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ProtocolCodes
11
DNS

11 DSOTYPENI

DSO-TYPE Not Implemented. The DNS Stateful Operations (DSO) type in the request is not supported by the server.

On this page

When You See This Code

Your client attempted a DSO operation (like a keepalive or push subscription) that the server does not recognize or has not implemented.

How to Fix

Verify that both client and server support the same DSO-TYPE. Upgrade the server software or fall back to traditional DNS queries.

Specification

View RFC / Specification →

Compare With

0 NOERROR 1 FORMERR 2 SERVFAIL 3 NXDOMAIN 4 NOTIMP 5 REFUSED 6 YXDOMAIN 7 YXRRSET 8 NXRRSET 9 NOTAUTH 10 NOTZONE 16 BADVERS/BADSIG

Guides

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DNS Propagation: Why Changes Take Time DNS & Networking
DNSSEC Implementation Guide DNS & Networking
DNS-Based Failover and High Availability DNS & Networking
DNS Record Types Explained: A, AAAA, CNAME, MX, TXT, and Beyond DNS & Networking
DNS over HTTPS (DoH) and DNS over TLS (DoT): Encrypted DNS Explained DNS & Networking
Essential Network Debugging Tools: ping, traceroute, mtr, and tcpdump DNS & Networking
Resource Hints: Preload, Prefetch, Preconnect, and DNS-Prefetch Performance & Optimization
RFC 9114: HTTP/3 Protocol Deep Dive Protocol Deep Dives
RFC 3261: SIP Protocol Deep Dive Protocol Deep Dives
QUIC Protocol: The Transport Layer Behind HTTP/3 Protocol Deep Dives
Migrating from TLS 1.2 to TLS 1.3: Configuration and Compatibility Migration & Upgrades
Secret Management for API Keys, Tokens, and Certificates Production Infrastructure

Glossary

TCP/IP Port Number Latency Timeout Firewall DNS over HTTPS (DoH) IPv6 Subnet (Subnetwork) MTU (Maximum Transmission Unit) UDP (User Datagram Protocol) DNS Lookup CDN (Content Delivery Network) Request-Response Model RFC (Request for Comments) IANA (Internet Assigned Numbers Authority) Wire Format Extension Mechanism Connectionless Text vs Binary Protocol DNS Resolution DNS Record Types TTL (Time to Live) DNSSEC (DNS Security Extensions) DNS over TLS (DoT) Anycast Recursive Resolver Authoritative Name Server Glue Record EDNS(0) DNS Zone DNS Propagation CNAME Record MX Record SRV Record PTR Record DNS Cache Poisoning DNS Root Server Split-Horizon DNS Wildcard DNS Record SPF, DKIM, and DMARC Email Deliverability MTA (Mail Transfer Agent) ARC (Authenticated Received Chain) BIMI (Brand Indicators for Message Identification) Service Discovery GSLB (Global Server Load Balancing) Failover Active-Passive HA

Frequently Asked Questions

What is DNS 11 DSOTYPENI?

DSO-TYPE Not Implemented. The DNS Stateful Operations (DSO) type in the request is not supported by the server.

When do you see DNS 11 DSOTYPENI?

Your client attempted a DSO operation (like a keepalive or push subscription) that the server does not recognize or has not implemented.

How to fix DNS 11 DSOTYPENI?

Verify that both client and server support the same DSO-TYPE. Upgrade the server software or fall back to traditional DNS queries.