Pihole 5.0 with Unbound no access to Facebook (FB, Instagram, WhatsApp sites)

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1

The issue I am facing:
I have updated to version 5.0 using unbound on raspberry pi. So far all worked well. However today I noticed problems with WhatsApp (cell phones connected to the wifi with Pihole) as well as when I entered the browser I cannot access instagram, Facebook or WhatsApp webs.

Interesting is when I do dig

dig instagram.com

; <<>> DiG 9.11.5-P4-5.1-Raspbian <<>> instagram.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 15310
;; flags: qr rd ra; QUERY: 1, ANSWER: 8, AUTHORITY: 4, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1460
;; QUESTION SECTION:
;instagram.com.			IN	A

;; ANSWER SECTION:
instagram.com.		43	IN	A	34.225.250.46
instagram.com.		43	IN	A	52.22.169.228
instagram.com.		43	IN	A	52.0.103.197
instagram.com.		43	IN	A	52.204.94.80
instagram.com.		43	IN	A	34.231.236.71
instagram.com.		43	IN	A	52.202.74.127
instagram.com.		43	IN	A	34.230.186.253
instagram.com.		43	IN	A	52.54.9.148

;; AUTHORITY SECTION:
instagram.com.		172783	IN	NS	ns-1349.awsdns-40.org.
instagram.com.		172783	IN	NS	ns-2016.awsdns-60.co.uk.
instagram.com.		172783	IN	NS	ns-384.awsdns-48.com.
instagram.com.		172783	IN	NS	ns-868.awsdns-44.net.

;; Query time: 6 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Sun May 17 20:32:18 CEST 2020
;; MSG SIZE  rcvd: 307

there is result but when I do ping I get

ping www.instagram.com
connect: Network is unreachable

Details about my system:
Raspbian Buster
Pihole 5.0

What I have changed since installing Pi-hole:
Updated to Version 5.0

2

Try

pihole -q instagram.com

What is the output?

3 
pihole -q instagram.com
 Match found in https://mirror1.malwaredomains.com/files/justdomains:
   contact-instagram.com 
   supporthelp-instagram.com 
   reportinstagram.com 
   helps-instagram.com
4

In addition to that I have had severe problems with accessing microsoft tools today (Outlook 365, Teams etc). For the moment I have reverted back to my traditional config (ISP based DNS). Wondering if I should format my sd card and do a complete new setup?

5

I wouldn't recommend that.

You can customize your pihole to work as you wish.

The pihole -q command will help you to find the blocking list/filter and you will be able to whitelist domains or disable the whole adlist if you prefer.

6

Thanks a lot for the recommendation. I have tried to work around it but no success I have to admit.
Tried to fresh install. Worked fine for some time but now back again to the topic that certain domains simply do not get found (mainly from Facebook group).
Happy to share any further data if you let me know what you would need.

7

Worked fine for some time and now I get this

dig web.whatsapp.com @127.0.0.1 -p 5335
;; Warning: Message parser reports malformed message packet.

; <<>> DiG 9.11.5-P4-5.1-Raspbian <<>> web.whatsapp.com @127.0.0.1 -p 5335
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 43091
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1472
;; QUESTION SECTION:
;web.whatsapp.com.		IN	A

;; ANSWER SECTION:
web.whatsapp.com.	3507	IN	CNAME	mmx-ds.cdn.whatsapp.net.
mmx-ds.cdn.whatsapp.net. 1420	RESERVED0 A	\# 4 1F0D5333

;; Query time: 0 msec
;; SERVER: 127.0.0.1#5335(127.0.0.1)
;; WHEN: Wed May 20 13:56:49 CEST 20
8

Does it occur with all DNS queries or only when you query web.whatsapp.com

9

it happens randomly on Facebook services (instagram, Facebook, WhatsApp) as well as on some microsoft sites