I am able to ping google from the rancher VMs, but it shows

ping <http://google.com|google.com>
PING <http://google.com|google.com> (142.250.189.238) 56(84) bytes of data.
From 172.16.1.2 (172.16.1.2) icmp_seq=1 Redirect Host(New nexthop: 1.156.255.10 (1.156.255.10))

sounds like you got some messed up networking