Let's Encypt support

firewalluser

@pwnd28:

Nobody realy knows if the CA you use is trustfull or has a connection to the government or an other party.

Best practice is to generate the private key you wish to use for a certificate locally on an uncompromised machine with a cryptographically secure random number generator. In this scenario the security of the private key is entirely in your hands because the Certificate Signing Request sent to the CA does not contain the private key.

Thats the rub, even if you had an uncompromised machine so many zero days make it possible to obtain such things so if you ever get something like this in your bios http://blog.trendmicro.com/trendlabs-security-intelligence/hacking-team-uses-uefi-bios-rootkit-to-keep-rcs-9-agent-in-target-systems/ well you might just as well throw your system in the bin.

Edit. I'll chuck this link in as its useful which might be of interest. http://www.uefi.org/sites/default/files/resources/UEFI_Secure_Boot_in_Modern_Computer_Security_Solutions_2013.pdf

@johnpoz:

I see no point to support of this on pfsense to be honest.. Other than maybe captive portal. For the webgui to admin pfsense.. Just use CA on pfsense to create a cert and trust it on your machines you will admin pfsense from. This really should be a really small list of machines!!

I'm no longer using any encryption to access devices or services lan side as I cant inspect the data, any encryption found can be blocked by snort/suricata and investigated. Things like web access to secure websites now take place on a separate device from a linux live cd with no hard drive or other forms of storage and an easily flashable bios.

As to accessing pfsense, switches etc, as above but usernames/password are locally stored so no radius servers for convenience, as its all about minimising the risk of unknowns or to use a more popular phrase, zero days.

If your so cheap to not want to pay for your ssl.. Just don't bother doing your captive portal via https - or use self signed and deploy that to your users of your captive portal on the your going to have anyway on the http url for the captive portal.

Its not so much about being cheap, but trusting the other entities in the supply chain, as it is we have to trust so many people already, reducing that risk just makes sense, which is why we dont trust some people to do some things for us. Others we have to trust when we are incapable of doing something, but where possible its better to do what you can where possible.

johnpoz

@NOYB:

Let's Encrypt cert is eventually good for as long as the automation runs.

And how often does it look to update? Every day? What if goes to update day before the cert runs out and fails to update for whatever reason - issue on their end, firewall problem on your end, etc.

I don't see the automated updating of ssl to be a good thing to be honest. While I can see this useful on say personal site on some webhost for more users to start using https for their sites. I just do not really see a need off pfsense.. Its a firewall not a WEB SERVER.. Using some automated process to use https for your webgui just seems silly. There should be what a handful of people accessing a firewall gui in the first place.. So why not just issue your own self signed and have those machines used to access it trust the CA that is completely under your control.

Now if you want to use it on your web server behind pfsense - have at it.. I will prob use this on some of my play systems.. Just don't see need/use on my firewall at all.. Especially when that firewall system has a CA..

NOYB

John,

Please go read up on the subject before acting like an expert.

stanthewizard

I think too a package would be very useful especially when you use squid reverse proxy with Apache and Exchange.

:)

fourseasons

I wanted to open a new thread on this but found this one just before posting. ::)

–-

Let's encrypt is a new CA that will begin signing free trusted certificates to the public on 3.12.2015.

The project is founded by the likes of of Mozilla, Akamai, Cisco and the EFF who work together in the Internet Security Research Group (ISRG). [1]

The "catch" is that the certificates have a lifetime of 90 days. Their reasoning behind this is that they want to limit damage from key compromises and they want to encourage automation, which I think makes sense. [2]

These free certificates would be perfect for some pfsense applications like the captive portal or the pfsense web interface.
From what I can tell it has already been implemented in python or javascript so it should run on FreeBSD.

[1] https://en.wikipedia.org/wiki/Internet_Security_Research_Group
[2] https://letsencrypt.org/2015/11/09/why-90-days.html

pwnd28

@fourseasons:

I wanted to open a new thread on this but found this one just before posting. ::)

–-

Let's encrypt is a new CA that will begin signing free trusted certificates to the public on 3.12.2015.

The project is founded by the likes of of Mozilla, Akamai, Cisco and the EFF who work together in the Internet Security Research Group (ISRG). [1]

The "catch" is that the certificates have a lifetime of 90 days. Their reasoning behind this is that they want to limit damage from key compromises and they want to encourage automation, which I think makes sense. [2]

These free certificates would be perfect for some pfsense applications like the captive portal or the pfsense web interface.
From what I can tell it has already been implemented in python or javascript so it should run on FreeBSD.

[1] https://en.wikipedia.org/wiki/Internet_Security_Research_Group
[2] https://letsencrypt.org/2015/11/09/why-90-days.html

That sounds good. I think i will try to chnage my pfsense to the letsencrypt ca in the christmas hollidys.
i will post my experiences :)

johnpoz

NOYB.. And in what point did I say I was an expert? And at what point did I sound like one.. Please explain to me why a FIREWALL with limited access to its webgui by only ADMINS that has its own built in CA already would need/want and automated system to install a cert that expires every 90 days if it can not phone home..

I just do not get it?? I have a cert on my web gui, took all of 2 seconds to create and trust from my different machines I admin pfsense from..

I mentioned already that it might be a good idea for something like captive portal as well.

singerie

The project is now in public beta.

It seems to be supported on freebsd :

https://letsencrypt.readthedocs.org/en/latest/contributing.html#freebsd

https://letsencrypt.readthedocs.org/en/latest/using.html#installation-and-usage

filnko

gonzopancho mentioned on reddit that there will be a let's encrypt package in 2.4 ;D

singerie

Package is there in the nightly, but i don't know how to use it … lol

jimp

@singerie:

Package is there in the nightly, but i don't know how to use it … lol

It depends on what you want to do with it. For the GUI:

Visit keys tab, make a new entry, click the button to generate a new account key, then click the button to register the key, then save.

Visit the certs tab, make a new cert, enter a hostname and setup a challenge/response method in the SAN list (pick a method, click +, enter the details), then save, then click issue/renew.

What you can use for the challenge depends on what you have available. If your DNS provider for your domain is listed you can probably use one of the DNS update methods, or if your server supports RFC2136 you could setup keys for the TXT records it wants to make and use the nsupdate option (this is what I prefer to do).

I would advise against attempting the webroot method directly on the firewall. You could port forward port 80 on the firewall's WAN address to a local web server and then use the webroot FTP option perhaps if you don't have any other choice.

Once you have managed to get a cert issued, go to System > Advanced, pick it for the GUI cert. Edit the cert entry in the ACME package and setup a new action for a shell command to run /etc/rc.restart_webgui, save again. Visit the general settings tab and check the box, then save.

If you want to use it for something other than the GUI, repeat the process but pick it wherever you need to use it instead (e.g. haproxy), though your update method may vary for that.

I'll write up a more thorough doc on it eventually.

moscato359

@KOM:

90 days?? Geez, why waste time with that when you can get a freebie from StartSSL that's good for a year.

The let's encrypt script can be put on cron, and automate every 90 days with a new cert.

It's done regularly on linux webservers.

mandrekogmail.com

@KOM:

90 days?? Geez, why waste time with that when you can get a freebie from StartSSL that's good for a year.

One reason may be that the newest version of Google Chrome is no longer trusting StartSSL, due to their parent company doing some shady things.

yodaphone

@jimp:

@singerie:

Package is there in the nightly, but i don't know how to use it … lol

It depends on what you want to do with it. For the GUI:

Visit keys tab, make a new entry, click the button to generate a new account key, then click the button to register the key, then save.

Visit the certs tab, make a new cert, enter a hostname and setup a challenge/response method in the SAN list (pick a method, click +, enter the details), then save, then click issue/renew.

What you can use for the challenge depends on what you have available. If your DNS provider for your domain is listed you can probably use one of the DNS update methods, or if your server supports RFC2136 you could setup keys for the TXT records it wants to make and use the nsupdate option (this is what I prefer to do).

I would advise against attempting the webroot method directly on the firewall. You could port forward port 80 on the firewall's WAN address to a local web server and then use the webroot FTP option perhaps if you don't have any other choice.

Once you have managed to get a cert issued, go to System > Advanced, pick it for the GUI cert. Edit the cert entry in the ACME package and setup a new action for a shell command to run /etc/rc.restart_webgui, save again. Visit the general settings tab and check the box, then save.

If you want to use it for something other than the GUI, repeat the process but pick it wherever you need to use it instead (e.g. haproxy), though your update method may vary for that.

I'll write up a more thorough doc on it eventually.

awesome.. i had my dns with namecheap & wasnt able to figure out how to do NSUpdate with them. so moved it to cloudflare & it worked.

If you use cloudflare make sure the dns uses cloudflare DNS only & has a grey cloud. Grey Cloud: Records that display a grey cloud icon will bypass Cloudflare, using only Cloudflare DNS

if you have an orange cloud the auth fails. you can re-enable it after the cert is issued

doktornotor

If someone really insists on using a local webroot.

1/ Install HAproxy package.
2/ Put this to HAProxy > Files (Type - Lua script, Name: acme-http01-webroot.lua)

(or download from here)


-- ACME http-01 domain validation plugin for Haproxy 1.6+
-- copyright (C) 2015 Jan Broer
--

acme = {}
acme.version = "0.1.1"

--
-- Configuration
--
-- When HAProxy is *not* configured with the 'chroot' option you must set an absolute path here and pass 
-- that as 'webroot-path' to the letsencrypt client

acme.conf = {
	["non_chroot_webroot"] = ""
}

--
-- Startup
--  
acme.startup = function()
	core.Info("[acme] http-01 plugin v" .. acme.version);
end

--
-- ACME http-01 validation endpoint
--
acme.http01 = function(applet)
	local response = ""
	local reqPath = applet.path
	local src = applet.sf:src()
	local token = reqPath:match( ".+/(.*)$" )

	if token then
		token = sanitizeToken(token)
	end

	if (token == nil or token == '') then
		response = "bad request\n"
		applet:set_status(400)
		core.Warning("[acme] malformed request (client-ip: " .. tostring(src) .. ")")
	else
		auth = getKeyAuth(token)
		if (auth:len() >= 1) then
			response = auth .. "\n"
			applet:set_status(200)
			core.Info("[acme] served http-01 token: " .. token .. " (client-ip: " .. tostring(src) .. ")")
		else
			response = "resource not found\n"
			applet:set_status(404)
			core.Warning("[acme] http-01 token not found: " .. token .. " (client-ip: " .. tostring(src) .. ")")
		end
	end

	applet:add_header("Server", "haproxy/acme-http01-authenticator")
	applet:add_header("Content-Length", string.len(response))
	applet:add_header("Content-Type", "text/plain")
	applet:start_response()
	applet:send(response)
end

--
-- strip chars that are not in the URL-safe Base64 alphabet
-- see https://github.com/letsencrypt/acme-spec/blob/master/draft-barnes-acme.md
--
function sanitizeToken(token)
	_strip="[^%a%d%+%-%_=]"
	token = token:gsub(_strip,'')
	return token
end

--
-- get key auth from token file
--
function getKeyAuth(token)
        local keyAuth = ""
        local path = acme.conf.non_chroot_webroot .. "/.well-known/acme-challenge/" .. token
        local f = io.open(path, "rb")
        if f ~= nil then
                keyAuth = f:read("*all")
                f:close()
        end
        return keyAuth
end

core.register_init(acme.startup)
core.register_service("acme-http01", "http", acme.http01)

3/ Create a very simple http frontend on WAN address, port 80.

4/ Use this for your certificate(s) in ACME package:

[EDIT: The image host originally used in this post is dead. Fixed using cached copies of the images on another host -jimp]

reggie14

Is there any chance that this will work with Google Domain's DNS? It doesn't look Google provides a way to create txt records using their Dynamic DNS API.

Tentacruel

@jimp:

What you can use for the challenge depends on what you have available. If your DNS provider for your domain is listed you can probably use one of the DNS update methods, or if your server supports RFC2136 you could setup keys for the TXT records it wants to make and use the nsupdate option (this is what I prefer to do)..

I've been trying to get the manual method to work with he.net, but can't figure out how to generate the TXT key - While I know I need to add it manually to my DNS, is the generation of the key included in your package or is there a manual step required here?

/SJ

jimp

@Tentacruel:

@jimp:

What you can use for the challenge depends on what you have available. If your DNS provider for your domain is listed you can probably use one of the DNS update methods, or if your server supports RFC2136 you could setup keys for the TXT records it wants to make and use the nsupdate option (this is what I prefer to do)..

I've been trying to get the manual method to work with he.net, but can't figure out how to generate the TXT key - While I know I need to add it manually to my DNS, is the generation of the key included in your package or is there a manual step required here?

/SJ

That was the first method I tested. Define the domain name entry and then click issue/renew. In the green output it tells you what the content of the record should be. Add it to DNS and then wait 2-3 minutes to be sure the record is available, then click issue/renew again.

execcr

Hello,
new user here. Fresh pfsense install update to 2.3.2_1
I've installed the acme package but i have some problems with Route 53 Dns validation
The output say that:

[Mon Feb 6 17:24:12 CET 2017] Registering account
[Mon Feb 6 17:24:13 CET 2017] Already registered
[Mon Feb 6 17:24:14 CET 2017] Update success.
[Mon Feb 6 17:24:14 CET 2017] Single domain='test.sanitazedomain.it'
[Mon Feb 6 17:24:14 CET 2017] Getting domain auth token for each domain
[Mon Feb 6 17:24:14 CET 2017] Getting webroot for domain='test.sanitazedomain.it'
[Mon Feb 6 17:24:14 CET 2017] _w='dns_aws'
[Mon Feb 6 17:24:14 CET 2017] Getting new-authz for domain='test.sanitazedomain.it'
[Mon Feb 6 17:24:15 CET 2017] The new-authz request is ok.
[Mon Feb 6 17:24:16 CET 2017] Found domain api file: /usr/local/pkg/acme/dnsapi/dns_aws.sh
[color][Mon Feb 6 17:24:18 CET 2017] Error add txt for domain:_acme-challenge.test.sanitazedomain.it[/color]
[Mon Feb 6 17:24:18 CET 2017] Please check log file for more details: /tmp/acme/test/acme_issuecert.log

i checked the log and seem to fail at curl command to retriete http.header.
If i open HTTP.HEADER file in the acme domain folder (test in this case) i get:

HTTP/1.1 505 HTTP Version not supported
Date: Mon, 06 Feb 17 16:24:18 GMT
Connection: close
x-amz-id-2: 1rjTvEvOKQpJ5zruKVbddXvS15q4+I1y/+r2qirC9S8MYXm1esOQYwkOscLruZW8zzvK0+WY8BOQiy8GvYMu0rx0Uwq8WqlH
x-amz-request-id: 8B82C340F9CA158D
Content-Length: 0

any hint? Aws access ID and secret key seems ok. I've tried also to get full access to this IAM user to Route53

jimp

Route53 made some change to their service in the last few days that might have broken this client. We've had at least one other report of Route53 dyndns not working in general (not related to acme). Odds are the route53 script needs updated to match their new API/methods.