List outgoing NTP as connectivity requirement & add troubleshooting entry

netsec-ethz / scion-tutorials

Website providing step-by-step instructions on participating in the SCIONLab network.

https://docs.scionlab.org

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Closed cmeury closed 4 years ago

cmeury commented 4 years ago

Missing NTP outgoing rule was likely an oversight.
Adding a short blurb about time drift as a potential cause for connectivity issues.

This change is