# Use an outgoing proxy

For some protocols, LemonLDAP::NG has to directly contact the external server. This is the case for example with CAS authentication (validation of service ticket) or OpenID Connect authentication (access to token endpoint and userinfo endpoint).

If the LL::NG server needs a proxy for outgoing connections, then you need to configure some environment variables. By default, only connections to external systems (CAS, OIDC, etc.) are done through the proxy, while HTTP connections in between LemonLDAP::NG components are not.

## Apache

In Apache configuration, set:

    FcgidInitialEnv http_proxy http://X.X.X.X:X
    FcgidInitialEnv https_proxy http://X.X.X.X:X
    # on Centos7, you need LWP::Protocol::connect
    # FcgidInitialEnv https_proxy connect://X.X.X.X:X

    # Optional: use this to force ALL http connections to go
    # through the proxy. This is only useful in some scenarios
    # FcgidInitialEnv PERL_LWP_ENV_PROXY 1
    # FcgidInitialEnv no_proxy <urls-without-proxy>

## Nginx/FastCGI

add in `/etc/default/lemonldap-ng-fastcgi-server` :

    http_proxy=http://X.X.X.X:X
    https_proxy=http://X.X.X.X:X
    # on Centos7, you need LWP::Protocol::connect
    # https_proxy=connect://X.X.X.X:X

    # Optional: use this to force ALL http connections to go
    # through the proxy. This is only useful in some scenarios
    # PERL_LWP_ENV_PROXY=1
    # no_proxy=<urls-without-proxy>