- Virtual private networks require a high-bandwidth, low-latency network to function efficiently. Satellite Internet services, on the other hand, normally suffer very high latencies due to the long distance satellite signals must travel.
- Satellite Internet also tends to support low upstream bandwidth. Specifically, satellite bandwidth for uploads is comparable to that of dial-up Internet services. VPNs demand high bandwidth for both uploads and downloads.
Despite these limitations, it is technically possible to use most VPN solutions with most satellite Internet services. The following caveats apply:
1. Overall performance of a VPN connection over satellite will be poor. VPN over satellite often performs at the speed of a dial-up Internet connection.
2. Satellite providers generally do not offer technical support or service guarantees to VPN users.
3. Satellite providers commonly deploy a performance boosting technique called "IP spoofing" as part of their service. This IP spoofing interferes with the ability to establish VPN connections. For VPNs to work with satellite Internet, the provider must have some provision to bypass IP spoofing for VPN connections.
4. The same compatiblity issues between VPNs and personal firewalls, and VPNs and Internet connection sharing software, apply for satellite as with other types of Internet service.