The Kamailio registrar supports GRUU (RFC 5627), with public GRUUs built from the +sip.instance value, and SIP Outbound (RFC 5626), controlled by an outbound mode parameter with values 0 to 2.

Checked 2026-09-24

Vendor
Kamailio project
Product
Kamailio
Subsystem
registrar
Deployment
self-hosted
Region
not restricted
Release range
6.1.x
Checked
2026-09-24

Sources

Cite this note

APA

WarmTransfer. (2026, September 24). Kamailio and OpenSIPS SIP proxies: source note kamailio-sip-proxy-registrar-gruu-outbound. WarmTransfer. https://warmtransfer.net/knowledge/claims/kamailio-sip-proxy-registrar-gruu-outbound

BibTeX

@misc{warmtransfer-claim-kamailio-sip-proxy-registrar-gruu-outbound,
  title  = {Kamailio and OpenSIPS SIP proxies: source note kamailio-sip-proxy-registrar-gruu-outbound},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/kamailio-sip-proxy-registrar-gruu-outbound},
  note   = {Source note kamailio-sip-proxy-registrar-gruu-outbound, checked 2026-09-24}
}

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