dest_port 80
# option proto tcp
# port redirect of remapped ssh port (22001) on wan
#config redirect
# option src wan
# option src_dport 22001
# option dest lan
# option dest_port 22
# option proto tcp
# allow IPsec/ESP and ISAKMP passthrough
#config rule
# option src wan
# option dest lan
# option protocol esp
# option target ACCEPT
#config rule
# option src wan
# option dest lan
# option src_port 500
# option dest_port 500
# option proto udp
# option target ACCEPT
### FULL CONFIG SECTIONS
#config rule

50
package/firewall/files/lib/core_interface.sh
View file

@ -1,27 +1,55 @@
# Copyright (C) 2009-2010 OpenWrt.org
# Copyright (C) 2009-2011 OpenWrt.org
fw__uci_state_add() {
local var="$1"
local item="$2"
local val=" $(uci_get_state firewall core $var) "
val="${val// $item / }"
val="${val# }"
val="${val% }"
local list="$(uci_get_state firewall core $var)"
list=" ${list:+$list }"
for item in $item; do
case "$list" in
"* $item *") continue;;
*) list="$list$item ";;
esac
done
list="${list% }"
list="${list# }"
uci_revert_state firewall core $var
uci_set_state firewall core $var "${val:+$val }$item"
uci_set_state firewall core $var "$list"
}
fw__uci_state_del() {
local var="$1"
local item="$2"
local val=" $(uci_get_state firewall core $var) "
val="${val// $item / }"
val="${val# }"
val="${val% }"
echo "del[$item]"
local list val
for val in $(uci_get_state firewall core "$var" | sort -u); do
list="${list:+$list }$val"
done
echo "list[$list]"
uci_revert_state firewall core $var
uci_set_state firewall core $var "$val"
[ -n "$list" ] && {
list=" $list "
for item in $item; do
list="${list// $item / }"
done
list="${list# }"
list="${list% }"
echo "list2[$list]"
uci_set_state firewall core $var "$list"
}
}
fw_configure_interface() {