NetFilter SDK for Linux
NetFilter SDK is a framework for transparent filtering of data packets transmitted via network. It is suitable for developing content filters, basic application-level firewalls, traffic analyzers/shapers, and other software that requires viewing and modifying TCP traffic and controlling access for UDP and other IP packets.Key features:
- The solution allows filtering TCP connections and allowing/blocking UDP datagrams in user-mode applications. It is possible to filter a specified subset of connections/datagrams, as defined by filtering rules. The outgoing TCP connections can be redirected to a different address.
- On Linux the filtering uses iptables, on top of the TCP/IP stack. In effect, it automatically supports all kinds of TCP/IP capable network adapters: Ethernet, Dial-up/DSL/Cable modems, wireless adapters including Wi-Fi and Bluetooth, virtual adapters like loopback or VPN.
- The process context (as a process identifier) is available for TCP network activity.
- The API is easy to use, but powerful.
- It is possible to use the solution with ProtocolFilters to filter HTTP, SSL(TLS) and other high level protocols.
- On Linux it can be used on a router machine to filter the forwarded TCP traffic from all devices using the machine as a gateway.
System requirements:
Linux.