..you will need to disable rp_filter on the inbound interface. rp_filter has been enabled by default since Ubuntu 12.04, so even if it worked in earlier versions, you’ll need this setting.
You can add an “ip_rp_filter 0” line to the relevant interface in /etc/network/interfaces, and you’re golden.
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The default behavior in RHEL6+ also changed. https://www.redhat.com/archives/rhelv6-list/2011-January/msg00080.html
Hi,
Would it not be better to set it to 2 instead of turning it off?
Regards,
Rik
Possibly. It’s not entirely clear to me in what situations setting it to 2 would suffice and when I need to disable it entirely.
I should have pointed out that you should try with 2 first, and if that failed, go all the way to 0.