NTP Packet blocked... nftables [solved] (programming.dev)

submitted 1 day ago* (last edited 1 day ago) by Corsair@programming.dev to c/linux@lemmy.ml

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Hi,

I want to use openntpd to sync my clock

I'm using

ntpd -ds

I see in my firewall that the dns resolution is working, and I get a server IP from the pool 👍

but anyhow I get

ntp engine ready no reply received in time, skipping initial time setting
no reply from x.x.x.x received in time, next query 300s

Weird my nftable config file should allow it:

# extract
chain OUT {
type filter hook output priority 0; policy drop;
udp dport 123 accept
}

chain IN {
type filter hook input priority 0; policy drop;
ct state established, related accept
}

Any ideas, or which lemmy community to cross-post ?

Thanks.

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[-] Corsair@programming.dev 1 points 1 day ago

Thanks @InnerScientist@lemmy.world & @ark3@lemmy.dbzer0.com

Actually I don't think it's the firewall, because all the other programs, protocol are working fine. I've tried with chrony too but I get

No suitable source for synchronisation

May be because the client is a VM ?

[-] InnerScientist@lemmy.world 1 points 1 day ago

because all the other programs, protocol are working fine.

With the shown firewall configuration nothing but NTP should work? You're dropping outgoing packets by default.

this post was submitted on 22 Mar 2026

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