I asked Perplexity:
Using the same provider for both domain registration and DNS hosting can present several risks. Here are the primary risks and ways to mitigate or prevent them:

## Risks

1. *Single Point of Failure*:
- If the provider experiences an outage, both your domain registration and DNS services could be affected, leading to downtime for your website and email services[2].

2. *Security Vulnerabilities*:
- Using a single provider increases the risk of DNS hijacking, DNS cache poisoning, and other DNS attacks if the provider's security is compromised[3][4].

3. *Limited DNS Features*:
- Some domain registrars that offer DNS services may not provide advanced DNS features like DNSSEC, Anycast, or DDoS protection, which are crucial for security and performance[2][5].

4. *Vendor Lock-in*:
- It may be more challenging to transfer your domain or DNS services to another provider if both are managed by the same company, potentially leading to higher costs or service disruptions[1].

## Mitigation Strategies

1. *Use DNSSEC*:
- Implement DNSSEC (Domain Name System Security Extensions) to protect against DNS hijacking and cache poisoning. DNSSEC adds a layer of security by enabling DNS responses to be verified using digital signatures[3][4].

2. *Redundancy and Backup*:
- Use secondary DNS providers to ensure redundancy. This way, if your primary DNS provider experiences an outage, the secondary provider can handle DNS queries, minimizing downtime[2][5].

3. *Choose a Reputable Provider*:
- Select a provider that specializes in DNS services and offers robust security features, including DDoS mitigation, Anycast networks, and DNSSEC. This ensures that you are using the latest DNS technologies and security measures[2][7].

4. *Regular Security Audits*:
- Conduct regular security audits of your DNS configurations and keep your DNS software updated to protect against vulnerabilities and exploits[7].

5. *Enable Two-Factor Authentication (2FA)*:
- Use 2FA for accessing your domain and DNS management interfaces to prevent unauthorized access. Additionally, consider IP whitelisting to restrict access to trusted IP addresses only[3][5].

6. *Client Lock*:
- Utilize client lock features provided by your registrar to prevent unauthorized changes to your DNS records without approval from a specific individual within your organization[3][5].

By implementing these strategies, you can significantly reduce the risks associated with using the same provider for domain registration and DNS hosting, ensuring better security, reliability, and performance for your online services.

Sources
[1] Everything About Website Domain Registration : Best Practices And ... https://monsterhost.com/everything-about-website-domain-regi...
[2] Should you keep your DNS management and domain registration ... https://blog.dnsimple.com/2015/03/benefits-and-drawbacks-of-...
[3] What is DNS Hijacking and Mitigation Methods - GlobalDots https://www.globaldots.com/resources/blog/what-is-dns-hijack...
[4] DNS Attacks: Tutorial & Prevention Best Practices - Catchpoint https://www.catchpoint.com/dns-monitoring/dns-attack
[5] How to Prevent DNS Attacks: DNS Security Best Practices https://www.esecurityplanet.com/networks/how-to-prevent-dns-...
[6] Unraveling the roles of domain registrars and web hosting providers https://www.godaddy.com/resources/skills/roles-of-domain-reg...
[7] Top Five DNS Security Attack Risks and How to Avoid Them | Blog https://www.humanize.security/blog/cyber-awareness/top-five-...