# V2Ray Integration
- How does V2Ray integrate with Trojan / SSR / etc.
# What is V2Ray Integration
Qv2ray has its special feature, to integrate plugin kernels (SSR / Trojan) with V2Ray Core.
Many kernels do not have built-in routing engine, (e.g SSR), they depend on the PAC feature. Qv2ray is now breaking this dependency, where users do not need a PAC file, but V2Ray-Core to replace the PAC.
# Why not PAC?
PAC feature has been marked as deprecated by Qv2ray development group. We do not suggest our users to use, below are the reasons:
- PAC relies on an existing rule, which can be generated by
GFWListor some other domain lists.
- Editing an PAC file locally is difficult, and error-prone, a single typo/syntax error will make the whole PAC file in trouble.
- V2Ray has its own routing table implementations and
geositedata is generated from the official providers, they update the list frequently
- Using of V2Ray Integration is easier than setting up PAC.
# How V2Ray Integration works
There are several steps:
- Qv2ray detected an/some outbound config(s) is/are for one/some plugin kernels.
- Qv2ray will allocate port, for HTTP inbound and SOCKS inbound (any if enabled) for each kernel.
- Qv2ray will replace the kernel plugin outbound to HTTP/SOCKS outbound(s), each corresponded to a specific plugin with appropriate inbound protocol.
- New routing table entries will be added to V2ray config file, to route HTTP inbound to the plugin HTTP inbound, and the same with SOCKS
- Qv2ray will start all kernel plugins used in this connection config. Then start V2Ray.
- Qv2ray will collect stats data from V2Ray, instead of getting them from individual plugins.
# Benefit from V2Ray Integration
- Bypass CN domains and IP addresses.
- Bypass Local Area Network Addresses.
- Qv2ray's advanced routing matrix settings.
- Custom DNS settings.