These services don't create files on disk, let alone on a network
filesystem, so they don't really need a fixed uid. And this also gets
rid of a warning coming from <= 14.12 systems.
This updates rdnssd to the following:
* Using the systemd interfaces directly
* Using the rdnssd user instead of the root user
* Integrating with resolvconf instead of writing directly to /etc/resolv.conf
This patch resolves all uid/gid conflicts except for nobody/nogroup (seems
to make sense that these are the same).
All conflicts where determined mechanically, but resolutions were manual.
This patch also marks uids/gids with no corresponding group/user as "unused"
(aka. reserved).
Briefly,
- tss group conflicts with dhcpcd
The tss group id conflicts with dhcpcd: assign
a new number and add a corresponding tss user.
- elasticsearch uid conflicts with haproxy gid
- resolve firebird/munin conflict
- fix fourstorehttp{,d} typo
- fix ghostOne typo: the service module refers to gids.ghostone, so use that
in ids
- memcached uid conflicts with users gid
- nagios uid conflicts with disks gid
- nscd uid conflicts with wheel gid
- ntp uid conflicts with tty gid
- resolve postfix/postdrop id uid
- redis uid conflicts with keys gid
- sshd uid conflicts with kmem gid
- tcryptd uid conflicts with openldap gid
- unifi uid conflicts with docker gid
- uptimed uid conflicts with utmp gid
- zope2 uid conflicts with connman gid
- tomcat uid/gid mismatch
I had to make several adjustments to make it work with nixos:
* Replace relative config file lookups with ENV variable.
* Modify gitlab-shell to not clear then environment when running
pre-receive.
* Modify gitlab-shell to write some environment variables into
the .authorized_keys file to make sure gitlab-shell reads the
correct config file.
* Log unicorn output to syslog.
I tried various ways of adding a syslog package but the bundler would
not pick them up. Please fix in a better way if possible.
* Gitlab-runner program wrapper.
This is useful to run e.g. backups etc. with the correct
environment set up.
This overhauls the Tor module in a few ways:
- Uses systemd service files, including hardening/config checks
- Removed old privoxy support; users should use the Tor Browser
instead.
- Remove 'fast' circuit/SOCKS port; most users don't care (and it adds
added complexity and confusion)
- Added support for bandwidth accounting
- Removed old relay listenAddress option; taken over by portSpec
- Formatting, description, code cleanups.
Signed-off-by: Austin Seipp <aseipp@pobox.com>
The dnscrypt-proxy service relays regular DNS queries to
a DNSCrypt enabled upstream resolver.
The traffic between the client and the upstream resolver is
encrypted and authenticated, which may mitigate the risk of
MITM attacks and third-party snooping (assuming a trustworthy
upstream).
Though dnscrypt-proxy can run as a standalone DNS client,
the recommended setup is to use it as a forwarder for a
caching DNS client.
To use dnscrypt-proxy as a forwarder for dnsmasq, do
```nix
{
# ...
networking.nameservers = [ "127.0.0.1" ];
networking.dhcpcd.extraConfig = "nohook resolv.conf";
services.dnscrypt-proxy.enable = true;
services.dnscrypt-proxy.localAddress = "127.0.0.1";
services.dnscrypt-proxy.port = 40;
services.dnsmasq.enable = true;
services.dnsmasq.extraConfig = ''
no-resolv
server=127.0.0.1#40
listen-address=127.0.0.1
'';
# ...
}
```
It's not that difficult to define shares using standard samba config
file syntax, so why do we need the semi-configurable .defaultShare
option?
Also:
* It uses /home/smbd and I think /home should be reserved
for real human users.
* If enabled, it breaks the assumption that .extraConfig continues in
the [global] section.
Without .defaultShare there is no need for the "smbguest" user and group
either, mark them as unused.
* The module now has systemd config
* Add resolveLocalQueries option which sets up it as a dns server for
local host (including reasonable setup of resolvconf)
* Add "dnsmasq" user for running daemon
* Enabled dbus and dnssec support for the package
Conflicts:
nixos/modules/misc/ids.nix
Additionally, remove the automatic initialization of the ipv6 forwarding
sysctl as this should be handled by the end user. This really should not
be an issue as most people running radvd are likely forwarding ipv6
packets.
This version of module has disabled socketActivation, because until
nixos upgrade systemd to at least 214, systemd does not support
SocketGroup. So socket is created with "root" group when
socketActivation enabled. Should be fixed as soon as systemd upgraded.
Includes changes from #3015 and supersedes #3028
This overhauls the Datadog module a bit to be much more useful. In
particular, it adds support for nginx and postgresql monitoring
integrations to dd-agent. These have to exist in separate files under
/etc/dd-agent, so the module just exposes then as separate options. In
the future, more integrations could be added this way.
In the process of doing this, I also had to rename the dd-agent user to
datadog. Note the UIDs did not change, so this is strictly backwards
compatible. The reason for this is to make it easier to create a
'datadog' postgres user with access to pg_stats, as 'dd-agent' typically
isn't a valid username. This allows the out of the box configurations to
be used.
Signed-off-by: Austin Seipp <aseipp@pobox.com>
The style for IDs dictates that groups/users should have the same ID -
so if a user doesn't have a group or vice versa, then we should skip
that ID.
In this case, we had already assigned grsecurity GID 121, but I
accidentally also assigned Hydra UID 121. Instead, let's assign Hydra
UID 122. And also assign a GID (122) as well.
Luckily nobody was depending on this yet (except me).
Signed-off-by: Austin Seipp <aseipp@pobox.com>
This module implements a significant refactoring in grsecurity
configuration for NixOS, making it far more usable by default and much
easier to configure.
- New security.grsecurity NixOS attributes.
- All grsec kernels supported
- Allows default 'auto' grsec configuration, or custom config
- Supports custom kernel options through kernelExtraConfig
- Defaults to high-security - user must choose kernel, server/desktop
mode, and any virtualisation software. That's all.
- kptr_restrict is fixed under grsecurity (it's unwriteable)
- grsecurity patch creation is now significantly abstracted
- only need revision, version, and SHA1
- kernel version requirements are asserted for sanity
- built kernels can have the uname specify the exact grsec version
for development or bug reports. Off by default (requires
`security.grsecurity.config.verboseVersion = true;`)
- grsecurity sysctl support
- By default, disabled.
- For people who enable it, NixOS deploys a 'grsec-lock' systemd
service which runs at startup. You are expected to configure sysctl
through NixOS like you regularly would, which will occur before the
service is started. As a result, changing sysctl settings requires
a reboot.
- New default group: 'grsecurity'
- Root is a member by default
- GRKERNSEC_PROC_GID is implicitly set to the 'grsecurity' GID,
making it possible to easily add users to this group for /proc
access
- AppArmor is now automatically enabled where it wasn't before, despite
implying features.apparmor = true
The most trivial example of enabling grsecurity in your kernel is by
specifying:
security.grsecurity.enable = true;
security.grsecurity.testing = true; # testing 3.13 kernel
security.grsecurity.config.system = "desktop"; # or "server"
This specifies absolutely no virtualisation support. In general, you
probably at least want KVM host support, which is a little more work.
So:
security.grsecurity.enable = true;
security.grsecurity.stable = true; # enable stable 3.2 kernel
security.grsecurity.config = {
system = "server";
priority = "security";
virtualisationConfig = "host";
virtualisationSoftware = "kvm";
hardwareVirtualisation = true;
}
This module has primarily been tested on Hetzner EX40 & VQ7 servers
using NixOps.
Signed-off-by: Austin Seipp <aseipp@pobox.com>
