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Skip Google Authenticator Authentication if Logging in from the Local Network

You may trust systems on you local network enough not not require that SSH connections from them use Google Authenticator. If so, modify /etc/pam.d/sshd so that it looks like this:
auth [success=1 default=ignore] pam_access.so accessfile=/etc/security/access-local.conf
auth       required     pam_google_authenticator.so
Then add the file /etc/security/access-local.conf with the contents:

# Google Authenticator can be skipped on local network
+ : ALL : 192.168.0.0/24
+ : ALL : LOCAL
- : ALL : ALL


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