# How to prevent devices from announcing themselves to stdiscosrv with random ports in addition to port 22000, while nat and lan discovery are already disabled?

**URL:** https://forum.syncthing.net/t/how-to-prevent-devices-from-announcing-themselves-to-stdiscosrv-with-random-ports-in-addition-to-port-22000-while-nat-and-lan-discovery-are-already-disabled/22814
**Category:** Support
**Created:** [September 18, 2024, 11:11am UTC](https://forum.syncthing.net/t/how-to-prevent-devices-from-announcing-themselves-to-stdiscosrv-with-random-ports-in-addition-to-port-22000-while-nat-and-lan-discovery-are-already-disabled/22814 "2024-09-18T11:11:20Z")
**Posts on this page:** 1
**Showing post:** 5

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### Author: ![firesnake](https://forum.syncthing.net/letter_avatar_proxy/v4/letter/f/dbc845/32.png) [@firesnake](https://forum.syncthing.net/u/firesnake)
#### Post date: [September 18, 2024, 1:11pm UTC](https://forum.syncthing.net/t/how-to-prevent-devices-from-announcing-themselves-to-stdiscosrv-with-random-ports-in-addition-to-port-22000-while-nat-and-lan-discovery-are-already-disabled/22814/5 "2024-09-18T13:11:59Z")

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no, they’re linux. one some older fedora 22, one an oracle linux 7. see more details and logs on these threads

> [@Cannot get QUIC working at all](https://forum.syncthing.net/t/cannot-get-quic-working-at-all/22782/8):
>
> wait. I just re-tested using netcat and I am not receiving everything that I paste on one end. I need to dig what’s happening down at ip/udp level. I was fooled initially by only typing a few characters, but pasted a copy paste from a random webpage and not all text went through!

> [@Problem with Private Relay Server (persists)](https://forum.syncthing.net/t/problem-with-private-relay-server-persists/22781/3):
>
> Did you try running with -debug to see what it says? I can’t see anything hardcoded in the relay. Syncthing itself also has timeouts, as well as the kernel/os.

> [@Installation on hundreds of devices](https://forum.syncthing.net/t/installation-on-hundreds-of-devices/22717/3):
>
> forgot to mention that the files content will never modify, so rsync advantage of only differing blocks will not apply here. every now and then, a whole new file get introduced in the folder and older ones deleted.

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