#20163: CC 15.05-rc3: packets sent out on a second (wired) WAN are being dropped
somewhere in OpenWRT
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Reporter: braveheart_leo@… | Owner: developers
Type: defect | Status: closed
Priority: high | Milestone: Chaos Calmer (trunk)
Component: other | Version: Trunk
Resolution: worksforme | Keywords:
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Comment (by anonymous):
instead of setting rp_filter to 0 try setting it to 2
quotes from
https://access.redhat.com/solutions/53031
0 - No source validation.
1 - Strict mode as defined in RFC3704 Strict Reverse Path
Each incoming packet is tested against the FIB and if the
interface
is not the best reverse path the packet check will fail.
By default failed packets are discarded.
2 - Loose mode as defined in RFC3704 Loose Reverse Path
Each incoming packet's source address is also tested against
the FIB
and if the source address is not reachable via any interface
the packet check will fail.
Current recommended practice in RFC3704 is to enable strict mode
to prevent IP spoofing from DDos attacks. If using asymmetric
routing
or other complicated routing, then loose mode is recommended.
/quotes
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Ticket URL: <https://dev.openwrt.org/ticket/20163#comment:5>
OpenWrt <http://openwrt.org>
Opensource Wireless Router Technology
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