🔀 Changing Default Ports in the Cosmos Ecosystem

Cosmos-based blockchains use Tendermint, which relies on specific network ports. If you run multiple nodes on the same server, you must change their default ports.

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Default Ports Used by Tendermint

Component	Default Port
P2P	26656
RPC	26657
ABCI	26658
PProf	6060
Prometheus	26660
gRPC	9090
gRPC-Web	9091
REST API	1317

⚠️ Running multiple nodes on one server is not recommended — proceed at your own risk.

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Configuration Files

$HOME/.your_node/config/config.toml
$HOME/.your_node/config/app.toml
$HOME/.your_node/config/client.toml

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Change Ports Automatically Using sed

config.toml

# Node 2
sed -i.bak -e "s%127.0.0.1:26658%127.0.0.1:36658%; s%127.0.0.1:26657%127.0.0.1:36657%; s%0.0.0.0:26656%0.0.0.0:36656%; s%6060%6061%; s%26660%36660%" $HOME/.your_node/config/config.toml

# Node 3
sed -i.bak -e "s%127.0.0.1:26658%127.0.0.1:46658%; s%127.0.0.1:26657%127.0.0.1:46657%; s%0.0.0.0:26656%0.0.0.0:46656%; s%6060%6062%; s%26660%46660%" $HOME/.your_node/config/config.toml

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app.toml

# Node 2
sed -i.bak -e "s%0.0.0.0:9090%0.0.0.0:9190%; s%0.0.0.0:9091%0.0.0.0:9191%; s%0.0.0.0:1317%0.0.0.0:1327%" $HOME/.your_node/config/app.toml

# Node 3
sed -i.bak -e "s%0.0.0.0:9090%0.0.0.0:9290%; s%0.0.0.0:9091%0.0.0.0:9291%; s%0.0.0.0:1317%0.0.0.0:1337%" $HOME/.your_node/config/app.toml

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client.toml

# Node 2
sed -i.bak -e "s%localhost:26657%localhost:36657%" $HOME/.your_node/config/client.toml

# Node 3
sed -i.bak -e "s%localhost:26657%localhost:46657%" $HOME/.your_node/config/client.toml

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external_address

# Node 2
sed -i.bak -e "s/^external_address *=.*/external_address = \"$external_address:36656\"/" $HOME/.your_node/config/config.toml

# Node 3
sed -i.bak -e "s/^external_address *=.*/external_address = \"$external_address:46656\"/" $HOME/.your_node/config/config.toml

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Restart the Node After Changes

systemctl restart yournoded && journalctl -u yournoded -f -o cat

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✅ Tip: Always back up configuration files before editing. .bak copies are automatically created by sed.