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Improve use of squid proxy docs #386

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Improve use of squid proxy docs #386

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adding information from issue
Feb 20, 2025
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typo fix
Feb 20, 2025
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19 changes: 19 additions & 0 deletions docs/getting_access/native_installation.md
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Expand Up @@ -74,6 +74,25 @@ The good news is that all of this only requires a handful commands :astonished:
sudo bash -c "echo 'CVMFS_CACHE_BASE=<some other directory for the cache>' >> /etc/cvmfs/default.local"
```

!!! Warning
When using the default setting `CVMFS_CLIENT_PROFILE="single"`, `CVMFS_HTTP_PROXY` is set to `auto;DIRECT`. Ìn case you have setup with a private Stratum 1 with no proxy, this can lead to unintended requests to Web Proxy Auto Discovery (WPAD) infrastructure before falling back to direct connections. Removing the `auto` ensures direct connections without unnecessary WPAD requests.
```bash
sudo bash -c "echo 'CVMFS_HTTP_PROXY=direct' >> /etc/cvmfs/default.local"
```

Additionally, if you have a local proxy configured with:

```bash
CVMFS_HTTP_PROXY=<local-proxy>;DIRECT
```

and the local proxy becomes unavailable, the client will not directly contact the Stratum 1. Instead, it will failover to CERN/FNAL fallback proxies as its set in CernVM-FS's general configuration:

```bash
CVMFS_FALLBACK_PROXY="http://cvmfsbproxy.cern.ch:3126;http://cvmfsbproxy.fnal.gov:3126 # Taken from /cvmfs/cvmfs- config.cern.ch/etc/cvmfs/common.conf
```
Be aware that in such cases, the `DIRECT` directive is silently ignored.

## Installation for larger systems (e.g. clusters)

When using CernVM-FS on a larger number of local clients, e.g. on a HPC cluster or set of workstations,
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