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Update Chrony configurations

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Tommy 2023-08-08 21:08:20 -07:00 committed by GitHub
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7
content/posts/linux/Desktop Linux Hardening.md
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@ -388,6 +388,13 @@ If decide on using NTS with chronyd, consider using multiple, independent time p
GrapheneOS uses a [quite nice chrony configuration](https://github.com/GrapheneOS/infrastructure/blob/main/chrony.conf) for their infrastructure. I recommend that you replicate their `chrony.conf` on your system. GrapheneOS uses a [quite nice chrony configuration](https://github.com/GrapheneOS/infrastructure/blob/main/chrony.conf) for their infrastructure. I recommend that you replicate their `chrony.conf` on your system.
You should also enable the secommp filter for chronyd in `/etc/sysconfig/chronyd`:
```
# Command-line options for chronyd
OPTIONS="-F 1"
```
![Verifying NTS configuration](/images/nts.png) ![Verifying NTS configuration](/images/nts.png)
### Pluggable Authentication Modules (PAM) ### Pluggable Authentication Modules (PAM)

12
content/posts/macos/Secure Time Synchronization on macOS.md
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@ -103,6 +103,9 @@ server ptbtime1.ptb.de iburst nts
minsources 2 minsources 2
authselectmode require authselectmode require
# EF
dscp 46
driftfile /var/lib/chrony/drift driftfile /var/lib/chrony/drift
ntsdumpdir /var/lib/chrony ntsdumpdir /var/lib/chrony
@ -117,7 +120,14 @@ cmdport 0
allow 10.0.2.2/32 allow 10.0.2.2/32
``` ```
If you are confused about what this configuration is doing, here are some quick explanations: Optionally, you can enable the secommp filter for chronyd in `/etc/sysconfig/chronyd`:
```
# Command-line options for chronyd
OPTIONS="-F 1"
```
If you are confused about what these configurations are doing, here are some quick explanations:
* We get our time from 4 different sources: * We get our time from 4 different sources: