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title: Communication modes
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- https://raw.githubusercontent.com/automotive-grade-linux/docs-sources/master/docs/security-blueprint/part-2/2-Communication-modes.md
---
-<!-- WARNING: This file is generated by fetch_docs.js using /home/boron/Documents/AGL/docs-webtemplate/site/_data/tocs/architecture/master/security_blueprint-security-blueprint-book.yml -->
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# Communication modes
## Disable USB, Serial and DOCSIS Support
## Disable all unused Network Interfaces
-Only used network interfaces should be enabled.
-Where possible, services should also be limited to those necessary.
+Only used network interfaces should be enabled. Where possible, services should
+also be limited to those necessary.
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In U-Boot following flash memory commands shall be disabled:
-**NAND**: Support for nand flash access available through `do_nand` has to be disabled.
+**NAND**: Support for nand flash access available through `do_nand` has to be
+disabled.
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