Unbound unbound_manager (Manager/Installer utility for unbound - Recursive DNS Server)

Martineau · Apr 19, 2020

ugandy said:
thanks!
is there a size limit to /opt/var/lib/unbound/unbound.log ?

No, - there is no housekeeping performed on 'opt/var/lib/unbound/unbound.log' hence in 'Easy' menu mode, during the install it states on the screen 'NO recommended' to prevent the log silently filling the disk.

However, if you enable 'scribe' (syslog-ng) logging, then you can manage the unbound log using 'logrotate'.

Martineau · Apr 19, 2020

ugandy said:
vpn starts correctly using my vpn client 2, with command "unbound_manager vpn=2"

but then when i do "?"

i see

[✔] unbound requests via VPN Client 1 (10.119.174.30) tunnel ENABLED

the IP is correctly set to the IP of my client2, but the message says client is "1"

is it because client array starts at position zero? so client 2 is ID=1?

The script usesthe command format, so if you isse the command what VPN ID is returned?

Code:

ip route | grep "10.119.174.30" |  awk '{print substr_($3,4,1) }'

EDIT: Remove the '_' character as the 'awk' command above is blocked

ugandy · Apr 19, 2020

Martineau said:
No, - there is no housekeeping performed on 'opt/var/lib/unbound/unbound.log' hence in 'Easy' menu mode, during the install it states on the screen 'NO recommended' to prevent the log silently filling the disk.

However, if you enable 'scribe' (syslog-ng) logging, then you can manage the unbound log using 'logrotate'.

thanks!

ugandy · Apr 19, 2020

Martineau said:
The script usesthe command format, so if you isse the command what VPN ID is returned?

Code:

ip route | grep "10.119.174.30" | awk '{print substr_($3,4,1) }'

EDIT: Remove the '_' character as the 'awk' command above is blocked

cromo@RT-AX88U-8158:/tmp/home/root# ip route | grep "10.119.174.63"
10.119.174.0/23 dev tun12 proto kernel scope link src 10.119.174.63
cromo@RT-AX88U-8158:/tmp/home/root# ip route | grep "10.119.174.63"|awk '{print substr_($3,4,1) }'
1
cromo@RT-AX88U-8158:/tmp/home/root#

this is for my vpnclient2 (which i'm using on unbound)

Martineau · Apr 19, 2020

ugandy said:
cromo@RT-AX88U-8158:/tmp/home/root# ip route | grep "10.119.174.63"
10.119.174.0/23 dev tun12 proto kernel scope link src 10.119.174.63
cromo@RT-AX88U-8158:/tmp/home/root# ip route | grep "10.119.174.63"|awk '{print substr_($3,4,1) }'
1
cromo@RT-AX88U-8158:/tmp/home/root#

this is for my vpnclient2 (which i'm using on unbound)

Doh… the index should be '5,1'

I'll eventually push a hotfix

ugandy · Apr 19, 2020

Martineau said:
Doh… the index should be '5,1'

I'll eventually push a hotfix

could this be why my vpnclient2-route-up appears to have no effect?
(route-pre-down worked fine)

Martineau · Apr 19, 2020

ugandy said:
could this be why my vpnclient2-route-up appears to have no effect?
(route-pre-down worked fine)

I don't think so as it's only the '?' command that always shows 'VPN 1 (xxx.xxx.xxx.xxx)'

ugandy · Apr 19, 2020

i enabled scribe (via unbound_manager advanced), and have unbound logging enabled, but i don't see any entries in /opt/var/log/unbound.log
is there a delay?

my conf:

#########################################
# integration LOG's
#
verbosity: 1
logfile: "/opt/var/lib/unbound/unbound.log"
log-time-ascii: yes
log-tag-queryreply: yes
log-queries: yes
log-replies: yes
use-syslog: yes
#log-local-actions: yes
log-servfail: yes
#########################################

Martineau · Apr 19, 2020

ugandy said:
i enabled scribe (via unbound_manager advanced), and have unbound logging enabled, but i don't see any entries in /opt/var/log/unbound.log

is there a delay?

Code:

my conf: ######################################### # integration LOG's # verbosity: 1 logfile: "/opt/var/lib/unbound/unbound.log" log-time-ascii: yes log-tag-queryreply: yes log-queries: yes log-replies: yes use-syslog: yes #log-local-actions: yes log-servfail: yes #########################################

There shouldn't be a delay..

Code:

A:Option ==> l

/opt/var/log/unbound.log (syslog-ng)        Press CTRL-C to stop

Apr 19 18:31:06 RT-AC68U unbound: [1013:0] query: 127.0.0.1 ipid.shat.net. A IN
Apr 19 18:31:06 RT-AC68U unbound: [1013:0] query: 127.0.0.1 ipid.shat.net. A IN
Apr 19 18:31:06 RT-AC68U unbound: [1013:0] query: 127.0.0.1 lcprd1.samsungcloudsolution.net. A IN
Apr 19 18:31:06 RT-AC68U unbound: [1013:0] info: lcprd1.samsungcloudsolution.net. always_nxdomain 127.0.0.1@55039 lcprd1.samsungcloudsolution.net. A IN

I'd try another 'rs' command.

ugandy · Apr 19, 2020

Martineau said:
There shouldn't be a delay..

I'd try another 'rs' command.

that did it
thanks!

ugandy · Apr 19, 2020

happened again:
1) cycled the vpn client and got new IP
2) now unbound outgoing-interface has outdated IP in unbound.conf
3) "vpn disable" comments out the outgoing-interface line in the conf file but leaves the ip number there
4) doing vpn =2 uncomments the outgoing-interface line in the conf file but leaves the old IP in place.

feels like starting vpn command, expects to find xxx.xxx.xxx.xxx in the conf file to work properly?
there were no error messages

joe scian · Apr 20, 2020

Code:

Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: [SEND_AMAS_NODE_EVENT:(4684)] ERROR connecting:No such file or directory.
Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: connect error: No such file or directory
Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: [SEND_AMAS_NODE_EVENT:(4684)] ERROR connecting:No such file or directory.
Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: connect error: No such file or directory
Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: [SEND_AMAS_NODE_EVENT:(4684)] ERROR connecting:No such file or directory.
Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: connect error: No such file or directory
Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: [SEND_AMAS_NODE_EVENT:(4684)] ERROR connecting:No such file or directory.
Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: connect error: No such file or directory
Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: [SEND_AMAS_NODE_EVENT:(4684)] ERROR connecting:No such file or directory.
Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: connect error: No such file or directory
Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: [SEND_AMAS_NODE_EVENT:(4684)] ERROR connecting:No such file or directory.
Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: connect error: No such file or directory
Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: [SEND_AMAS_NODE_EVENT:(4684)] ERROR connecting:No such file or directory.
Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: connect

An observation

When Unbound is stopped by Option > x the syslog is flooded with the folowing:-

glehel · Apr 20, 2020

how to check that addresses are being retrieved via vpn? It shows me the ip address given by isp on the dnsleak test. this is normal?

The second question is how many queries the default (AC86U) cache stores and what is the optimal time to store it?

Martineau · Apr 20, 2020

I've uploaded v3.05

Version=3.05
Github md5=c8c7c2b79e368bcc55577108ed7c5798

use 'u' to update when prompted on screen

Use of the 'i = Update unbound Installation' **Not required**

Code:

FIX:      'vpn x' doesn't always apply new VPN gateway IP, nor does it validate VPN Client instance/Gateway IP
CHANGE:   'vx' command will now ask to restart unbound if the config file was edited.

Martineau · Apr 20, 2020

ugandy said:
1) cycled the vpn client and got new IP
2) now unbound outgoing-interface has outdated IP in unbound.conf
3) "vpn disable" comments out the outgoing-interface line in the conf file but leaves the ip number there
4) doing vpn =2 uncomments the outgoing-interface line in the conf file but leaves the old IP in place.
feels like starting vpn command, expects to find xxx.xxx.xxx.xxx in the conf file to work properly?

ugandy said:
3) "vpn disable" comments out the outgoing-interface line in the conf file but leaves the ip number there

By design, no point in removing the previous IP - it's useful as an eye-catcher to prove the function was used previously.

ugandy said:
feels like starting vpn command, expects to find xxx.xxx.xxx.xxx in the conf file to work properly?

Nope, the 2nd word can be any text string.

see post #1554 - hopefully I've fixed your issue.

ugandy · Apr 20, 2020

thanks! will try it.

Martineau · Apr 20, 2020

joe scian said:

Code:

Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: [SEND_AMAS_NODE_EVENT:(4684)] ERROR connecting:No such file or directory.
Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: connect error: No such file or directory
Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: [SEND_AMAS_NODE_EVENT:(4684)] ERROR connecting:No such file or directory.
Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: connect error: No such file or directory
Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: [SEND_AMAS_NODE_EVENT:(4684)] ERROR connecting:No such file or directory.
Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: connect error: No such file or directory
Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: [SEND_AMAS_NODE_EVENT:(4684)] ERROR connecting:No such file or directory.
Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: connect error: No such file or directory
Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: [SEND_AMAS_NODE_EVENT:(4684)] ERROR connecting:No such file or directory.
Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: connect error: No such file or directory
Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: [SEND_AMAS_NODE_EVENT:(4684)] ERROR connecting:No such file or directory.
Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: connect error: No such file or directory
Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: [SEND_AMAS_NODE_EVENT:(4684)] ERROR connecting:No such file or directory.
Apr 20 16:43:13 RT-AC5300-0680 dnsmasq-script[5584]: connect

An observation

When Unbound is stopped by Option > x the syslog is flooded with the folowing:-

see [Release] Asuswrt-Merlin 384.15 (and 384.13_4) are now available

Obviously if you aren't using AiMesh…..

Martineau · Apr 20, 2020

glehel said:
how to check that addresses are being retrieved via vpn? It shows me the ip address given by isp on the dnsleak test. this is normal?

The second question is how many queries the default (AC86U) cache stores and what is the optimal time to store it?

You can see the default cache size with

Code:

e  = Exit Script [?]

A:Option ==> ?

<snip>

 unbound Memory/Cache:

      'key-cache-size:' 8388608 (8.00m)
      'msg-cache-size:' 8388608 (8.00m)
      'rrset-cache-size:' 16777216 (16.00m)

and unfortunately my personal cache.*-TTL values have crept into the default 'unbound.conf'

Code:

grep cache-m /opt/var/lib/unbound/unbound.conf

# v1.08 Martineau - Change  'cache-max-ttl: 21600' and 'cache-min-ttl: 5 to 14400/1200'
cache-max-ttl: 14400                            # v1.08 Martineau
cache-min-ttl: 1200                             # v1.08 Martineau

However, the parameters proposed in this thread doubles the cache sizes and uses custom cache-*-ttl etc, and as the disclaimer says it may not work for non-HND models or even other HND models!

So without knowing individual environments, like all cache-profiling, it depends on how many clients are using it, and the resulting 'churn' rate.

The unbound stats don't show the usage/size of the three cache entities over time (perhaps another opportunity for @juched's Graphical charting skills?

i.e. for the rrset-cache would it be useful to see how much of its 16M is actually in-use say by hour? ...similar to the 3rd graph down on this page

Martineau · Apr 20, 2020

glehel said:
It shows me the ip address given by isp on the dnsleak test.

this is normal?

Think about it...

Q. Who is the DNS server when you are forwarding to an upstream DNS server?....if you are not forwarding DNS requests upstream, who can it possibly be?

glehel said:
How to check that addresses are being retrieved via vpn?

Try this... I could be wrong!

Create the outbound DNS tracker rule

Code:

iptables -I OUTPUT -p udp -m udp --dport 53 -j LOG -m comment --comment "DNS request tracker"

Now wait a while and check for DNS hits (whilst redacting your real WAN IP if found)

EDIT: Changed 'IN=.*DPT=53' to '^.*DPT=53' to preserve timestamps

Code:

iptables  --line -t filter -nvL OUTPUT

WANIP=$(nvram get wan0_ipaddr);grep -o "^.*DPT=53" /tmp/syslog.log | sed -r 's/LEN.*PROTO=//' | sed -r 's/LEN.*PROTO=//' | sed -r "s/$WANIP/wan.isp.ip.addr/"

Now if you route unbound requests via the VPN, then wait a few minutes then check again....

Code:

iptables  --line -t filter -nvL OUTPUT

WANIP=$(nvram get wan0_ipaddr);grep -o "^.*DPT=53" /tmp/syslog.log | sed -r 's/LEN.*PROTO=//' | sed -r 's/LEN.*PROTO=//' | sed -r "s/$WANIP/wan.isp.ip.addr/"

Feel free to post the results....

Any difference?

ugandy · Apr 20, 2020

@Martineau : Sounds that, for folks worried with privacy, and previously using DOT, unbound+vpn is a fair trade, is this a valid statement?
thanks

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