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---
title: Dom0
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visible: true
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---
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[toc]
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## Firewall
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The firewall configuration can be changed with an already included package.
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Call the TUI version with `system-config-firewall-tui`
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The only open port will be 22/tcp for SSH Access
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## SSH Access
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Disable password authentication. See [ssh ](/remote/ssh )
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## Local ISO Storage
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Using ISO Storage on "/" or subdirectories on the same partition is not really viable, as only 18GiB are assigned to this mountpoint by default.
Instead use the local EXT mapper device. This is mounted under `/run/sr-mount/(id)`
Create a new "ISO" directory.
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If you want to still use an easier to remember path, create a symbolic link. For example `ln -s /run/sr-mount/69d19d8e-f0dd-92d8-41bc-3d974b20f4f8/ISO/ /root/ISO` . You'll be able to use the path `/root/ISO` in the webinterface as local ISO storage.
