IPsec VPN & Connectivity
Practical help articles for common problems.
IPsec VPN & Connectivity
FortiGate IPsec VPN tunnel down
Review peer reachability, phase negotiation logs, shared parameters, and approved network changes.
Read guide →IPsec VPN & ConnectivityFortiGate IPsec phase one negotiation failed
Compare configured peers, authentication, proposals, and IKE versions on both ends.
Read guide →IPsec VPN & ConnectivityFortiGate IPsec phase two negotiation failed
Compare selectors, proposals, and relevant routes without exposing shared secrets.
Read guide →IPsec VPN & ConnectivityFortiGate site to site VPN no traffic
Check routing, policies, selectors, and counters on both tunnel endpoints.
Read guide →IPsec VPN & ConnectivityFortiGate VPN slow performance
Compare link latency, packet loss, encryption load, and tunnel MTU.
Read guide →IPsec VPN & ConnectivityFortiGate VPN DNS issues
Review DNS assignment, split DNS, client routes, and hostname resolution.
Read guide →IPsec VPN & ConnectivityFortiGate SD WAN failover not working
Inspect health checks, member status, service rules, and route selection.
Read guide →IPsec VPN & ConnectivityFortiGate routing loop troubleshooting
Review route tables, policy routes, dynamic routing neighbors, and recent changes.
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