I know asymmetric is wrong and I do not want to use it. But on the other hand I have Linux server having multiple interfaces (prod, backup, interconnect) and I want to monitor them all - via ping for example.But I can not make our monitoring SW to have interface in every VLAN. So the source IP for the ping packet is only one, and monitoring works only for the prod server's interface.AFAIK: Windows 2012 has feature, can bypass this limitation, but I can not find any reasonable solution for Linux. For example I would like to avoid something like double NAT for ping packets entering and leaving backup VLAN.
How to bypass route path filtering (for ping)?
linux;routing;monitoring