pfBlockerNG not logging anything by default?

[rasputinthegreatest]

@Gertjan I have not set that in Unbound. No Python Module is active there. I saw that in another thread but I don't think it will change anything. Also which of these settings for the unbound python mode should be enabled here?

I also have no script to select under Unbound:

[rasputinthegreatest]

@Gertjan After changing to Unbound python mode I see some stuff. It also shows me a different response now in nslookup. This is new ";; Got SERVFAIL reply from 127.0.0.53
** server can't find c.bing.com: SERVFAIL" Is this supposed to happen?

nslookup c.bing.com
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
Name:	c.bing.com
Address: 0.0.0.0
;; Got SERVFAIL reply from 127.0.0.53
** server can't find c.bing.com: SERVFAIL

Under alerts I see this now:

Soure is almost every time 127.0.0.1 and my pfsense domain

Also any idea why I see this when I am not using google dns?

[rasputinthegreatest]

Is it normal to see these entries under Reports -> DNSBL Reply Stats? I have filtered for feodotracker.

If I look under Overview tab I see stuff happening now but once I click the little 2 to send me to Alerts it shows no Alerts there.

I also see a lot of 127.0.0.1 and sometimes my local IPs. Is there a way to see which device made the connection under 127.0.0.1?

I also assume these are supposed to show up once an hour when the new lists are checked?

[Gertjan]

@rasputinthegreatest said in pfBlockerNG not logging anything by default?:

After changing to Unbound python mode I

and then Save the unbound/resolver settings.
the Apply (mandatory).

Then here :

and check that DNSBL Mode is set to Unbound Python mode.
Leave the other options as is - you can come back later and select them - and try to understand what they are doing (I admit that some of them are still rocket sience to me, so I fall back to "KIS, don't activate what I don't understand").

Save this page - at the bottom.

Then :

and hit Run.

Check the log produced for any issues - report what you find suspect or don't understand.

[rasputinthegreatest]

@Gertjan I did it exactly the way you showed. I posted some of the stuff I don't understand like it showing:
Servfail now. I see some resolves for feodotracker. I assume this is just the updates for the lists and not actually stuff being blocked? I only see 3 blocks so far on the main overview but not in the logs still. I also don't understand all these 127.0.0.1 resolves that don't tell me what device initiated it. Should I be seeing more blocks in general from DNSBL?

[Gertjan]

@rasputinthegreatest

This :

did you execute that on the pfSense command line ?

This :

;; Got SERVFAIL reply from 127.0.0.53
** server can't find c.bing.com: SERVFAIL

means that the device that you are using was told that its DNS is 127.0.0.53. (that is the device itself !)
But ... non DNS server is listing on that address.
That device, can't you set it to use DHCP ? If you do, it will get an IP, a network, a gateway and a DNS, where the last two will be the pfSense LAN IP. From then on, that device will have a working In tenet connection, local network and DNS. That's why every device you buy (create) use DHCP ... as it works out of the box.

If I execute the same command on pfSense, I see :

[25.07-RELEASE][root@pfSense.bhf.tld]/root: nslookup c.bing.com
Server:         127.0.0.1
Address:        127.0.0.1#53

Non-authoritative answer:
c.bing.com      canonical name = c-bing-com.ax-0001.ax-msedge.net.
c-bing-com.ax-0001.ax-msedge.net        canonical name = ax-0001.ax-msedge.net.
Name:   ax-0001.ax-msedge.net
Address: 150.171.27.10
Name:   ax-0001.ax-msedge.net
Address: 150.171.28.10
Name:   ax-0001.ax-msedge.net
Address: 2620:1ec:33:1::10
Name:   ax-0001.ax-msedge.net
Address: 2620:1ec:33::10

Your "127.0.0.53" tells me : the DNS request isn't asked from pfSense, which has some LAN IP and not a localhost IP - but a local DNS (resolver ? forwarder ?) - for for what I know, maybe this process doesn't use pfSense (== unbound => pfBLockerng ...)

hen I execute on a PC, situated on my pfSense LAN , I see :

C:\Users\Gauche>nslookup c.bing.com
Serveur :   pfSense.hf.tld
Address:  2a01:cb19:dead:beef:92ec:77ff:fe29:392c

Réponse ne faisant pas autorité :
Nom :    ax-0001.ax-msedge.net
Addresses:  2620:1ec:33:1::10
          2620:1ec:33::10
          150.171.27.10
          150.171.28.10
Aliases:  c.bing.com
          c-bing-com.ax-0001.ax-msedge.net

where "2a01:cb19:dead:beef:92ec:77ff:fe29:392c" is the LAN (IPv6) of my pfSense.
"pfSense.hf.tld" is the host name of my pfSense.

This means my Windows PC uses pfSense as it's "DNS server", which is nice, as pfSense uses unbound as the server = the resolver, and unbound sues also pfBlockerng to filter.
My unbound settings are prertty default, I resolve with the resolver.

@rasputinthegreatest said in pfBlockerNG not logging anything by default?:

Also any idea why I see this when I am not using google dns?

Not you, the person. Your devices, processes that are running on them, if you have something that is android (Google) base will use 8.8.8.8 as their role is : whatever you do, communicate it to Google (that is the deal). So, yeah, 8.8.8.8 (the reverse) can be looked up for.
It won't be pfSense that is looking for the reverse of 8.8.8.8. Netgate isn't Google, pfSense doesn't use 8.8.8.8. 8.8.8.8 is a resolver, pfSense has its own resolver (unbound).

[rasputinthegreatest]

@Gertjan said in pfBlockerNG not logging anything by default?:

means that the device that you are using was told that its DNS is 127.0.0.53. (that is the device itself !)
But ... non DNS server is listing on that address

But internet is working. It already uses DHCP. It is a Ubuntu device and afaik that's how the network manager works in Ubuntu. It is a link to another file in the conf. It still resolves to my pfsense 192.168.1.1 and I can see resolves from the Ubuntu devices IP in the logs. It might be a Ubuntu setting but I am not sure.

@Gertjan said in pfBlockerNG not logging anything by default?:

Serveur : pfSense.hf.tld
Address: 2a01:cb19:dead:beef:92ec:77ff:fe29:392c

Réponse ne faisant pas autorité :
Nom : ax-0001.ax-msedge.net
Addresses: 2620:1ec:33:1::10
2620:1ec:33::10
150.171.27.10
150.171.28.10
Aliases: c.bing.com
c-bing-com.ax-0001.ax-msedge.net

I am getting the same response on a Windows 10 device but c.bing.com is on the blocklist of DNSBL. So it should not work, right?

Maybe the issue comes from running Double-NAT? I have my ISP router (running Quad9DNS) and Pfsense sits behind it with a local IP as WAN IP.
Here are my Unbound settings. General Setup I already showed above.

@Gertjan said in pfBlockerNG not logging anything by default?:

Your devices, processes that are running on them

There should be no device running google anywhere in my network.At least nothing behind pfsense.

[Gertjan]

@rasputinthegreatest said in pfBlockerNG not logging anything by default?:

It is a Ubuntu device

Ah, ok. I'm not familiar with Unbuntu but I do use Debian myself.
Like pfSense (based upon FreeBSD) there is file called /etc/resolv.conf which contains something like :

nameserver 127.0.0.1
nameserver ::1
....

which means that programs process running on that system know where to go with their DNS requests.
Guess who listens on port 127.0.0.:53 on pfSense ?
Let's ask ;)
[25.07-RELEASE][root@pfSense.bhf.tld]/root: sockstat -4 | grep ':53'
avahi avahi-daem 61533 13 udp4 *:5353 :
unbound unbound 14531 5 udp4 *:53 :
unbound unbound 14531 6 tcp4 *:53 :
....

If you Ubuntu was told that DNS requests have to send to 127.0.0.53 (probably port 53) then there must be a process that handles DNS requests listening on that address:port. If there is none, then you get a service fail or "SERV FAIL" as no DNS service is avaible.
That needs to be set up correced ^^

@rasputinthegreatest said in pfBlockerNG not logging anything by default?:

I have my ISP router (running Quad9DNS)

I have also a ISP 'upstream' router. Somewhat mandatory for me as that device knows how to talk to the 'laser led wire' (fiber) and handles the login against my ISP.
My ISP router probably uses the ISP's DNS servers, I'm not sure.
pfSense gets a WAN IP from this ISP router, which will be a RFC1918 like 192.168.10.4.
By default, pfSense won't use an DNS suggestion that comes with the lease from the ISP routers DHCP server, as (my) pfSense resolves.

Here are my Unbound settings. General Setup I already showed above

Pretty default so you're good.

[rasputinthegreatest]

@Gertjan In my resolv.conf I see this:

  GNU nano 7.2                    /etc/resolv.conf                              
# /etc/resolv.conf and seeing this text, you have followed the symlink.
#
# This is a dynamic resolv.conf file for connecting local clients to the
# internal DNS stub resolver of systemd-resolved. This file lists all
# configured search domains.
#
# Run "resolvectl status" to see details about the uplink DNS servers
# currently in use.
#
# Third party programs should typically not access this file directly, but only
# through the symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a
# different way, replace this symlink by a static file or a different symlink.
#
# See man:systemd-resolved.service(8) for details about the supported modes of
# operation for /etc/resolv.conf.

nameserver 127.0.0.53
options edns0 trust-ad
search .

If I follow the commentary and use "resolvectl status" I get this:

Global
         Protocols: -LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
  resolv.conf mode: stub

Link 2 (wlp4s0)
    Current Scopes: DNS
         Protocols: +DefaultRoute -LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
Current DNS Server: 192.168.1.1
       DNS Servers: 192.168.1.1

DNSSEC is enabled in Pfsense but doesnt seem to work in Ubuntu. Maybe DNSOverTLS is the issue? I read about that somewhere in regards to DNSBL.

Your sockstat command does not work on Ubuntu. I only see an active TCP connection from google that contains 53 in the port number

So you are pretty much running the same setup as me. I don't know what I am missing that is not working here.

[Gertjan]

@rasputinthegreatest said in pfBlockerNG not logging anything by default?:

Your sockstat command does not work on Ubu

That's normal. pfSense isn't Ubunutu (Debian, = Linux based).
It's using another ODS : FreeBSD.
So some commands look the same, some don't.

This returns somewhat the same results :

netstat -naptul | grep ':53'

Is this "Link 2 (wlp4s0)" your Ubuntu interface ?

The option "-DNSOverTLS" mighty in indicate that DNSOverTLS should be used ?
You are the Unbun user, so you tell me.
I know that the pfSense unbound doesn't use the TLS port :

as that port (TCP, port 953) needs to be activated so DNS TLS is supported.

As pSense uses a DNSSEC capable resolver, no need to for Ubuntu to deal with DNSSEC.
Use this https://wander.science/projects/dns/dnssec-resolver-test/ from a LAN 'PC' device and a browser and you'll see ;

If your PC (or browser settings !!) use another DNS - not pfSense, well, that you might see different results.

[rasputinthegreatest]

@Gertjan I am suddenly seeing werid resolves:

192.168.1.31	reply A | A 	86400 	  	ipv4only.arpa 	192.0.0.170 	unk

What could that be?
I also saw

192.168.1.85	reply A | SOA 	3140 	  	desktop-AbTuMTYW.local 	SOA 	unk

None of these things exist on my network. Why is it resolving these things?

@Gertjan said in pfBlockerNG not logging anything by default?:

As pSense uses a DNSSEC capable resolver, no need to for Ubuntu to deal with DNSSEC.
Use this https://wander.science/projects/dns/dnssec-resolver-test/ from a LAN 'PC' device and a browser and you'll see ;

This succeded

@Gertjan said in pfBlockerNG not logging anything by default?:

Is this "Link 2 (wlp4s0)" your Ubuntu interface ?

Yes it is. If I use the netstat command I see:

tcp        0      0 127.0.0.53:53           0.0.0.0:*               LISTEN      792/systemd-resolve 
tcp        0      0 127.0.0.54:53           0.0.0.0:*               LISTEN      792/systemd-resolve 
udp        0      0 127.0.0.54:53           0.0.0.0:*                           792/systemd-resolve 
udp        0      0 127.0.0.53:53           0.0.0.0:*                           792/systemd-resolve 
udp        0      0 0.0.0.0:5353            0.0.0.0:*                           1071/avahi-daemon:  
udp6       0      0 :::5353                 :::*                                1071/avahi-daemon:

[Gertjan]

@rasputinthegreatest said in pfBlockerNG not logging anything by default?:

What could that be?

Locate the device "192168.1.31", it's a device on your LAN. That 's the one who wanted to, knwo the 'A' or IPv4 of the host name "ipv4only.arpa".
Unbound was just answering : it's "192.0.0.170" to 192.168.1.31.

@rasputinthegreatest said in pfBlockerNG not logging anything by default?:

None of these things exist on my network. Why is it resolving these things?

192.168.1.85 doesn't exist on your LAN ?
Not in the arp cache ?
Not a DHCP lease (might be a device with a static setup) ?

@rasputinthegreatest said in pfBlockerNG not logging anything by default?:

tcp 0 0 127.0.0.53:53 0.0.0.0:* LISTEN 792/systemd-resolve
tcp 0 0 127.0.0.54:53 0.0.0.0:* LISTEN 792/systemd-resolve
udp 0 0 127.0.0.54:53 0.0.0.0:* 792/systemd-resolve
udp 0 0 127.0.0.53:53 0.0.0.0:* 792/systemd-resolve

Well well, there you have you Ubuntu DNS !
You saw the name of the system process, : is "systemd-resolve" a resolver ? If so, then your Ubuntu totally bypasses the pfSense resolver (and pfBlockerng) . This means that DNS requests made by your Unbuntu are being handled by Ubuntus own resolver.

edit : when your Ubuntu tries to use this 127.0.0.53 ( systemd/resolve ) it errors out .... (the serv fail)
Without details, set your system to, use 192.168.1.1 = pfSense, and you'll be good.
That said, it's your system. Time to check things out ?!

[rasputinthegreatest]

@Gertjan said in pfBlockerNG not logging anything by default?:

192.168.1.85 doesn't exist on your LAN ?

This IP does exist on my LAN but why it resolves some weird random desktop-sdshdsd.local?

I am overwhelmed by the logs and see so much weird stuff like this. None of these things are on my network. Also no 192.168.51.5 exists on my network either.

DNS-reply,Aug 5 12:42:25,reply,A,NSEC,1835,desktop-A5k217Qu.local,192.168.1.86,NXDOMAIN,unk
DNS-reply,Aug 5 10:09:22,reply,A,SOA,2942,hometheater-tQNIYv.local,192.168.1.86,SOA,unk
DNS-reply,Aug 5 14:22:28,reply,A,SOA,3146,desktop-ZmWfGXFW.local,192.168.1.86,SOA,unk
DNS-reply,Aug 5 10:38:49,local,PTR,PTR,Unk,10.34.1.10.in-addr.arpa,192.168.1.86,NXDOMAIN,unk
DNS-reply,Aug 5 10:39:03,local,PTR,PTR,Unk,5.51.168.192.in-addr.arpa,192.168.1.86,NXDOMAIN,unk
DNS-reply,Aug 5 10:39:09,local,PTR,PTR,Unk,10.170.0.10.in-addr.arpa,192.168.1.86,NXDOMAIN,unk
DNS-reply,Aug 5 11:21:24,reply,A,SOA,2827,hometheater-WADQ2.local,192.168.1.86,SOA,unk

I checked the pfblockerng logs and at 11:59:58 I see all these resolve. I assume it is related to time servers? I cant find any good info on what zorac.sf-bay.org is for example?
EDIT: Seems to be related to Perl which is used by pfsense plugins. But just a guess.

DNS-reply,Aug 5 11:59:58,resolver,AAAA,AAAA,86400,anyns.pch.net,127.0.0.1,2001:500:14:6004:ad::1,unk
DNS-reply,Aug 5 11:59:58,resolver,A,A,86400,anyns.pch.net,127.0.0.1,204.61.216.4,unk
DNS-reply,Aug 5 11:59:58,resolver,A,A,57600,f.ntpns.org,127.0.0.1,139.178.72.201,unk
DNS-reply,Aug 5 11:59:58,resolver,AAAA,AAAA,57600,f.ntpns.org,127.0.0.1,2a05:dfc1:cb1:123::,unk
DNS-reply,Aug 5 11:59:58,resolver,A,A,86400,dns2.udel.edu,127.0.0.1,128.175.13.17,unk
DNS-reply,Aug 5 11:59:58,resolver,AAAA,SOA,600,dns1.udel.edu,127.0.0.1,SOA,unk
DNS-reply,Aug 5 11:59:58,resolver,AAAA,SOA,600,dns2.udel.edu,127.0.0.1,SOA,unk
DNS-reply,Aug 5 11:59:58,resolver,A,A,86400,ns1.eu.bitnames.com,127.0.0.1,165.227.133.206,unk
DNS-reply,Aug 5 11:59:58,resolver,AAAA,AAAA,86400,ns1.eu.bitnames.com,127.0.0.1,2a03:b0c0:3:d0::c0:4001,unk
DNS-reply,Aug 5 11:59:58,resolver,A,A,3600,osdn.services.net,127.0.0.1,192.55.226.68,unk
DNS-reply,Aug 5 11:59:58,resolver,A,A,57600,e.ntpns.org,127.0.0.1,45.33.123.43,unk
DNS-reply,Aug 5 11:59:58,resolver,A,A,57600,c.ntpns.org,127.0.0.1,2.59.255.53,unk
DNS-reply,Aug 5 11:59:58,resolver,AAAA,SOA,600,dns2.udel.edu,127.0.0.1,SOA,unk
DNS-reply,Aug 5 11:59:58,resolver,AAAA,SOA,600,dns1.udel.edu,127.0.0.1,SOA,unk
DNS-reply,Aug 5 11:59:58,resolver,AAAA,SOA,300,zorac.sf-bay.org,127.0.0.1,SOA,unk
DNS-reply,Aug 5 11:59:58,resolver,A,SOA,300,zorac.sf-bay.org,127.0.0.1,SOA,unk
DNS-reply,Aug 5 11:59:58,resolver,A,A,10400,g.ntpns.org,127.0.0.1,212.12.50.229,unk
DNS-reply,Aug 5 11:59:58,resolver,A,A,3600,sdn.iecc.com,127.0.0.1,72.249.171.254,unk
DNS-reply,Aug 5 11:59:58,resolver,AAAA,AAAA,57600,e.ntpns.org,127.0.0.1,2400:6180:0:d1::695:5001,unk
DNS-reply,Aug 5 11:59:58,resolver,AAAA,AAAA,3600,sdn.iecc.com,127.0.0.1,2606:4300:0:4::106e,unk
DNS-reply,Aug 5 11:59:58,resolver,A,A,3600,sdn.iecc.com,127.0.0.1,72.249.171.254,unk
DNS-reply,Aug 5 11:59:58,resolver,AAAA,AAAA,3600,osdn.services.net,127.0.0.1,2001:470:1f07:1126:4e:6f74:6269:6e64,unk
DNS-reply,Aug 5 11:59:58,resolver,AAAA,AAAA,57600,c.ntpns.org,127.0.0.1,2600:3c02::f03c:92ff:fe5f:baf1,unk
DNS-reply,Aug 5 11:59:58,resolver,AAAA,AAAA,3600,ns2.everett.org,127.0.0.1,2001:470:1:205::230,unk
DNS-reply,Aug 5 11:59:58,resolver,A,A,86400,ns2.us.bitnames.com,127.0.0.1,107.170.182.174,unk
DNS-reply,Aug 5 11:59:58,resolver,AAAA,SOA,300,zorac.sf-bay.org,127.0.0.1,SOA,unk
DNS-reply,Aug 5 11:59:58,resolver,AAAA,AAAA,3600,sdn.iecc.com,127.0.0.1,2606:4300:0:4::106e,unk
DNS-reply,Aug 5 11:59:58,resolver,A,A,86400,ns3.us.bitnames.com,127.0.0.1,68.183.187.150,unk
DNS-reply,Aug 5 11:59:58,resolver,A,A,57600,d.ntpns.org,127.0.0.1,86.109.15.15,unk

@Gertjan said in pfBlockerNG not logging anything by default?:

Without details, set your system to, use 192.168.1.1 = pfSense, and you'll be good.

I did that but it hasn't changed anything. This was a default Ubuntu install and it has something to do with systemd-resolve but I can't figure it out myself.

@Gertjan said in pfBlockerNG not logging anything by default?:

You saw the name of the system process, : is "systemd-resolve" a resolver ? If so, then your Ubuntu totally bypasses the pfSense resolver (and pfBlockerng) . This means that DNS requests made by your Unbuntu are being handled by Ubuntus own resolver.

But why do I see stuff being resolved in pfblockerNG if it should be bypassed?

[rasputinthegreatest]

I am seeing all these strange things resolve in pfblockerNG like

devmachine-FKcElwG.local
hometheater-wadq2.local

Why am I seeing this? Does this mean my network is compromised?

[rasputinthegreatest]

The situation is getting worse. I now see alot of strange stuff from 127.0.0.1

DNS-reply,Aug 6 09:10:26,resolver,A,A,299,fueled.byhamsters.net,127.0.0.1,69.65.50.223,unk

Alienvault says Suspicious Dynamic DNS Update Request
https://otx.alienvault.com/indicator/ip/69.65.50.223

Also I see this. Constantly newly named .local adresses despite having blocked port 5353 on the firewall.

devmachine-FKcElwG.local
mypc-DogOjT5.local
desktop-ZmWfGXFW.local
desktop-A5k217Qu.local
hometheater-WADQ2.local
hometheater-tQNIYv.local
hometheater-ejsl1t.local
surveillance-GanzOF.local
mediacenter-VAY4Bk.local

I don't see any of these things in the Status -> DNS Resolver nor in any active states on my firewall.
Its very mysterious and I only see this now with pfblockerNG. My work computer but also my private laptop made some of these DNS requests or just picked up some broadcast? But most of the stuff I see originates from 127.0.0.1. All these names seem so randomly generated but the surveillance part makes me extra worried. Or are the DNSBL lists generating them somehow?

Any help is appreciated since it is unnerving me.

EDIT: I found this which seems to be somewhat related https://serverfault.com/questions/1053970/weird-wpad-dns-queries-anyone-seen-this

[Gertjan]

@rasputinthegreatest said in pfBlockerNG not logging anything by default?:

This IP does exist on my LAN but why it resolves some weird random desktop-sdshdsd.local?

Then it's time to visit that device "192.168.1.85", and inspect it.
pfSense was just replies on a DNS request coming from it.
Loads of DNS request is 'normal' these days.

Btw : buy yourself a big collection of connected devices (preference : 'foreign origin") and you wind up with loads of bizarre DNS requests.
For example, a classic "Windows 11 Home" PC is already considered as 'bloated', which means that the list of all these xbox, candy store and other 'essential' processes is quiet big? And they all call 'home'.
And ask yourself this question : "do you really know what users actually do with their devices" ?

@rasputinthegreatest said in pfBlockerNG not logging anything by default?:

Also no 192.168.51.5 exists on my network either

Is "192.168.51.5" a typo ? It doesn't show up in any logs ...
If your pfSense LAN uses the 192168.1.1/24 network, and a device connected to that LAN using the 192.168.51.5, it can't communicate.
A network with statically assigned IP info (IP, mask/network, gateways and DNS) is hard to manage. That's why DHCP was invented, and activated by default for every device you buy.

@rasputinthegreatest said in pfBlockerNG not logging anything by default?:

I assume it is related to time servers?

Why do you presume that ?
Look them up and you'll see.

"ntpns.org" is probably the NS server of ntp.org

A lot of devices want to know the exact time.
Even when DHCP can propose a time server - you can set up pfSense as a time server for your LAN devices - many devices will disregard this info, an insist in using their own hard coded time server source.
For example, a Microsoft PC will default to time.microsoft.com, but you can set it to 192.168.1.1 or pfsense.your-sense-domaine.tld (which will point to 192.168.1.1 = pfSense).
You could to do this for every LAN device.

@rasputinthegreatest said in pfBlockerNG not logging anything by default?:

.local addresses

What is your pfSense domain set to ?

@rasputinthegreatest said in pfBlockerNG not logging anything by default?:

Its very mysterious and I only see this now with pfblockerNG.

Set : Services > DNS Resolver > Advanced Settings : Log Level to :

and save, apply.
Now have a loo here : Status > System Logs > System > DNS Resolver

or better : console :

tail -f /var/log/resolver.log

Don't forget to set back the Log Level to 1 !! ( !! ) as the resolver.log will get very big very fast.

Conclusion : there is a lot of DNS traffic. These are all small packets, and finally just a small percentage of the total traffic.

[rasputinthegreatest]

@Gertjan said in pfBlockerNG not logging anything by default?:

Is "192.168.51.5" a typo ? It doesn't show up in any logs .

DNS-reply,Aug 5 10:39:03,local,PTR,PTR,Unk,5.51.168.192.in-addr.arpa,192.168.1.86,NXDOMAIN,unk

It does but with reverse DNS

This all seems to happen since changing to Unbound Python mode. Or has a Hacker created a subnet? I can't see anything in pfsense related to that subnet or those domains being looked up. I also see for the first time in my firewall logs the information next to WAN saying "Direction is out". Never saw this before. I feel like something opened up since installing pfblockerNG .
I am the only one using the devices behind pfsense. Its just a work computer and a laptop. Both create these weird DNS requests to hometheater-%RANDOMSTRING%.local for example. But its mostly my work computer doing these lookups

@Gertjan said in pfBlockerNG not logging anything by default?:

What is your pfSense domain set to ?

mypfsense.arpa not even .local. But I see these logged by pfblockerNG with "local.home.arpa"

AAAA,AAAA,Unk,hometheater-wadq2.local.home.arpa,127.0.0.1,ServFail,unk

I just don't understand all these domains and they sound sus if you take a look:

devmachine-FKcElwG.local
mypc-DogOjT5.local
desktop-ZmWfGXFW.local
desktop-A5k217Qu.local
hometheater-WADQ2.local
hometheater-tQNIYv.local
hometheater-ejsl1t.local
surveillance-GanzOF.local
fileshare-7JksiB.local
mediacenter-VAY4Bk.local

Can this just be randomly generated with no purpose? I tried packet captures of DNS traffic and these things dont show up there since they often orginate from 127.0.0.1

Or could it come from the ISP router in front of my pfsense? But it should block mDNS already afaik and even after blocking port 5353 I still see these .local things.

EDIT: Found something by @johnpoz here
https://forum.netgate.com/topic/146509/strange-dns-queries-from-pfsense/11
But the strings are much more random and less concrete in his example with gibberish.local.lan

[rasputinthegreatest]

So something showed up again and the Unbound log shows nothing useful. No IP or who requested it. I guess the log level is not enough?

Aug  6 11:40:26 mypfsense unbound[24282]: [24282:0] debug: worker request: max UDP reply size modified (1472 to max-udp-size)
Aug  6 11:40:28 mypfsense unbound[24282]: [24282:0] debug: validator[module 1] operate: extstate:module_state_initial event:module_event_pass
Aug  6 11:40:28 mypfsense unbound[24282]: [24282:0] info: validator operate: query networkhub-Hfl1Jc.local. A IN
Aug  6 11:40:28 mypfsense unbound[24282]: [24282:0] debug: iterator[module 2] operate: extstate:module_state_initial event:module_event_pass
Aug  6 11:40:28 mypfsense unbound[24282]: [24282:0] info: resolving networkhub-Hfl1Jc.local. A IN
Aug  6 11:40:28 mypfsense unbound[24282]: [24282:0] info: finishing processing for networkhub-Hfl1Jc.local. A IN
Aug  6 11:40:28 mypfsense unbound[24282]: [24282:0] debug: validator[module 1] operate: extstate:module_wait_module event:module_event_moddone
Aug  6 11:40:28 mypfsense unbound[24282]: [24282:0] info: validator operate: query networkhub-Hfl1Jc.local. A IN
Aug  6 11:40:28 mypfsense unbound[24282]: [24282:0] info: validate(nxdomain): sec_status_secure
Aug  6 11:40:28 mypfsense unbound[24282]: [24282:0] info: validation success networkhub-Hfl1Jc.local. A IN
Aug  6 11:40:28 mypfsense unbound[24282]: [24282:0] debug: cache memory msg=124942 rrset=239262 infra=87934 val=85965
Aug  6 11:40:58 mypfsense unbound[24282]: [24282:1] debug: validator[module 1] operate: extstate:module_state_initial event:module_event_pass

Now i saw this with log level 2. Very little information still. I don't know what is being resolved here and why.

Aug  6 12:48:34 mypfsense unbound[35444]: [35444:3] info: resolving desktop-Am6uk.local. A IN
Aug  6 12:48:34 mypfsense unbound[35444]: [35444:3] info: validate(nxdomain): sec_status_secure
Aug  6 12:48:34 mypfsense unbound[35444]: [35444:3] info: validation success desktop-Am6uk.local. A IN

[rasputinthegreatest]

Now i saw this with log level 2. Very little information still. I don't know what is being resolved here and why. I have found a correlation with my firewall in that moment. I see port 5353 being blocked by my user rule but also see port 5335 being blocked by a default rule

Aug  6 12:48:34 mypfsense unbound[35444]: [35444:3] info: resolving desktop-Am6uk.local. A IN
Aug  6 12:48:34 mypfsense unbound[35444]: [35444:3] info: validate(nxdomain): sec_status_secure
Aug  6 12:48:34 mypfsense unbound[35444]: [35444:3] info: validation success desktop-Am6uk.local. A IN

Is Unbound using port 5335? Would this be helpful to dig deeper?

[Gertjan]

@rasputinthegreatest said in pfBlockerNG not logging anything by default?:

It does but with reverse DNS

No.
It's :

@rasputinthegreatest said in pfBlockerNG not logging anything by default?:

192.168.1.86

asking for the reverse (see the "PTR,PTR" indication) of

5.51.168.192.in-addr

@rasputinthegreatest said in pfBlockerNG not logging anything by default?:

This all seems to happen since changing to Unbound Python mode

Unbound didn't change.
When you activate 'python mode' - see the config file /var/unbound/unbound.conf, last 3 lines - you tell unbound that it should activate the Python extension of unbound. "Python" is what unbound uses to communicate with external modules (also called addons, or extensions etc). pfb_unbound.py is such an extension, and is present with pfBlockerng for faster integration.
This "pfb_unbound.py" is used by pfBockerng so it can sneak peak what DNS requests are handled for stats purposs, what to block, etc.

@rasputinthegreatest said in pfBlockerNG not logging anything by default?:

devmachine-FKcElwG.local
mypc-DogOjT5.local
desktop-ZmWfGXFW.local
desktop-A5k217Qu.local
hometheater-WADQ2.local
hometheater-tQNIYv.local
hometheater-ejsl1t.local
surveillance-GanzOF.local
fileshare-7JksiB.local
mediacenter-VAY4Bk.local

I think ( ) that these have to do with Avahi. And you use (you know why ?) Avahi on your Ubuntu .... I could be wrong of course.

@rasputinthegreatest said in pfBlockerNG not logging anything by default?:

Or could it come from the ISP router in front of my pfsense?

No.
Look at your WAN firewall rule. Normally, there are .... none !
So, the default firewall behavior applies : No traffic initiated on the pfSense WAN side can enter.

@rasputinthegreatest said in pfBlockerNG not logging anything by default?:

Now i saw this with log level 2

That's why I proposed '3'.
Don't forget to revert it.

And keep in mind : pfSense => Unbound (and thus pfBlockerng) only see DNS traffic that is received by unbound.
Devices on LAN(s) that ask DNS info from other DNS servers like 8.8.8.8 - their requests will never show up under unbound/pfBlockerng.