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64
PF-and-Fail2ban-on-FreeBSD.md
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64
PF-and-Fail2ban-on-FreeBSD.md
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With the firewall configured, it was time to set up Fail2ban. It can be installed from pkg, along with pyinotify for kqueue support.
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~~~
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pkg install py37-fail2ban-0.11.1_2
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pkg install py37-pyinotify-0.9.6
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~~~
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The default configuration is in /usr/local/etc/fail2ban/jail.conf, and overrides should be put in jail.local. First I needed to tell Fail2ban to use PF.
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~~~
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[DEFAULT]
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banaction = pf
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~~~
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his refers to the file /usr/local/etc/fail2ban/action.d/pf.conf, which adds banned IP addresses to a PF table called fail2ban. This on its own doesn’t do anything but register the address with PF, so I needed to add a rule to pf.conf to block the traffic.
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~~~
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table <fail2ban> persist
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block in quick from <fail2ban>
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~~~
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I added this rule directly below block in all so that it took precedence over my ICMP rules.
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Back to Fail2ban, I enabled the SSH jail, which watches for failed logins in /var/log/auth.log.
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~~~
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[sshd]
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enabled = true
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~~~
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Then I reloaded the PF configuration and started Fail2ban.
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~~~
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service pf reload
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echo 'fail2ban_enable="YES"' >> /etc/rc.conf
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service fail2ban start
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~~~
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To see it in action, I can tail the Fail2ban log, list the addresses in the fail2ban table, and inspect the statistics for my PF rules.
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~~~
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tail /var/log/fail2ban.log
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pfctl -t fail2ban -T show
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pfctl -v -s rules
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~~~
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My final jail.local looks like this:
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~~~
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[DEFAULT]
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bantime = 86400
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findtime = 3600
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maxretry = 3
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banaction = pf
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[sshd]
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enabled = true
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~~~
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https://www.sqlpac.com/fr/documents/linux-ubuntu-fail2ban-installation-configuration-iptables.html
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https://cmcenroe.me/2016/06/04/freebsd-pf-fail2ban.html
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@ -69,6 +69,35 @@ GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
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root@laptop:/root# update-grub
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~~~
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## disable encrypted swap
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~~~
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root@laptop:/root# swapoff -a
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root@laptop:/root# cryptsetup close cryptswap
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root@laptop:/root# mkswap /dev/nvme0n1p2
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root@laptop:/root# printf "RESUME=/dev/nvme0n1p2" | tee /etc/initramfs-tools/conf.d/resume
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root@laptop:/root# update-initramfs -u -k all
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root@laptop:/root# update-grub
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~~~
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* ajust /etc/fstab to
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~~~
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/dev/nvme0n1p2 none swap discard 0 0
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#/dev/mapper/cryptswap none swap discard 0 0
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~~~
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* check
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~~~
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root@laptop:/root# swapon -a
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root@laptop:/root# swapon --summary
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Nom de fichier Type Taille Utilisé Priorité
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/dev/nvme0n1p2 partition 32653308 0 -2
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root@laptop:/root#
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~~~
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### to be solve
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~~~
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119
full-zfs-ecrypt-uefi-boot-trouble.md
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119
full-zfs-ecrypt-uefi-boot-trouble.md
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## Fixing Debian/Ubuntu UEFI boot manager with Debian/Ubuntu Live
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source : [Code Bites](https://emmanuel-galindo.github.io/en/2017/04/05/fixing-debian-boot-uefi-grub/)
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Steps summary:
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- Boot Debian Live
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- Verify Debian Live was loaded with UEFI
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- Review devices location and current configuration
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- Mount broken system (via chroot)
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- Reinstall grub-efi
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- Verify configuration
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- Logout from chroot and reboot
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### Verify Debian Live was loaded with UEFI :
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~~~
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FromLive $ dmesg | grep -i efi
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~~~
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~~~
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FromLive $ ls -l /sys/firmware/efi | grep vars
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~~~
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### Mount broken system (via chroot)
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Mounting another system via chroot is the usual procedure to recover broken system’s. Once the chroot comand is issues, Debian Live will treat the broken system’s “/” (root) as its own. Commands run in a chroot environment will affect the broken systems filesystems and not those of the Debian Live.
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#### My system is full ZFS
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You have to add *-f* to force import because zfs think he should be on an other system.
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*-R* is to use an altroot path.
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~~~
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FromLive $ sudo su
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FromLive # zpool import -f -R /mnt rpool
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~~~
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~~~
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FromLive # zfs mount rpool/ROOT/ubuntu_myid
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~~~
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I'm in the case where ny zpool is encrypt !
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see : [zfs trouble encrypt zpool](zfs-trouble-live-boot-solution)
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### Prepare chroot env
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Mount the critical virtual filesystems with the following single command:
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~~~
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FromLive # for i in /dev /dev/pts /proc /sys /run; do sudo mount -B $i /mnt$i; done
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~~~
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Mount all zfs file system on rpool.
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~~~
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FromLive # zfs mount -a
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~~~
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Chroot to your normal (and broken) system device
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~~~
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FromLive # chroot /mnt
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~~~
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import also bpool but do not mount it *-N* :
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~~~
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InsideChroot # zpool import -N bpool
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~~~
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Mount your EFI partition:
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~~~
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InsideChroot # mount -a
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~~~
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You should see :
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* all your rpool zfs vol
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* /boot from your bpool.
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* Your efi partition.
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~~~
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InsideChroot # df -h
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Sys. de fichiers Taille Utilisé Dispo Uti% Monté sur
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udev 16G 0 16G 0% /dev
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tmpfs 3,2G 1,8M 3,2G 1% /run
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rpool/ROOT/ubuntu_19k4ww 272G 3,7G 269G 2% /
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bpool/BOOT/ubuntu_19k4ww 1,2G 270M 929M 23% /boot
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rpool/USERDATA/yourlogin_43xnpb 280G 12G 269G 5% /home/yourlogin
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rpool/USERDATA/root_43xnpb 269G 640K 269G 1% /root
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rpool/ROOT/ubuntu_19k4ww/srv 269G 128K 269G 1% /srv
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rpool/ROOT/ubuntu_19k4ww/var/lib 269G 34M 269G 1% /var/lib
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rpool/ROOT/ubuntu_19k4ww/var/log 269G 47M 269G 1% /var/log
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rpool/ROOT/ubuntu_19k4ww/var/spool 269G 128K 269G 1% /var/spool
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/dev/nvme0n1p1 511M 16M 496M 4% /boot/efi
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rpool/ROOT/ubuntu_19k4ww/var/games 269G 128K 269G 1% /var/games
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rpool/ROOT/ubuntu_19k4ww/var/snap 269G 128K 269G 1% /var/snap
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rpool/ROOT/ubuntu_19k4ww/var/mail 269G 128K 269G 1% /var/mail
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rpool/ROOT/ubuntu_19k4ww/usr/local 269G 256K 269G 1% /usr/local
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rpool/ROOT/ubuntu_19k4ww/var/www 269G 128K 269G 1% /var/www
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rpool/ROOT/ubuntu_19k4ww/var/lib/AccountsService 269G 128K 269G 1% /var/lib/AccountsService
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rpool/ROOT/ubuntu_19k4ww/var/lib/NetworkManager 269G 256K 269G 1% /var/lib/NetworkManager
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rpool/ROOT/ubuntu_19k4ww/var/lib/apt 269G 77M 269G 1% /var/lib/apt
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rpool/ROOT/ubuntu_19k4ww/var/lib/dpkg 269G 41M 269G 1% /var/lib/dpkg
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/dev/nvme0n1p1 511M 16M 496M 4% /boot/efi
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~~~
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### Reinstall grub-efi
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~~~
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InsideChroot # apt-get install --reinstall grub-efi
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~~~
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~~~
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InsideChroot # update-grub
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~~~
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@ -1,16 +1,22 @@
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# zfs trouble live boot solution
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## zpool trouble you can mount it from live systeme
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boot on usb drive which permit zfs then :
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~~~
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zpool import -R /mnt rpool
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zfs load-key rpool
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zfs mount rpool/USERDATA/nomad_e8bdbt
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~~~
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## in case you wanted to change zpool passwd
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~~~{.shell}
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zfs change-key rpool
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~~~
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---
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format: markdown
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toc: no
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title: zfs trouble encrypt zpool
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...
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# zfs trouble live boot solution
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## zpool trouble you can mount it from live systeme
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boot on usb drive which permit zfs then :
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~~~
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zpool import -R /mnt rpool
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zfs load-key rpool
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zfs mount rpool/USERDATA/nomad_e8bdbt
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~~~
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## in case you wanted to change zpool passwd
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~~~{.shell}
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zfs change-key rpool
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~~~
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