Grafana Dashboard using Telegraf with additional plugins

bigjohns97

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Doboy

@victorrobellini Any idea why I still have this error when trying to execute the gateways script from the telegraf conf file?

[inputs.exec] Error in plugin: exec: fork/exec /usr/local/bin/gateways.py: no such file or directory for command '/usr/local/bin/gateways.py':

I have checked the permissions on the script file and it's set to 0555, no weird characters in the script and when I run the file from CLI I get proper behavior.

[2.4.5-RELEASE][admin@******]/root: /usr/local/bin/python3.7 /usr/local/bin/gateways.py
gateways,gateway_name=WAN_DHCP rtt=769.0,rttsd=562.0,loss=0i

I'm on pfsense 2.4.5 and latest telegraf, rest of settings in telegraf working fine.

Doboy

@doboy So turns out I had to use the full path + script in telegraf conf file

commands = [ "/usr/local/bin/python3.7 /usr/local/bin/gateways.py" ]

ddbnj

@victorrobellini

Thank you, you have created a great addition to pfsense and grafana.

I am trying to create an alert using your dashboard but I cannot find any way to edit a WAN2 panel. Is there a way to copy a panel so I can modify it to add an alert? The specific alert is to notify me if WAN_LTE throughput exceeds some threshold. The other grafana panels (WAN) have an edit and duplicate options but I can't find the option on the second WAN option. Weird right?

Thank you,

Devan

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VictorRobellini

@ddbnj said in Grafana Dashboard using Telegraf with additional plugins:

The other grafana panels (WAN) have an edit and duplicate options

My guess is that you are going to have to disable duplicate for the WAN panel. Then make a copy of it and hard code it to "WAN2". An easier option may be to copy it to a new custom dashboard that has only the alerting metrics, otherwise you are going to have to update things in the future if/when I make more changes.

wrightsonm

@VictorRobellini great dashboard. I have it running with the new influx db.

2 small things. The outbound blocked ip list shows the source ip when perhaps both source and dest ips are relevant?

Do you know how to create a view of inbound blocked traffic grouped by port?

Thanks

VictorRobellini

@wrightsonm said in Grafana Dashboard using Telegraf with additional plugins:

The outbound blocked ip list shows the source ip

On the dashboard, I show I show top 10 blocked IN and Out. For Blocked Out, I show the source because I want to highlight any internal hosts that are making calls to blocked IP addresses.

Do you know how to create a view of inbound blocked traffic grouped by port?

I like the idea. I'll need to make sure dest port is a tag so it's going to require an updated telegraf config and dashboard query. It should be pretty easy.

wrightsonm

@victorrobellini

Ah i see tags are imported via grok using the :tag term.

I haven't quite understood when to use a tag or use a field yet.

The sorts of questions that i'd like to be able to answer from a dashboard with regards to blocking are:

which internal hosts are accessing a blocked resource (already available)
what is the blocked resource ip and on which port?
am i seeing a large number of blocks on a particular port i.e. SSH
are there any trends in the blocked data? common ports, common ips

Questions that I will be looking into answering in the future that will require further data sources are:

high traffic from a particular ip that is not blocked. i.e. an unblocked ip is making a large number of requests to port 443, or has attempted many login attempts to port 22

I noticed on my outbound WAN network traffic chart that there was a periodic (1min) burst of traffic. It would have been interesting to be able to see stats on what that traffic was. - i guess I ought to investiage netflow/sflow for this. I later found out that my Google Mini speaker is the root cause of the periodic traffic. I haven't wiresharked the traffic yet to see what it is actually doing. Something for another day...

wrightsonm

Here are a couple of changes that i've done.

IP-Top 10 Blocked - OUT

Added the Dest IP to the table

SELECT TOP("count","src_ip",10),dest_ip FROM (SELECT count("action") FROM "autogen"."tail_ip_block_log" WHERE ("host" =~ /^$Host$/ AND "action" = 'block' AND "direction" = 'out') AND $timeFilter GROUP BY "src_ip","dest_ip")

Changed src_port and dest_port in conf to tags. Copied IP - Top 10 Blocked IN chart and changed the query to:

SELECT TOP("count","dest_port",10) FROM (SELECT count("action") FROM "autogen"."tail_ip_block_log" WHERE ("host" =~ /^$Host$/ AND "action" = 'block' AND "direction" = 'in') AND $timeFilter GROUP BY "dest_port")

Historic data will appear with a null port in this view. new data will show the correct dest port.

VictorRobellini

@wrightsonm
I think ntop or softflowd would probably be a good approach. There are telegraf plugins to capture flow data but building all the graphs and managing the huge volume of data that would fill the influxDB make ntop a much better solution.

wrightsonm

I've spent some time today trying out ntopng. Next week i'll look into integrating it into grafana. Whilst there is an ntopng plugin for grafana, the recommended route appears to use Influxdb.
i.e. https://www.ntop.org/ntop/ntopng-influxdb-and-grafana-a-step-by-step-guide-to-create-dashboards/

Another small change i've made to the dashboard is to add data links on urls.

On the IP - Top 10 Blocked - IN view, in the table overrides section, I have added this data link:

Title: Show in GreyNoise
URL: https://viz.greynoise.io/query/?gnql=${__value.raw}
Open In New tab: yes

The result is a link to a page like this:

https://viz.greynoise.io/query/?gnql=125.88.169.233
Summary: Location China, Classification Malicious, Top Tags: SSH Worm.

SeaMonkey

I'm running on 1.6.0 and most features of the dashboard work, but strangely, 'Physical address' doesn't pull correctly. On physical interfaces, it just shows 'DOWN'. However, if I explore the InfluxDB in Chronograf, under pfsense.autogen|mac_address I see the correct mac addresses for both of my physical interfaces.

edit
Even directly on the dashboard, if I select 'Interface Summary' | 'Explore' it shows the physical addresses correctly on the table there.

SeaMonkey

Update: My problem stems from the 'Value mapping' intended for the 'Status' column. It is being applied to all fields, thereby changing my 'Physical addresses' to 'DOWN', presumably because the MAC addresses start with 0.

Update 2: The solution was to add an override, Filter by Field, Physical Address, Value mappings. Leaving it empty overrides the default value mapping. However, this is kind of a backwards approach, since this value mapping should only be applied to the Status field in the first place, so it should be defined as an override specifically for the Status field as opposed to the entire panel.

VictorRobellini

@seamonkey said in Grafana Dashboard using Telegraf with additional plugins:

The solution was to add an override

What version of Grafana are you using? Check out the Github page to see compatible versions

VictorRobellini

@wrightsonm

This is as granular as you can really get with the data collected from pfblocker. You could go deeper, but I don't think it would provide any real value. The blank borders around the DNSBL stuff really bug me!

wrightsonm

@victorrobellini

Nice work there. I think you have a typo on one of the charts on the left hand side

IP-Top 10 Blocked - OUT (By Host/Protocol) should read IN.

You could probably layout the objects in a different way to end up with less black space in the bottom left /right. Hard to visualise off the top of my head. You might find the layout might work better in columns. i.e. IP - Top 10 Block - * is 3 items in a row. perhaps pivoting it all to be vertical may work better?

To use up the free space, one thing that could be useful is a variation on the blocked packet stats graph. You could create stacked bar charts grouped by ip. This would give a visual indication of the proportion of traffic that is coming from one of your internal devices that is being blocked for outbound, and for inbound would visually highlight when a particular ip is attacking you.

What do you think to my suggestion above about hyperlinking the public ip's to greynoise.io? Or another alternative? Maybe could put the url fragment in a variable so people can pick their favourite ip analysis website?

SeaMonkey

@victorrobellini 7.1.1, but I wouldn't think that would make a difference regarding my particular issue. Your design applies the value mapping function to all fields within the panel, but instead it should only be applied to the Status column exclusively under the Override settings. I've fixed this on my own dashboard and I started to attempt a pull request to fix it, but didn't have the patience to manually adjust only the relevant lines in your JSON file and reimport for testing.

VictorRobellini

I made a few updates to the plugins, telegraf config, and the dashboard.

More gateway details
More pfBlocker details (in a separate panel so you can hide it if you don't care)

Screenshot to be updated

wrightsonm

@victorrobellini exciting. I look forward to the screenshot / git commit.

VictorRobellini

@wrightsonm

Screenshot updated. The only thing I need to figure out is what to put in the pfSense Details blank space. Adding graphs for the sake of filling space means unnecessary influx queries and CPU usage on the host. I'm running my influx on a J5005 with a bunch of other services. I'll deal with the blank space for now.

I added the extra pfBlocker details to its own panel so it can be collapsed if it's not used.