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network/litep2p: Switch to system DNS resolver #9321

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Merged
dmitry-markin merged 2 commits into from
Jul 25, 2025
Merged

network/litep2p: Switch to system DNS resolver #9321

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network/litep2p: Switch to system DNS resolver
dmitry-markin Jul 24, 2025
1f0fd4a
Update from github-actions[bot] running command 'prdoc --audience nod…
github-actions[bot] Jul 24, 2025
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10 changes: 10 additions & 0 deletions prdoc/pr_9321.prdoc
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Original file line number Diff line number Diff line change
@@ -0,0 +1,10 @@
title: 'network/litep2p: Switch to system DNS resolver'
doc:
- audience: Node Dev
description: |-
Switch to system DNS resolver instead of 8.8.8.8 that litep2p uses by default. This enables full administrator control of what upstream DNS servers to use, including resolution of local names using custom DNS servers.

Fixes https://github.com/paritytech/polkadot-sdk/issues/9298.
crates:
- name: sc-network
bump: patch
3 changes: 3 additions & 0 deletions substrate/client/network/src/litep2p/mod.rs
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Expand Up @@ -517,6 +517,9 @@ impl<B: BlockT + 'static, H: ExHashT> NetworkBackend<B, H> for Litep2pNetworkBac
Some(crate::MAX_CONNECTIONS_ESTABLISHED_INCOMING as usize),
))
.with_keep_alive_timeout(network_config.idle_connection_timeout)
// Use system DNS resolver to enable intranet domain resolution and administrator
// control over DNS lookup.
.with_system_resolver()
.with_executor(executor);

if let Some(config) = maybe_mdns_config {
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