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sonic-buildimage/files
Renuka Manavalan 6d7ecc426c [hostcfgd] -- Fix the default for failthrough as false.
This implies that by default, if TACACS is configured properly and it reported auth_err, then don't try fail through to traditional unix authentication through /etc/passwd.

If this failthrough is intended, make it explicit through "sudo config aaa authentication failthrough enable"

Removed an unused variable "aaa.fallback"

Tested manually. Note the presence of 'auth_err=die' in all cases except when failthrough is explicitly enabled.

admin@str-s6000-acs-13:~$ sudo config aaa authentication failthrough default; date
Wed Apr  3 23:05:18 UTC 2019
admin@str-s6000-acs-13:~$ ls -lrt /etc/pam.d/common-auth-sonic ; grep 123 /etc/pam.d/common-auth-sonic
-rw-r--r-- 1 root root 1316 Apr  3 23:05 /etc/pam.d/common-auth-sonic
auth    [success=done new_authtok_reqd=done default=ignore auth_err=die]        pam_tacplus.so server=100.127.20.22:49 secret=testing123 login=login timeout=5 try_first_pass
auth    [success=done new_authtok_reqd=done default=ignore auth_err=die]        pam_tacplus.so server=100.127.20.21:49 secret=testing123 login=login timeout=5 try_first_pass

admin@str-s6000-acs-13:~$ sudo config aaa authentication failthrough enable; date ; h4 "AAA|authentication"
Wed Apr  3 23:06:37 UTC 2019
admin@str-s6000-acs-13:~$ ls -lrt /etc/pam.d/common-auth-sonic ; grep 123 /etc/pam.d/common-auth-sonic
-rw-r--r-- 1 root root 1294 Apr  3 23:06 /etc/pam.d/common-auth-sonic
auth    [success=done new_authtok_reqd=done default=ignore]     pam_tacplus.so server=100.127.20.22:49 secret=testing123 login=login timeout=5 try_first_pass
auth    [success=done new_authtok_reqd=done default=ignore]     pam_tacplus.so server=100.127.20.21:49 secret=testing123 login=login timeout=5 try_first_pass

admin@str-s6000-acs-13:~$ sudo config aaa authentication failthrough disable; date ; h4 "AAA|authentication"
Wed Apr  3 23:07:09 UTC 2019
admin@str-s6000-acs-13:~$ ls -lrt /etc/pam.d/common-auth-sonic ; grep 123 /etc/pam.d/common-auth-sonic
-rw-r--r-- 1 root root 1321 Apr  3 23:07 /etc/pam.d/common-auth-sonic
auth    [success=done new_authtok_reqd=done default=ignore auth_err=die]        pam_tacplus.so server=100.127.20.22:49 secret=testing123 login=login timeout=5 try_first_pass
auth    [success=done new_authtok_reqd=done default=ignore auth_err=die]        pam_tacplus.so server=100.127.20.21:49 secret=testing123 login=login timeout=5 try_first_pass
2019-04-03 23:16:56 +00:00
..
Aboot [devices]: Add device data for Arista 7060PX/DX4-32 (#2534) 2019-02-08 22:02:01 -08:00
apt [baseimage]: Download picocom version 3.1-2 from stretch-backports; No longer build from source (#1946) 2018-08-17 17:38:20 -07:00
build_templates Revert "[teamd service] teamd service should start after syncd (#2724)" (#2733) 2019-04-03 08:20:44 -07:00
dhcp [baseimage]: Initial changes for dhcp to support eth0 in a mgmt vrf (#2348) 2019-01-15 18:15:56 -08:00
docker [docker-engine]: upgrade docker engine to 18.09 (#2417) 2019-01-04 20:47:43 -08:00
image_config [hostcfgd] -- Fix the default for failthrough as false. 2019-04-03 23:16:56 +00:00
initramfs-tools removing dhcp- turn- off option from initrd (#2555) 2019-04-02 15:48:04 -07:00
scripts [services] Services which start containers now use 'docker wait' instead of 'docker attach' (#2661) 2019-03-08 10:59:41 -08:00
sshd [security] Do not generate ssh server keys for non RSA protocols (#2718) 2019-03-29 15:27:33 -07:00