I have 2 VM in KVM, and 2 network default and new
1 use defaut network:(virbr0)
192.168.122.0/24
IP: 192.168.122.152.
fowarding: NAT
the other use new network:(virbr1)
192.168.124.0/24
IP: 192.168.124.182
fowarding: NAT
Both have empty iptables rule and ufw inactive
From both VM I can ping to the host and the internet, also host can ping to VM too.
quanlm@quanlm-laptop:/home/quan$ ping 192.168.122.152
PING 192.168.122.152 (192.168.122.152) 56(84) bytes of data.
64 bytes from 192.168.122.152: icmp_seq=1 ttl=64 time=0.596 ms
quanlm@quanlm-laptop:/home/quan$ ping 192.168.124.182
PING 192.168.124.182 (192.168.124.182) 56(84) bytes of data.
64 bytes from 192.168.124.182: icmp_seq=1 ttl=64 time=0.509 ms
But in the VM use defaut network, I can ping the new network
root@test:~# ping 192.168.124.1
PING 192.168.124.1 (192.168.124.1) 56(84) bytes of data.
64 bytes from 192.168.124.1: icmp_seq=1 ttl=64 time=0.165 ms
64 bytes from 192.168.124.1: icmp_seq=2 ttl=64 time=0.551 ms
but not the others VM using new network
root@test:~# ping 192.168.124.182
PING 192.168.124.182 (192.168.124.182) 56(84) bytes of data.
From 192.168.122.1 icmp_seq=1 Destination Port Unreachable
From 192.168.122.1 icmp_seq=2 Destination Port Unreachable
From 192.168.122.1 icmp_seq=3 Destination Port Unreachable
But also the VM using new network can ping directly the default network VM
root@test2:~# ping 192.168.122.152
PING 192.168.122.152 (192.168.122.152) 56(84) bytes of data.
64 bytes from 192.168.122.152: icmp_seq=1 ttl=63 time=1.30 ms
64 bytes from 192.168.122.152: icmp_seq=2 ttl=63 time=1.10 ms
Trace route on default VM
root@test:~# traceroute 192.168.124.182
traceroute to 192.168.124.182 (192.168.124.182), 30 hops max, 60 byte packets
1 quanlm-laptop (192.168.122.1) 0.565 ms 0.446 ms 0.440 ms
2 quanlm-laptop (192.168.122.1) 0.454 ms 0.551 ms 0.441 ms
Traceroute in new VM
root@test2:~# traceroute 192.168.122.152
traceroute to 192.168.122.152 (192.168.122.152), 30 hops max, 60 byte packets
1 quanlm-laptop (192.168.124.1) 0.459 ms 0.455 ms 0.453 ms
2 test.192.168.124.1 (192.168.122.152) 1.234 ms 1.383 ms 1.782 ms
Host route:
quanlm@quanlm-laptop:/home/quan$ route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default _gateway 0.0.0.0 UG 600 0 0 wlo1
link-local 0.0.0.0 255.255.0.0 U 1000 0 0 wlo1
172.16.161.0 0.0.0.0 255.255.255.0 U 0 0 0 vmnet1
192.168.48.0 0.0.0.0 255.255.255.0 U 0 0 0 vmnet8
192.168.64.0 0.0.0.0 255.255.240.0 U 600 0 0 wlo1
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0
192.168.124.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr1
The question is how to make 1st VM default can ping to 2nd VM new?
