- What is TTL?
- How is TTL relevant to Silverline DDoS Protection?
- Silverline DDoS Proxy
- Silverline WAF
- TTL = Time To Live.
- TTL is a setting in the DNS Record for a domain.
- TTL is the period of time a record should be stored locally on the client computer before an updated entry has to be retrieved directly from the DNS server again
- TTL is set by an authoritative nameserver
- TTL is used for caching purposes
- The longer the TTL value, the longer the information will be cached
- The longer the TTL value, the less queries a client will make in order to find the domain resolution
How TTL relates to Silverline DDoS Protection
- When switching your DNS record to point to Silverline, the change does not take effect until the DNS TTL expires.
- In DDoS situations, DNS changes are sometimes necessary.
- The shorter the TTL, the quicker changes take effect.
- Therefore, at the beginning of any DDoS event, the customer should set their DNS TTL as low as possible: 5min if possible, 30min is common.
- How to Set up DNS for use with Silverline WAF
- Proxy Set-up Guide: How to Configure Your On-Premises Setup
- How to Protect Your On-Prem Proxy with ACLs at the Carrier