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I am trying to grant a user the CAP_NET_ADMIN and CAP_NET_RAW capabilities on a Debian 11 system running the GNOME3 desktop environment. The user should receive the ability to use these capabilities upon logging in through the graphical login.

My /etc/security/capabilities.conf:

cap_net_admin,cap_net_raw       myuser
none                            *   

I have added the following to the top of gdm-launch-environment, gdm-password, and to the bottom of common-auth (as directed in man pam_cap) in /etc/pam.d with no luck:

auth    optional    pam_cap.so

The result:

myuser@host$ /sbin/capsh --print
Current: =
Bounding set =cap_chown,cap_dac_override,cap_dac_read_search,cap_fowner,cap_fsetid,cap_kill,cap_setgid,cap_setuid,cap_setpcap,cap_linux_immutable,cap_net_bind_service,cap_net_broadcast,cap_net_admin,cap_net_raw,cap_ipc_lock,cap_ipc_owner,cap_sys_module,cap_sys_rawio,cap_sys_chroot,cap_sys_ptrace,cap_sys_pacct,cap_sys_admin,cap_sys_boot,cap_sys_nice,cap_sys_resource,cap_sys_time,cap_sys_tty_config,cap_mknod,cap_lease,cap_audit_write,cap_audit_control,cap_setfcap,cap_mac_override,cap_mac_admin,cap_syslog,cap_wake_alarm,cap_block_suspend,cap_audit_read
Ambient set =

It works, however, if I add the line to the top of the pam su file and su to my user. I have done this setup successfully using LXDE by making a similar change, so I'm sure this is possible here as well.

How can I configure PAM to grant the capabilities when logging in through GDM?

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