Source note · DNS SRV and service discovery for SIP
Microsoft instructs administrators to allow Direct Routing signaling to and from all Microsoft Teams IP ranges, not only the addresses returned by DNS queries.
Checked 2026-09-24
Configure your firewall to allow signaling traffic to and from all Microsoft Teams IP ranges, not only the addresses returned from DNS queries.
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- SIP signaling
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Checked
- 2026-09-24
Sources
- Plan Direct Routing — Microsoft (Microsoft Learn) · tier 2 current vendor documentation · SIP signaling: FQDNs, Important note
Cite this note
APA
WarmTransfer. (2026, September 24). DNS SRV and service discovery for SIP: source note dns-srv-voice-msdr-firewall-not-dns. WarmTransfer. https://warmtransfer.net/knowledge/claims/dns-srv-voice-msdr-firewall-not-dns
BibTeX
@misc{warmtransfer-claim-dns-srv-voice-msdr-firewall-not-dns,
title = {DNS SRV and service discovery for SIP: source note dns-srv-voice-msdr-firewall-not-dns},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/dns-srv-voice-msdr-firewall-not-dns},
note = {Source note dns-srv-voice-msdr-firewall-not-dns, checked 2026-09-24}
}