Re: Android client SYN packets dropped

[Sad Clouds <cryintothebluesky%gmail.com@localhost>]

On Sun, 16 May 2021 09:23:42 +0300
Arto Huusko <armihu%gmail.com@localhost> wrote:

> Johnny Billquist kirjoitti 15.5.2021 klo 19.26:
> > On 2021-05-15 15:33, Arto Huusko wrote:
> 
> >> My Android 10 phone is unable to connect to any TCP services hosted
> >> on a NetBSD -current 9.99.73 server. Connections to the services
> >> from other devices on the same LAN work.
> 
> > Is your phone getting into the ARP cache? If not, then the packets
> > would indeed be dropped like that.
> 
> Thank you! After some system update the phone had turned on randomized
> MAC address on the local wifi network.
> arp -a showed the arp entry in incomplete state.
> Switching randomized MAC off fixed the problem.
> 
> Arto

Not sure why this would be a problem. If the device is using a new
randomized MAC address, then it should be added to the ARP cache with a
new IP address, as if a new device joined the network.