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Issue 14 - run nsncd as nsncd user #129

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Issue 14 - run nsncd as nsncd user #129

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eadb46c
Merge pull request #123 from morisja/issue-122
leifwalsh Oct 3, 2024
584a49e
nsncd.service: run as non-root
flokli Apr 23, 2024
55734e0
Ensure nsncd user exists and update unit file accordingly
morisja Oct 6, 2024
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4 changes: 4 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,10 @@ and mailing lists.
Just run the `nsncd` binary and it will listen at `/var/run/nscd/socket`.
There's a simple `systemd` unit file, too.

It will run `nsncd` as the `nscd` user and group, and apply some sandboxing.
It also relies on the systemd `RuntimeDirectory=` functionality to create the
directory at `/var/run/nscd` with appropriate permissions.

If you're on a Debian-based system, you can use the provided Debian package to
install `nsncd` to run under `systemd`. See `debian/README.source` for how to
build it - we use a few Rust crates that aren't packaged for stable Debian
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11 changes: 11 additions & 0 deletions debian/postinst
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@@ -0,0 +1,11 @@
#!/bin/sh -e
#DEBHELPER#

if ! getent group nsncd >/dev/null 2>&1; then
addgroup --system --quiet nsncd
fi
if ! getent passwd nsncd >/dev/null 2>&1; then
adduser --system --quiet --ingroup nsncd \
--no-create-home --home /nonexistent \
nsncd
fi
10 changes: 10 additions & 0 deletions nsncd.service
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Expand Up @@ -17,6 +17,16 @@ Description=name-service non-caching daemon

[Service]
ExecStart=/usr/lib/nsncd
User=nsncd
Group=nsnccd
RemoveIPC=true
PrivateTmp=true
NoNewPrivileges=true
RestrictSUIDSGID=true
ProtectSystem=strict
ProtectHome=read-only
Restart=always
RuntimeDirectory=nscd
Restart=always
Type=notify

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