Two examples of potentially useful configurations (commented out, of course):
(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>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@26805 3c298f89-4303-0410-b956-a3cf2f4a3e73
Allow a redirect like:
config redirect
option src 'wan'
option dest 'lan'
option src_dport '22001'
option dest_port '22'
option proto 'tcp'
note the absence of the "dest_ip" field, meaning to terminate the connection on the firewall itself.
This patch makes three changes:
(1) moves the conntrack module into the conntrack package (but not any of the conntrack_* helpers).
(2) fixes a bug where the wrong table is used when the "dest_ip" field is absent.
(3) accepts incoming connections on the destination port on the input_ZONE table, but only for DNATted
connections.
In the above example,
ssh -p 22 root@myrouter
would fail from the outside, but:
ssh -p 22001 root@myrouter
would succeed. This is handy if:
(1) you want to avoid ssh probes on your router, or
(2) you want to redirect incoming connections on port 22 to some machine inside your firewall, but
still want to allow firewall access from outside.
Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@26617 3c298f89-4303-0410-b956-a3cf2f4a3e73
- support negations for src_ip, dest_ip, src_dip options in rules and redirects
- add NOTRACK target to rule sections, allows to define fine grained notrack rules
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@23141 3c298f89-4303-0410-b956-a3cf2f4a3e73
- simplify masquerade rule setup
- remove various subshell invocations
- speedup fw() by not relying on xargs and pipes
- rework SNAT support - attach to dest zone, use src_dip/src_dport as snat source
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@23024 3c298f89-4303-0410-b956-a3cf2f4a3e73
- fix possible endless loop when the family option is used for forwardings
- only generate forwarding rules in SNAT redirect sections if src_dip is specified
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@22938 3c298f89-4303-0410-b956-a3cf2f4a3e73
- handle NAT reflection in firewall hotplug, solves synchronizing issues on boot
- introduce masq_src and masq_dest options to limit zone masq to specific ip ranges, supports multiple subnets and negation
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@22888 3c298f89-4303-0410-b956-a3cf2f4a3e73
- fix processing of rules with an ip family option
- append interface rules at the end of internal zone chains, simplifies injecting user or addon rules
- support simple file logging (option log + option log_limit per zone)
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@22847 3c298f89-4303-0410-b956-a3cf2f4a3e73
- notrack support was broken in multiple ways, fix it
- also consider a zone conntracked if any redirect references it (#7196)
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@22215 3c298f89-4303-0410-b956-a3cf2f4a3e73
- support alias ifnames different from parent ifname
- properly handle multiple subnets per alias (v4+v6)
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@21656 3c298f89-4303-0410-b956-a3cf2f4a3e73
- fix ip6tables rules when icmp_type option is set
- add "family" option to zones, forwardings, redirects and rules to selectively apply rules to iptables and/or ip6tables
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@21508 3c298f89-4303-0410-b956-a3cf2f4a3e73
- partially revert r21486, start firewall on init again
- skip iface hotplug events if base fw is not up yet
- get ifname and up state with uci_get_state() in iface setup
since the values gathered by scan_interfaces() may be outdated
when iface coldplugging happens (observed with pptp)
- ignore up state when bringing down interfaces because ifdown
reverts state vars before dispatching the iface event
- bump package revision
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@21502 3c298f89-4303-0410-b956-a3cf2f4a3e73
- defer firewall start until the first interface is brought up by hotplug, fixes race conditions on slow devices
- create a file lock during firewall start and wait for it in hotplug events, prevents race conditions between start and addif
- start firewall actions in background from hotplug handler since the firewall itself fires further hotplug events which results in a deadlock if not forked off
- get loaded state direcly from the uci binary since updated value is not recognized by config_get after uci_set_state
- bump package revision to r2
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@21486 3c298f89-4303-0410-b956-a3cf2f4a3e73
