Palo Alto Networks firewalls reassemble fragmented traffic for content inspection only and then forward it fragmented according to the egress interface MTU.
Checked 2026-10-02
Reassembly is performed strictly for inspection of content, not for traffic forwarding.
- Vendor
- Palo Alto Networks
- Product
- PAN-OS
- Subsystem
- fragment handling
- Deployment
- on-premises
- Region
- not restricted
- Release range
- versions not stated; article modified 2024-11-20
- Checked
- 2026-10-02
Sources
- How does the Palo Alto Networks Firewall Manage Fragmented Traffic? — Palo Alto Networks · tier 2 current vendor documentation · Resolution section
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting failed calls caused by large SIP messages over UDP: source note sip-fragmentation-troubleshooting-panos-reassemble-inspect. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-fragmentation-troubleshooting-panos-reassemble-inspect
BibTeX
@misc{warmtransfer-claim-sip-fragmentation-troubleshooting-panos-reassemble-inspect,
title = {Troubleshooting failed calls caused by large SIP messages over UDP: source note sip-fragmentation-troubleshooting-panos-reassemble-inspect},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-fragmentation-troubleshooting-panos-reassemble-inspect},
note = {Source note sip-fragmentation-troubleshooting-panos-reassemble-inspect, checked 2026-10-02}
}