nss-resolve(category14-security-amp-firewalls.html) - phpMan

NSS-RESOLVE(8)                    nss-resolve                   NSS-RESOLVE(8)
NAME
       nss-resolve, libnss_resolve.so.2 - Provide hostname resolution via
       systemd-resolved.service
SYNOPSIS
       libnss_resolve.so.2
DESCRIPTION
       nss-resolve is a plug-in module for the GNU Name Service Switch (NSS)
       functionality of the GNU C Library (glibc) enabling it to resolve host
       names via the systemd-resolved(8) local network name resolution
       service. It replaces the nss-dns plug-in module that traditionally
       resolves hostnames via DNS.
       To activate the NSS module, add "resolve" to the line starting with
       "hosts:" in /etc/nsswitch.conf. Specifically, it is recommended to
       place "resolve" early in /etc/nsswitch.conf's "hosts:" line (but after
       the "files" or "mymachines" entries), right before the "dns" entry if
       it exists, followed by "[!UNAVAIL=return]", to ensure DNS queries are
       always routed via systemd-resolved(8) if it is running, but are routed
       to nss-dns if this service is not available.
       Note that systemd-resolved will synthesize DNS resource records in a
       few cases, for example for "localhost" and the current hostname, see
       systemd-resolved(8) for the full list. This duplicates the
       functionality of nss-myhostname(8), but it is still recommended (see
       examples below) to keep nss-myhostname configured in
       /etc/nsswitch.conf, to keep those names resolveable if systemd-resolved
       is not running.
EXAMPLE
       Here is an example /etc/nsswitch.conf file that enables nss-resolve
       correctly:
           passwd:         compat mymachines systemd
           group:          compat mymachines systemd
           shadow:         compat
           hosts:          files mymachines resolve [!UNAVAIL=return] dns myhostname
           networks:       files
           protocols:      db files
           services:       db files
           ethers:         db files
           rpc:            db files
           netgroup:       nis
SEE ALSO
       systemd(1), systemd-resolved(8), nss-systemd(8), nss-myhostname(8),
       nss-mymachines(8), nsswitch.conf(5)
systemd 239                                                     NSS-RESOLVE(8)