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+In order to boot PfSense via iPXE,
+you need to do the following:
+
+1. Download ISO from https://nyifiles.pfsense.org/mirror/downloads/pfSense-CE-2.3.4-RELEASE-amd64.iso.gz
+   
+   You should also check the SHA256 hash:
+   `sha256 -c 610b2a8c696e1d1854845d553ce8540debaab9d78ed6c15ce83872eaeac9d05f pfSense-CE-2.3.4-RELEASE-amd64.iso.gz`
+   
+2. Extract the ISO contents to a directory called
+    `images/pfsense` in TFTP root:
+    `gzip -d pfSense-CE-2.3.4-RELEASE-amd64.iso.gz`
+    
+   In order to extract the contents, you need to mount
+   the ISO with following commands (example from FreeBSD):
+   `mount_cd9660 /dev/$(mdconfig -a -t vnode -f pfSense-CE-2.3.4-RELEASE-amd64.iso) /mnt`
+   
+   To mount the ISO from GNU / Linux use:
+   `mount -o loop pfSense-CE-2.3.4-RELEASE-amd64.iso /mnt`
+   
+   Then:
+   `rsync -avvP /mnt/ /srv/tftp/images/pfsense/`
+   You need to have `rsync` installed.
+
+2. Relevant entry in DHCP server config:
+    `option root-path /srv/tftp/images/pfsense;`
+   `/srv/tftp/images/pfsense` is the path to the extracted ISO.
+
+3. Relevant entries in PXELINUX config:
+```
+label PfSense
+ menu label PfSense
+ pxe images/pfsense/boot/pxeboot
+```
+
+The path `images/pfsense/boot/pxeboot` is relative to TFTP root directory.
+It's a path to the PXE loader in the extracted PfSense installation image.
+
+Unfortunately, there's no mechanism for unattended installation of PfSense.
+PfSense documentation doesn't mention this:
+https://doc.pfsense.org/index.php/Installing_pfSense