Required Firewall Permissions

Gateway Solver is an internet-enabled product which will require access past your corporate firewall to work as intended. It requires TLS support.

Please ensure the following destinations are accessible:

Domain	Firewall Rule
*.evolvedsoftware.com	Port 80, 443 (TCP)
*.transaction-engine.tax.service.gov.uk	Port 80, 443 (TCP)
secure.gateway.gov.uk	Port 80, 443 (TCP)
secure.dev.gateway.gov.uk	Port 80, 443 (TCP)

Microsoft Forefront Threat Management Gateway (was ISA Server)

Gateway Solver can work with your HTTP proxy. If you are using (currently discontinued) Microsoft Forefront Threat Management Gateway, please select 'Authenticate with Microsoft ISA Server'.

Specify the local IP address of the server in the "Use HTTP Proxy Server" text box, and port (in x.x.x.x:port format) and check the 'Authenticate with Microsoft ISA Server' checkbox from within "Options & Settings".