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Update system-requirements.md

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paigehargrave 2019-02-15 06:36:08 -05:00 committed by GitHub
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@ -84,6 +84,14 @@ host types:
| managers | TCP 12386 | Internal | Port for the authentication worker |
| managers | TCP 12388 | Internal | Internal Port for the Kubernetes API Server |
## Avoid firewall conflicts
For SUSE Linux Enterprise Server 12 SP2 (SLES12), the `FW_LO_NOTRACK` flag is turned on by default in the openSUSE firewall. This speeds up packet processing on the loopback interface, and breaks certain firewall setups that need to redirect outgoing packets via custom rules on the local machine.
To turn off the FW_LO_NOTRACK option, edit the `/etc/sysconfig/SuSEfirewall2` file and set `FW_LO_NOTRACK="no"`. Save the file and restart the firewall or reboot.
For For SUSE Linux Enterprise Server 12 SP3, the default value for `FW_LO_NOTRACK` was changed to `no`.
## Enable ESP traffic
For overlay networks with encryption to work, you need to ensure that