Crowdsec Install guide for cloudron purposes

[rmdes]

@mastadamus this is logical in fact, this is because the firewall bouncer intercept the traffic at the iptable level and stop 99.% of scenarios before traffic even hit the nginx process.

So if you really want to test the nginx bouncer you need to disable the firewall bouncer

[rmdes]

After more testing this is my report and steps to have it running smooth:

• adding crowdsec repo
• apt install crowdsec
• apt install crowdsec-firewall-bouncer-iptables

it should wizard the first init properly and add API keys accordingly, sometimes it seems the 2 services starts before the correct state of the whole crowdsec is correctly setup, so the solution is to (stop both services) make sure the list of follow up to the manual setup are correctly setup, the cscli tool has list, status and other commands to check if everything is fine.

---

I had to tweak crowdsec-firewall-bouncer.yml to this

Docker

I used this approach to get all the containers (acquis.yml)

# Docker context
source : docker
container_name_regexp:
  - ^[a-zA-Z0-9_.-]*$
labels:
  type: log_type
---

I used port 9999 in config.yml and accordingly into
local_api_credentials.yaml
bouncers/crowdsec-firewall-bouncer.yaml
bouncers/crowdsec-nginx-bouncer.conf

If you regenerate a bouncer API you need to make sure the new API is in the bouncer/yml file accordingly.

when everything is fine,

If you see errors in the crowdsec log, it's probably either machine not validated, wrong API number in lapi = crowdsec firewall service not running (main reason why often)

cscli machine list IP address need to be assigned, ortherwise it means the machine is not being used or there is an API issue.

cscli lapi status (success)
cscli capi status (success)
cscli metrics (return data)

install linux/ssh/nginx/docker scenarios using cscli
sudo systemctl enable/start/status crowdsec-firewall-bouncer.service crowdsec.service

need to be healthy active/loaded at all time

---

Metabase

to handle the metabase feature, I simply run it this way:
cscli dashboard setup -l 127.0.0.1 -p 12345 --password YourPassw0rd
keep provided credentials (you can change them when logged)

and then access the frontend first doing on a new terminal
ssh -L 3000:127.0.0.1:12345 user@host

and in the browser : http://localhost:3000

This leaves metabase isolated from the internet and only accessible via SSH

No Metabase

finally if you don't want to mess with having an "outside" cloudron metabase running to have a dashboard locally, just don't use cscli dashboard, if you want to remove it you can just cscli dashboard stop or remove

and then use cscli enroll command to have the crowdsec provided "as a service" dashboard https://app.crowdsec.net

I have 1 machine inactive in this setup because it is the one active on the nginx bouncer that is currently in place but not being used.

[Mastadamus]

@rmdes I tried nginx bouncer BEFORE installing iptables bouncer and it crashed my nginx and wouldn't let me bring it up. I then reverted to previous image and installed iptables bouncer which works great.

[rmdes]

the main consequences I have seen is a drastic drop in all the wordpress (previously using wordfence or else) attacks/prob/vuln scan etc..after a week without these plugins doing anything (the firewall intercept these scenarios before they reach nginx) my wordfence logs are now bots/humans/myself, no more attacks.

it's just brutal since Armada host quite a few domains running wordpress, so basically the surface to attack drop's considerably with crowdsec agent monitoring the door, the Wordpress containers don't even get the bots usually hitting the domains, so I also have seen a drop in CPU/Mem usage overall everywhere, it's now running since 2 weeks without any problem.

I'm sure now that the first issue I had was because of the manual installation at that point in time, for some reason it pulled another version of nginx, but even if you reproduce these steps now, the installation just work fines and if you mess with the agent API, it's really easy to replace the API accordingly, have all the pieces of the YML files correctly configured, make sure systemd service are enabled and started and running and voila !

If you want to go the safe way, just use the Firewall (in fact if you use it, the nginx bouncer is irrelevant) in my experience setting up metabase the way I did is safe and does not impact cloudron in any way that I could see.

[jdaviescoates]

@rmdes that all sounds great. I wonder if Crowdsec could be baked into Cloudron itself?

[rmdes]

@jdaviescoates I know the crowdsec people are working "upstream" with all kinds of actors to get this done for many hosting/implementations out there, in my experience, since both Cloudron and Crowdsec use iptables this integration is already the case, what should be perhaps done is how the cloudron admin activate/onboard from the dashboard or something similar but I'm not sure about the added value since technically, it is integrated in many ways already :

• has a Docker type
• IPtables
• Can plug on any SystemD service to parse logs

what could probably be optimized is how crowdsec "watches" all the docker containers and perhaps make sure the implementation does not disrupt cloudron operations in any way, make it bullet proof install tested.

[klausagnoletti]

@rmdes I am head of community at CrowdSec and we would be happy to work with anyone from the Cloudron community on this. For this purpose it would be a great idea to join our Discord community and talk about it there

[jdaviescoates]

@rmdes said in Crowdsec Install guide for cloudron purposes:

what should be perhaps done is how the cloudron admin activate/onboard from the dashboard or something similar but I'm not sure about the added value since technically, it is integrated in many ways already

That would have massive added value to me.

I wouldn't trust myself to not mess something up doing it manually!

And anything that makes life easier and simpler is welcome. So just having some option in the Cloudron admin that could enable Crowdsec would be ideal.

[rmdes]

@klausagnoletti I'm already there but not a Cloudron dev or anything, but yeah it would be amazing the have the existing metabase cloudron app in "flavors" one could be the default app we have now, another one could bootstrap crowdsec db and be a one click install for the underlying crowdsec installed in the host but I have no idea if it's possible.

[BrutalBirdie]

I am now checking out CrowdSec as well.

As of writing this the installation instruction from @Mastadamus where almost correct.

Edit nginx.conf file to put in default logging

Not needed, also the posted config is bad since it's missing the final closing curly bracket }

---

Everything else worked as described.

---

Now to the bouncer.

@rmdes said in Crowdsec Install guide for cloudron purposes:

So if you really want to test the nginx bouncer you need to disable the firewall bouncer

Ahhh ok, nah I will stick with the iptable bouncer.

[BrutalBirdie]

@rmdes said in Crowdsec Install guide for cloudron purposes:

I had to tweak crowdsec-firewall-bouncer.yml to this

Where? What?

https://docs.crowdsec.net/docs/bouncers/firewall/#configuration
/etc/crowdsec/bouncers/crowdsec-firewall-bouncer.yaml

Ok.

@rmdes said in Crowdsec Install guide for cloudron purposes:

I used this approach to get all the containers (acquis.yml)

Where? What?

https://docs.crowdsec.net/docs/v1.0/acquisitions/format/#acquisition-directives
/etc/crowdsec/acquis.yaml

Ok.

@rmdes said in Crowdsec Install guide for cloudron purposes:

I used port 9999 in config.yml

Where? What?

https://docs.crowdsec.net/docs/configuration/crowdsec_configuration#configuration-directives
/etc/crowdsec/config.yaml

In yaml querry / json qurry format:
yq '.api.server.listen_uri' < /etc/crowdsec/config.yaml
127.0.0.1:8080 this changed to 127.0.0.1:9999 I assume.
Changed to :9999

@rmdes said in Crowdsec Install guide for cloudron purposes:

and accordingly into
local_api_credentials.yaml

Where? What?

https://docs.crowdsec.net/docs/next/local_api/intro/
/etc/crowdsec/local_api_credentials.yaml

In yaml querry langauge:
yq '.url' < /etc/crowdsec/local_api_credentials.yaml
http://127.0.0.1:8080 changed to :9999

@rmdes said in Crowdsec Install guide for cloudron purposes:

bouncers/crowdsec-firewall-bouncer.yaml

Where? What?
https://docs.crowdsec.net/docs/bouncers/firewall/
/etc/crowdsec/bouncers/crowdsec-firewall-bouncer.yaml

yaml querry:
yq '.api_url' < /etc/crowdsec/bouncers/crowdsec-firewall-bouncer.yaml
http://127.0.0.1:8080 changed to :9999

@rmdes said in Crowdsec Install guide for cloudron purposes:

install linux/ssh/nginx/docker scenarios using cscli

What? How?

https://docs.crowdsec.net/docs/v1.1/cscli/cscli_scenarios_install/
cscli scenarios install
Which scenarios can I install?
https://hub.crowdsec.net/browse/

Following your advice:

cscli scenarios install linux
cscli scenarios install sshd
cscli scenarios install nginx

I did not find and scenario for docker? @rmdes and now when I try cscli scenarios install linux I get an error.
Well it seems this are not scenarios but collections.

So it's https://docs.crowdsec.net/docs/v1.2/cscli/cscli_collections_install/

cscli collections install crowdsecurity/linux

Which is already installed by default, which also included sshd by default.

I could not find docker at all.
Maybe you can help out here @rmdes

[BrutalBirdie]

Now I am running crowdsec on my cloudron.
I will report back for more findings.

[necrevistonnezr]

@BrutalBirdie Thanks! It would be great if your, @rmdes and @Mastadamus findings could end up in a Cloudron doc in the end...!

[rmdes]

@BrutalBirdie Sorry have been busy and thanks for documenting my steps

The docker part is done on the /etc/crowdsec/acquis.yml
I'm not entirely convinced my regex call works appropriately
or even that in the cloudron context this is entirely needed (I have one cloudron with & without not seeing much difference)

# Docker context
source : docker
container_name_regexp:
  - ^[a-zA-Z0-9_.-]*$
labels:
  type: log_type
---

[necrevistonnezr]

Revisiting this topic - is Crowdesc running reliably for those who got it installed?

[rmdes]

not anymore, there has been a lot of changes on crowdsec side and not only the crowdsec-firewall-bouncer needs a very specific nginx version but even the wordpress bouncer could not be properly installed last time I checked.

I still have one instance running behind a Cloudflare, a server running cloudron + crowdsec but without the nginx bouncer, just the cloudflare bouncer, but even in this configuration I could not get the wordpress bouncer to work.

[robi]

Should the OP title be changed to reflect all of this is not recommended anymore?

[girish]

@robi good point, I have put a warning up front.