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draft-kwatsen-netconf-zerotouch-00

draft-kwatsen-netconf-zerotouch-00. Zero Touch Provisioning for NETCONF Call Home. Introduction.

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draft-kwatsen-netconf-zerotouch-00

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  1. draft-kwatsen-netconf-zerotouch-00 Zero Touch Provisioning for NETCONF Call Home

  2. Introduction Zero Touch is a strategy for how to establish a secure network management relationship between a newly delivered network element, configured with just its factory default settings, and the new owner's NMS.

  3. Goals Security • MUSTimplementvs MUST use(RFC 3365) Flexibility • Works on SP networks, even if behind a firewall Ease of Use • Play-n-play for Installer (“zero” means zero!) Device Cost • Mild (COGS + development effort)

  4. Proposal illustrated in following slides

  5. Device State Precondition +--------------------------------+ | <device> | | | | +----------------------+ | | | <crypto processor> | | | | | | | | device private key | | | | device certificate | | | +----------------------+ | | | | FQDN of vendor's DNS server | +--------------------------------+ Serial Number Signed by certificate with chain of trust to Vendor’s well-known CA

  6. Vendor's DNS Server State +-------------------------------------------------+ | <vendor's DNS server> | | | | <sha1-of-device-public-key>.<vendor-zone> | | - FQDN of NMS to connect to | | - flag indicating if SSH or TLS | | - username NMS will login using | | - NMS's auth credentials | | | +-------------------------------------------------+ • State initialized through a vendor-hosted interface

  7. ZeroTouch Sequence Diagram DEVICE LOCAL DHCP LOCAL DNS VENDOR'S DNS NMS | SERVER SERVER SERVER (DNSSEC) | | | | | | |------------>| | | | | Lease IP | | | | | | | | | |------------------------------->| | | | Lookup vendor's DNS server | | | | | | | | |---------------------------------------------->| | | Lookup <sha1-of-device-pub-key>.<vendor-zone> | | | | | | | |------------------------------->| | | | Lookup NMS IP address | | | | | | | | |------------------------------------------------------------->| | Reverse SSH or Reverse TLS | | | | | | | |

  8. NMS State Precondition +----------------------------------------+ | <NMS> | | | | vendor's trusted CA certificate | | serial numbers for expected devices | | username to log into devices with | | auth credentials to log into devices | | | +----------------------------------------+ • NMS needs CA cert and serial-numbers from Vendor

  9. Supporting Private Networks • Potential alternatives to source information: • Impersonate vendor’s DNS server • DHCP (susceptible to a MITM attack?) • USB flash drive • Near-field wireless • Or just to avoid doing a lookup in the vendor’s DNS server?

  10. Security Considerations • Long-lived certificates • Vendor may reveal NMS locations • Serial Number in certificate

  11. IANA Considerations • None

  12. Open Issues • DNSSEC doesn't currently allow client certificates • Should DNS record provide SSH-specific information? • Standardize REST API used to set DNS record info? Not in -00 draft: • Use something besides DNS? (e.g. HTTPS)

  13. Questions / Concerns ?

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