Webstatic

Purpose

This system provides a web server for serving static content. HTTP requests for this system are proxied through Web which also handles TLS termination and redirects from http scheme URLs to https.

Administration

System Administration

Todo

find an additional admin

Application Administration

Application

Administrator(s)

Apache httpd

Jan Dittberner

Additional People

No additional people have access to this machine.

Basics

Physical Location

This system is located in an LXC container on physical machine Infra02.

Logical Location

IP Internet

reverse proxied from Web

IP Intranet

172.16.2.116

IP Internal

10.0.0.116

MAC address

00:ff:67:39:23:f2 (eth0)

See also

See Network

DNS

Name

Type

Content

codedocs.cacert.org.

IN CNAME

web.cacert.org.

funding.cacert.org.

IN CNAME

web.cacert.org.

infradocs.cacert.org.

IN CNAME

web.cacert.org.

webstatic.cacert.org.

IN A

213.154.225.242

webstatic.cacert.org.

IN SSHFP

1 1 30897A7A984D8350495946D54C6374E9331237EF

webstatic.cacert.org.

IN SSHFP

1 2 32BB10C5CF48532D077066E012230058DDF3CCE731C561F228E310EB7A546E3F

webstatic.cacert.org.

IN SSHFP

2 1 868361A51EC60607BFD964D0F8F3E4EE5E803FC6

webstatic.cacert.org.

IN SSHFP

2 2 A173BB85EC19F63ECB273BCA130EF63501FE1B89FD55B62997195E6816CAB547

webstatic.cacert.org.

IN SSHFP

3 1 7FC847CEC20B9D65296D4A0EDAFBA22A14EE9DC4

webstatic.cacert.org.

IN SSHFP

3 2 68879264E0ED5D0914797BF2292436FB32CCA24683DCF5D927A53589C1BFB6D7

webstatic.intra.cacert.org.

IN A

172.16.2.116

See also

See Wiki SystemAdministration/Procedures/DNSChanges

Operating System

  • Debian GNU/Linux 10.4

Services

Listening services

Port

Service

Origin

Purpose

22/tcp

ssh

ANY

admin console access

25/tcp

smtp

local

mail delivery to local MTA

80/tcp

http

ANY

application

5665/tcp

icinga2

monitor

remote monitoring service

Running services

Service

Usage

Start mechanism

Apache httpd

Webserver for static content

systemd unit apache2.service

cron

job scheduler

systemd unit cron.service

dbus-daemon

System message bus daemon

systemd unit dbus.service

Exim

SMTP server for local mail submission

systemd unit exim4.service

icinga2

Icinga2 monitoring agent

systemd unit icinga2.service

openssh server

ssh daemon for remote administration

systemd unit ssh.service

Puppet agent

configuration management agent

systemd unit puppet.service

rsyslog

syslog daemon

systemd unit rsyslog.service

Connected Systems

  • Jenkins for publishing code documentation to codedocs.cacert.org and infrastructure documentation to infradocs.cacert.org

  • Monitor

  • Web as reverse proxy for hostnames funding.cacert.org and infradocs.cacert.org

  • Email as reverse proxy for the hostname community.cacert.org

Outbound network connections

Security

SSH host keys

Algorithm

Fingerprints

RSA

SHA256:MrsQxc9IUy0HcGbgEiMAWN3zzOcxxWHyKOMQ63pUbj8, MD5:da:e7:16:f9:98:b0:77:4f:38:a6:49:35:a5:5a:2a:c2

DSA

SHA256:oXO7hewZ9j7LJzvKEw72NQH+G4n9VbYplxleaBbKtUc, MD5:12:a5:87:27:6b:2f:e3:cd:d6:e5:fb:f2:43:2f:7c:be

ECDSA

SHA256:aIeSZODtXQkUeXvyKSQ2+zLMokaD3PXZJ6U1icG/ttc, MD5:5e:94:ad:e8:84:3b:e2:b0:0b:7f:44:ec:a9:99:95:b2

ED25519

SHA256:NC34l1qSufrBdjxjJk75oOnmhrQW1VkLILsOhJle77A, MD5:da:58:d0:89:23:6f:ca:f7:b2:5f:a3:51:2f:6b:95:0d

See also

SSH host key list

Dedicated user roles

Role

Purpose

jenkins-infradocs

Used by Jenkins to upload documentation to /var/www/codedocs.cacert.org/html/ and /var/www/infradocs.cacert.org/html/

Todo

manage jenkins-infradocs user via Puppet

Non-distribution packages and modifications

The Puppet agent package and a few dependencies are installed from the official Puppet APT repository because the versions in Debian are too old to use modern Puppet features.

Risk assessments on critical packages

Apache httpd is configured with a minimum of enabled modules to allow serving static content and nothing else to reduce potential security risks.

Access to the jenkins-infradocs user is gated by a defined ssh key.

The system uses third party packages with a good security track record and regular updates. The attack surface is small due to the tightly restricted access to the system. The puppet agent is not exposed for access from outside the system.

Critical Configuration items

The system configuration is managed via Puppet profiles. There should be no configuration items outside of the CAcert Git repository cacert-puppet.

Keys and X.509 certificates

The host does not provide own TLS services and therefore has no certificates.

Apache httpd configuration

Apache configuration is managed via the Puppet profile profiles::static_websites.

Debian repository configuration

The Debian repository is managed via the Puppet profile profiles::debarchive. Packages that are uploaded to /srv/upload/incoming are automatically processed by inoticoming and reprepro. Only packages signed by a known PGP key (managed via Puppet) are accepted and provided at https://webstatic.infra.cacert.org/.

The repository signing key is stored in /srv/debarchive/.gnupg/private-keys-v1.d/223894064EE26851A245DE9208C5C0ABF772F7A7.key.

Tasks

Changes

Planned

System Future

  • No plans