unless im blind, R1 has no routes to any other subnet. so it will only know about 192.168.1.0/24
so even if anything comes back to R3 , R1 wouldn't know where to send back.
R2 doesn't actually need any routes in this situation since it knows both about R1 and R3
R3 routing table looks like it should work. ..
so either add a default route to R1 .. or add the correct route..
cheers.
We must go always forward, not backward
always up, not down and always twirling twirling towards infinity.