# RealIP The module is used to change the client address and port to the ones sent in the PROXY protocol header. The PROXY protocol must be previously enabled by setting the `proxy_protocol` parameter in the [listen](https://en.angie.software//angie/docs/configuration/modules/mail/index.md#m-listen) directive. ## Configuration Example ```nginx listen 110 proxy_protocol; set_real_ip_from 192.168.1.0/24; set_real_ip_from 192.168.2.1; set_real_ip_from 2001:0db8::/32; ``` ## Directives ### set_real_ip_from | [Syntax](https://en.angie.software//angie/docs/configuration/configfile.md#configfile) | `set_real_ip_from` address | CIDR | `unix:`; | |------------------------------------------------------------------------------------------|------------------------------------------------| | Default | — | | [Context](https://en.angie.software//angie/docs/configuration/configfile.md#configfile) | mail, server | Defines trusted addresses that are known to send correct replacement addresses. If the special value `unix:` is specified, all UNIX domain sockets will be trusted.