Yesterday I installed a HP Procurve 1810 as main switch at home. There is a feature on more recent HP Procurve models (18xx series) and it’s called “Auto DoS”. I didn’t see no harm in enabling it, after configuring all the basics I tested the whole setup.
After I enabled “Auto DoS” on the switch, it turns out that it blocks NFS traffic. After disabling this option everything was working again.
You can find it in the section “Security” and then “Advanced security”.
If you enable the Auto DoS feature, traffic is blocked based on one of these conditions:
- the source port (TCP / UDP) is identical to the destination port (NTP, SYSLOG, etc)
- the source port (TCP / UDP) is ‘privileged’ thus in the range of 1 -1023.