Oracle Cloud - DNS in Virtual Cloud Network
- Created by: lisa_blanshard
- Created on: 03-11-19 15:08
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- DNS in Virtual Cloud Network
- Domain Name System
- Use hostnames instead of IP addresses
- DHCP Options associated with each subnet
- Use DHCP options to specify the DNS type for your subnet
- To change you need to restart DHCP client on instance or restart instance or change is picked up when DHCP client refreshes the lease (24 hours)
- Default is Internet and VCN Resolver
- Internet Resolver
- Lets instances resolve hostnames that are published on the internet
- No need to IGW or DRG
- Lets instances resolve hostnames that are published on the internet
- VCN Resolver
- Lets instances resolve hostnames within VCN
- Also does reverse lookup - gets hostname from private IP in VCN
- Internet Resolver
- On-Premise through DRG
- Internet and VCN resolver don't resolve on-premise hostnames
- Need Custom resolver
- Use DNS server of your choice (max 3)
- Available through internet
- Within VCN
- Within On-Premise network
- Use DNS server of your choice (max 3)
- You can specify DNS labels for your VCN and subnets
- Instance FQDN ...oraclevcn.com
- e.g. aosdb1.uat.bca.oraclevcn.com
- Hostname is assigned to primary VNIC
- FQDN resolves to private IP of instance
- You can add second VNIC with another hostname - resolves to private IP
- You can add second private IP address with another hostname - resolves to second IP
- Max 63 chars for instance name
- VCN and subnet labels max 15 alphanumeric, must start with a letter, hyphens/underscores not allowed
- Instance FQDN ...oraclevcn.com
- Untitled
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