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AWS blocked ICMP by default though and cause a lot of traceroute problem for me...
by kureikain 5y ago
AWS blocked ICMP by default though and cause a lot of traceroute problem for me...
- est31 5y ago> If the maximum transmission unit (MTU) between hosts in your subnets is different, or your instances communicate with peers over the internet, you must add the following network ACL rule, both inbound and outbound. https://docs.aws.amazon.com/vpc/latest/userguide/vpc-network-acls.html#path_mtu_discovery https://docs.aws.amazon.com/vpc/latest/userguide/vpc-network... If your instances communicate with peers over the internet. So by default, AWS was built to assume your instances do not communicate over the internet, lol.