Alpine

OpenSSH 2FA Google Auth

Alpine, Linux, Security, SSH

Let’s give a try with Alpine Linux, OpenSSH and 2FA with Google Authenticator.

add Packages

apk add openssh openssh-server-pam google-authenticator openssh-doc google-authenticator-doc libqrencode

Configure GoogleAuth

touch /etc/pam.d/sshd
ln /etc/pam.d/sshd /etc/pam.d/sshd.pam

cat << 'EOF' >> /etc/pam.d/sshd.pam
account   include     base-account

auth      required    pam_env.so
auth      required    pam_nologin.so  successok
auth      required    /lib/security/pam_google_authenticator.so   echo_verification_code grace_period=57600 nullok
auth      required    pam_unix.so   md5 sha512
EOF

update sshd_config

cat << 'EOF' >> /etc/ssh/sshd_config
PasswordAuthentication no
AuthenticationMethods any
UsePAM yes
EOF

Restart SSHD

service sshd restart

Setup User

su - USERNAME
google-authenticator

Response

Smokeping on Docker

Alpine, Docker, Linux, Network

If you have Docker running somehwere … bring up your Smoke Instance within Seconds ;)

Smokeping

docker run --name smoke --restart always -d -p 80:80 linuxserver/smokeping

Show Containers

docker ps

docker-test:~# docker ps
CONTAINER ID   IMAGE                   COMMAND   CREATED         STATUS         PORTS                               NAMES
8f8b872ac1c3   linuxserver/smokeping   "/init"   6 minutes ago   Up 6 minutes   0.0.0.0:80->80/tcp, :::80->80/tcp   smoke

Shell into Docker

docker exec -it smoke /bin/sh

Check Netstat

root@8f8b872ac1c3:/# netstat -an
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN
Active UNIX domain sockets (servers and established)
Proto RefCnt Flags       Type       State         I-Node Path
unix  2      [ ACC ]     STREAM     LISTENING     406670 s
unix  2      [ ACC ]     STREAM     LISTENING     406078 /run/apache2/fcgidsock/137.0

Preview