I have several CentOS instances on Amazon's AWS/EC2.
The instances are able to ping each other, but not SNMP or traceroute among themselves.
- I stopped iptables on all machines.
- Each instance is able to traceroute and talk SNMP to itself.
- Addresses of two of the machines: 10.152.143.130 10.211.155.240
Can you suggest where the problem may lie?