Update ports used by dcos-net

[deric]

Description

https://jira.mesosphere.com/browse/DCOS_OSS-3751

Urgency

• [x] Medium

Requirements

• Test all commands and procedures.
• Build content locally and test for formatting/links.
• Add redirects to dcos-website/redirect-files.
• Change all affected versions (e.g. 1.7, 1.8, 1.9, and 1.10).
• See the contribution guidelines.

[mesosphere-ci]

Can one of the admins verify this patch?