Error code
Sophos All models code NC-1655
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Meaning
SSL VPN connections using Local authentication may experience re-authentication failures (based on Key lifetime) if static IP leases are configured on the firewall. The connection attempt fails specifically during the IP lease process, preventing successful VPN re-establishment. When a static IP is configured for an SSL VPN user, the access server incorrectly treats the already-leased IP address as a conflict during re-authentication. This forces users to manually re-enter their credentials to establish a new tunnel after the Key lifetime expires (default: 18000 seconds)
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Address of this page: https://www.remfixit.com/tr/sophos/tum-modeller/nc1655