Great tutorial thank you.
How do you update Pi-hole on synology?
Hi all,
Great tutorial! For the time being everything working perfectly except the white&black listing option in the admin webpage. I can add any server from terminal, but not from web...any clue?
My config:
DS213j
DSM 6.0.2-8451 Update 5
php 7.0 (beta) & 5.6 (beta) installed.
Hi bakman2, great tutorial...
I tried to run it on dsm6 (6.0.2 update 5), but dns is not reachable from other client.
I discovered that if I uninstall docker and I disable "Open vSwitch" pihole/dns start to work...
So there's some problem with open vSwitch... I tried to let it enabled, but also if I select "ovs_eth0 (and not eth0)" as interface during pihole setup, the dns doesn't work.
I thing that some type of port forward or port map is required... in fact, when using docker, you need to setup port forward if u want to access, for example, a web server in a container...
I don't use docker, so I turned off open vSwitch and pihole is working again..
Thanks
ema
Got the same problem. Tried to reinstall and uninstall multiple times
the result of install.log is
cat install.log
::: Checking if user 'pihole' exists...
::: User 'pihole' already exists
:::
::: Installing scripts to /opt/pihole... done.
:::
::: Installing configs...
::: Existing dnsmasq.conf found... it is from a previous pi-hole install.
::: Backing up dnsmasq.conf to dnsmasq.conf.orig... done.
::: Restoring default dnsmasq.conf... done.
::: Copying 01-pihole.conf to /etc/dnsmasq.d/01-pihole.conf... done.
:::
::: Creating log file and changing owner to dnsmasq... already exists!
:::
::: Installing pihole custom index page... Existing page detected, not overwriting
::: Installing sudoer file... done!
:::
::: Installing latest Cron script... done!
::: Configuring iptables for httpd and dnsmasq..
Any help is appreciated.
Regards
Mikkel
Did you try the reconfigure option?
pihole -r
Yup, that didn't work either... I think there is a problem with setup because port 80 is already occupied..
I tried to install a fresh Ubuntu server and install PiHole here -and then copy the content of /etc/pihole to the Synology box, and then configure setupVars.conf with interface and ipaddress..
It seems to work.. so I'll give it a few days of testing 
Thanks for your effort
regards
Mikkel
As i mentioned
The Pi-hole webserver runs on port 80, which is usually already occupied by the webserver, so we need to modify the webserver config:
nano /etc/lighttpd/lighttpd.conf
modify server.port = xxxx to a suitable port (higher than 1023) ctrl+x to save
Thanks for the great howto. One short comment from my experience on a DS212j with the latest DSM 6: the command "cat /proc/mount > /etc/mtab" did not work initialy. I had to mount proc first with the command "mount -t proc proc /proc".
3 Likes
I'm sure this is user error, but I'm stuck on step 0. Not new to linux but new to chroot... any pointers?
john@xxx01:~ $
john@xxx01:~ $ sudo su-
Password:
sudo: su-: command not found
john@xxx01:~ $ sudo su -
root@xxx01:/# /var/packages/debian-chroot/scripts/start-stop-status status
Debian Chroot is not running
root@xxx01:/# /var/packages/debian-chroot/scripts/start-stop-status start
Starting Debian Chroot ...
root@xxx01:/# /var/packages/debian-chroot/scripts/start-stop-status chroot
bash: warning: setlocale: LC_ALL: cannot change locale (en_US.utf8)
root@xxx01:/# apt-get update
bash: apt-get: command not found
root@xxx01:/#
edit: whoa... that was odd. After taking 5 minutes to post this question, I returned to the terminal and hit up to try the apt-get update again. Terminal output continues below:
root@xxx01:/# apt-get update
Get:1 http://debootstrap.invalid jessie InRelease
Ign http://debootstrap.invalid jessie InReleaseed in /etc/apt/trusted.gpg.d/.
Get:2 http://debootstrap.invalid jessie/main amd64 Packages/DiffIndex
Get:3 http://debootstrap.invalid jessie/main Translation-en
Get:4 http://debootstrap.invalid jessie/main amd64 Packages
Fetched 1306 B in 3s (428 B/s)
W: GPG error: http://debootstrap.invalid jessie InRelease: Could not execute 'gpgv' to verify signature (is gpgv installed?)
W: Failed to fetch copy:/var/lib/apt/lists/partial/debootstrap.invalid_dists_jessie_main_i18n_Translation-en Invalid file format
W: Failed to fetch copy:/var/lib/apt/lists/partial/debootstrap.invalid_dists_jessie_main_binary-amd64_Packages Invalid file format
E: Some index files failed to download. They have been ignored, or old ones used instead.
E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable)
E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?
root@xxx01:/#
Maybe on my DS1812+ it takes some time to enable chroot?? But what about the gpgv error?
edit2: no clue what's going on... but running apt-get update again got me past the gpgv error. At this point I'm just posting my trial and error in case anyone else runs across the same issue. Seems like stubborn persistence is key. 
Thanks for the great howto. One short comment from my experience on a DS212j with the latest DSM 6: the command "cat /proc/mount > /etc/mtab" did not work initialy. I had to mount proc first with the command "mount -t proc proc /proc".
Thanks, this worked form me:
root@xxx01:/home# cat /proc/mounts > /etc/mtab
cat: /proc/mounts: No such file or directory
root@xxx01:/home# mount -t proc proc /proc
root@xxx01:/home# cat /proc/mounts > /etc/mtab
root@xxx01:/home#
Ok, I seem to be troubleshooting 2 different issues now. I think they are unrelated but let me know what you think:
Issue 1
Lighttpd & Dnsmasq both install/run without a problem and Pihole seems to be running fine but I can't get my Router (Fios Actiontec G1100) to propagate the new DNS setting. All devices still point DNS to the router/gateway after a reboot/network restart.
For clarity, in the router I'm setting the DNS to the PiHole/Synology IP at the following location (My Network -> Network Connections -> Broadband Connection -> Settings -> DNS Server). After a few router and client reboots, I couldn't get any client to show the new DNS settings.
Figuring this was just a router issue and wanting to test out PiHole, I moved forward setting the DNS settings on my Macbook client manually to the PiHole/Synology IP. This worked, (and wow was it fast, with no ads) but led to my 2nd issue...
Issue 2
I lost the Admin console. Wanting to see the stats page fill out, I went to see the admin console and got this:
Failed Host Check: pi.hole:8082 vs http://xxx.xxx.xxx.xxx, http://pi.hole, http://pi.hole, http://localhost
where xxx.xxx.xxx.xxx is the PiHole/Synology IP.
I should note that at some point today I ran pihole -r and it updated to 2.10. This error only showed up after that. Not sure if it's a lighttpd error or PiHole error but Google comes up with nothing for either.
Again, ad blocking seems to be working - just can't see the admin console:
root@xxx01:/# curl -i http://pi.hole:8082/admin/api.php?summary
HTTP/1.1 200 OK
X-Pi-hole: The Pi-hole Web interface is working!
X-Frame-Options: DENY
Set-Cookie: PHPSESSID=3imohdj3r5b18m2i35q90sk7l3; path=/
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Content-type: text/html; charset=UTF-8
Transfer-Encoding: chunked
Date: Wed, 21 Dec 2016 21:27:06 GMT
Server: lighttpd/1.4.35
Failed Host Check: pi.hole:8082 vs http://xxx.xxx.xxx.xxx, http://pi.hole, http://pi.hole, http://localhostroot@syn01:/#
Any ideas? thx!
Edit: seems I can't have more than 3 posts in this thread because I'm new. To answer the question in the next post, yes 8082 in the lighttpd.conf with a restart. Does 8082 go anywhere else?
An you configured it on 8082? And restarted lighttpd after that?
Hi,
I'm experencing the same issue (as johnny above Issue 2) since upgrading last night to 2.10, i installed using the original sequence (inital post) and was working fine but admin panel was broken after the upgrade. I've tried reinstalling and running though the commands again (editing ports, restarting services etc.) but no luck. It appears in the logs that all is working and blocks are happening just the admin panel isn't loading.
I initally just ran "pihole -up" in chroot and all updated fine but appered to disable the web panel. Then tried a full reinstall selecting all the same settings as before but no luck, tried different settings (interfaces etc.) but still no luck. all services are running and logs are fine.
I'll keep trying and post if i figure it out, if not I'll post logs
This is my first install, and i am experiencing the same issues as johnny2678 with the
"Failed Host Check: pi.hole:31415 vs http://xxx.xxx.xxx.xxx, http://pi.hole, http://pi.hole, http://localhost"
The DNS server seems to be working just fine, but the admin panel is not accessible. I have tried reinstalling.
Since BeRoKr is experiencing the same issue i think this is linked to the recent version upgrade.
Investigated some more, found this in the auth.php file:
root@DiskStation:/# grep -rnw '/' -e "Failed Host Check"
/var/www/html/admin/php/auth.php:37: log_and_die("Failed Host Check: " . $_SERVER['HTTP_HOST'] .' vs '. join(', ', $AUTHORIZED_HOSTNAMES));
The code that generates the $AUTORIZED_HOSTNAMES array does not account for installations that deviate from the standard web port of your browser when checking for host header spoofing. And good luck getting port 80 unbound on your Synology. Because i first tried for an hour to get Synology unbound web server from port 80, and it apparently was easier to fix the source code.
Here is the fix:
File: /var/www/html/admin/php/auth.php
// Check CORS
$AUTHORIZED_HOSTNAMES = array(
'http://' . $ipv4 . ':' . $_SERVER['SERVER_PORT'],
'http://' . $_SERVER['SERVER_NAME'] . ':' . $_SERVER['SERVER_PORT'],
'http://pi.hole' . ':' . $_SERVER['SERVER_PORT'],
'http://localhost' . ':' . $_SERVER['SERVER_PORT'],
);
I have made a pull request here: https://github.com/pi-hole/AdminLTE/pull/279
4 Likes
Saw the response and the link from the Github/Changelog pages thought I'd link for anyone else:
Issue has been picked up and now is WIP #275
2 Likes
Thank you cbgj, This fixed my problem!
Minor note: the last comma is not needed after 'http://localhost' . ':' . $_SERVER['SERVER_PORT'],
1 Like
Thanks cbgj same as noudklaver all fixed with this modification
Typing /var/www/html/admin/php/auth.php
I got permission dennied.
I logtin as admin then sudo -i and starting chroot.