Source note · SIP ALG problems on firewalls and routers
After changing FortiGate SIP handling, the tip says to clear existing SIP sessions (filter on destination port 5060 and clear) or reboot the unit.
Checked 2026-09-25
- Vendor
- Fortinet
- Product
- FortiGate (FortiOS)
- Subsystem
- session table
- Deployment
- on-premises
- Region
- not restricted
- Release range
- FortiOS 5.x era per 2015 tip; later releases unconfirmed
- Checked
- 2026-09-25
Sources
- Technical Tip: Disabling VoIP Inspection — Fortinet (Fortinet Community technical tip authored by Fortinet staff) · tier 2 current vendor documentation · Step 3 Clear Sessions or Reboot
Cite this note
APA
WarmTransfer. (2026, September 25). SIP ALG problems on firewalls and routers: source note sip-alg-problems-fortigate-clear-sessions. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-alg-problems-fortigate-clear-sessions
BibTeX
@misc{warmtransfer-claim-sip-alg-problems-fortigate-clear-sessions,
title = {SIP ALG problems on firewalls and routers: source note sip-alg-problems-fortigate-clear-sessions},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-alg-problems-fortigate-clear-sessions},
note = {Source note sip-alg-problems-fortigate-clear-sessions, checked 2026-09-25}
}