Secret Network
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  • 👋INTRODUCTION
    • Secret Network Introduction
    • Secret Network Techstack
      • Private transactions - A quick summary
      • Blockchain Technology
        • Cosmos Basics
        • Tendermint
        • Cosmos SDK
        • IBC
        • CosmWasm
      • Privacy Technology
        • Encryption - Key Management
          • Overview
          • Key Derivation & Encryption Techniques
          • The Initialization Of Secret Network
          • Full Node Boostrap
          • Contract State Encryption
          • Transaction Encryption
          • Consensus seed rotation
        • Trusted Execution Environments  (TEE) —  Intel SGX
          • How Secret Network Uses SGX
          • SGX-SPS Security & Reliabillity
          • Remote Attestation
          • Trusted & Untrusted Core
          • Sealing
        • Private smart contracts - overview
  • 💻Development
    • 🏠Getting Started
      • Setting Up Your Environment
        • Cargo.toml Best Practices (Crates vs Dependencies)
      • Compile and Deploy
      • Running the Application
      • Compile and Deploy on Secret testnet (best for Javascript devs)
      • Fullstack dApp Integration
    • 🤓Secret Contracts
      • Secret Contracts & CosmWasm
        • Framework overview
        • Secret Contract Components
          • Instantiation Message
          • Execution Message
          • Query Message
          • Deps/DepsMut
          • Storage
            • Prefixed Storage
            • Singleton
            • Keymap
            • Append Store
            • Best practices
        • CosmWasm vs Secret CosmWasm
      • Secret Tokens (SNIP-20)
      • Contract - module call
      • Secret contract - Design Space/Features
        • Secret Contracts introduction
        • Gas/Fee usage
        • TPS and scalability
        • Privacy Essentials
        • Access Control
          • Viewing Keys
          • Permits
        • Trusted and untrusted data
        • Secret-VRF - on-chain Randomness
        • Privacy design
          • Mitigate privacy risks - full guide
          • Gas Evaporation & Tracking
        • Confidential Computing Layer
        • Fiat/Crypto Onboarding
        • Account abstraction
        • Fee abstraction
        • Wallet support
        • Bridge (messaging/tokens)
        • IBC (Hooks, PFM, Wasm)
        • Price Oracles
        • Auto Restaking
      • Permissioned Viewing
        • Viewing Keys
        • Permits
      • Cross Contract Communication
      • Submessages
        • get_contract_code_hash
      • Randomness API - Secret VRF
        • Native On-chain randomness
        • Randomness over IBC
      • Execution Finalization
      • Factory Contracts
      • Contract Migration
        • Manual - < v1.11
        • Native - from v1.11
      • Cross-deploy Vanilla CW and Secret Contracts
      • Testing Secret Contracts
        • Unit Tests
        • Continuous Integration
        • Datatype Handling - Uint, floats etc.
    • 👀Secret Contract - Reference, Guides, Examples
      • Starter guide - Millionaire's Problem
      • Reference Contracts
      • Open source dApps
      • Tools & Libraries
        • Network interaction SDKs
          • Secret.js (JavaScript)
          • SecretPy (Python)
          • SecretK (Kotlin)
          • Secret.NET
            • Snippets
              • Deploying a Contract
              • Send Native Coin
              • Query a Contract
              • Create a new Wallet
              • Permits
              • SNIP20
              • SNIP721
          • Shade.Js
        • LocalSecret - Devnet docker
        • Smart contract - Tools/Utils
          • Secret Toolkit
          • CW-Plus
          • Fadroma - SC framework
          • Hidden Gems
          • Other
            • Secret IDE
            • Polar
    • 🖼️Frontend Development
      • Getting Started with SecretJS
        • Usage Examples
          • Sending Queries
          • Sending Messages
          • Contract Migration
          • Wallet Integrations
          • Query Permits
          • SNIP20 (SCRT Tokens)
          • SNIP721 (Secret NFTs)
      • Feegrant
        • Understanding Feegrant allowances
        • Grant allowances
        • Using grant allowances to execute transactions
        • Using the Fee Grant Faucet
    • 📬Deployment Addresses/ API Endpoints
      • Secret (SNIP 20) token contracts list
        • SNIP Asset naming guidelines
      • Connecting to the Network
        • API Endpoints Mainnet (Secret-4)
        • API Endpoints Testnet (Pulsar-3)
        • Usage examples
        • Comparison of endpoint types
      • Create your own SNIP-25 IBC Token
  • Secret AI
    • 🤝Introduction
    • 🏗️Architecture
    • 👩‍💻Secret AI SDK
      • Setting Up Your Environment
      • Running the Application
    • 🪙Economics
    • Smart Contract Reference
      • SubscriptionManager
      • WorkerManager
      • RewardsManager
  • 🔓Confidential Computing Layer
    • 🧑‍🚀IBC Developer Toolkit
      • Basics
        • Overview
        • Cross-chain Messaging with IBC Hooks
          • Functions, Methods, and Data Structures
          • Typescript SDK
          • IBC-Hooks
        • IBC Relaying with Go Relayer
      • Usecases
        • Storing Encrypted Data on Secret Network
          • Key-Value store Developer Tutorial
        • Secret VRF for IBC with IBC-Hooks
        • Confidential Voting
        • Sealed Bid Auctions
      • Supported Networks
        • Mainnet
        • Testnet
    • 🤝Ethereum (EVM) Developer Toolkit
      • Basics
        • Overview
        • Connecting Metamask to Secret Network
        • SecretPath + Reown integration
        • Cross-chain Messaging
          • SecretPath
            • Architecture Overview
            • Detailed Architecture
            • SecretPath Developer Tutorials
            • Public EVM Gateway Architecture
            • How to deploy SecretPath on your chain
          • Axelar GMP
            • Architecture Overview
            • Axelar GMP Developer Tutorial
      • Usecases
        • Storing Encrypted Data on Secret Network
          • Key-Value store Developer Tutorial
        • Sealed Bid Auction
          • Sealed Bid Auction Developer Tutorial
        • Confidential Voting
          • Confidential Voting Developer Tutorial with SecretPath
        • VRF
          • Implementing VRF into any EVM Contract
          • VRF Developer Tutorial
          • Performance figures of SecretVRF vs competitors
          • Using encrypted payloads for VRF
          • Converting from Chainlink VRF to Secret VRF in four steps
        • Confidential Document Sharing
        • Tokens
          • From EVM to Secret
      • Supported Networks
        • EVM
          • EVM Mainnet
          • EVM Testnet
          • Gateway Contract ABI
        • Secret Gateway
          • SecretPath mainnet (secret-4) contracts
          • SecretPath testnet (pulsar-3) contracts
    • 🙌Solana Developer Toolkit
      • Usecases
        • Storing Encrypted Data on Secret Network
          • Key-value Store Developer Tutorial
        • VRF
          • VRF Developer Tutorial
      • Program IDs
        • Solana Mainnet & Testnet
        • Gateway Contract IDL
  • 🤫Overview, Ecosystem and Technology
    • 🚀Secret Network Overview
      • The SCRT coin
      • Private Tokens
      • Use Cases
        • Decentralized Finance (DeFi)
        • Art And Digital Media
        • Gaming
        • Data Privacy
        • Payments And Transactions
        • Communication
      • The technology
      • History
      • Roadmap (Core development)
        • Secret 2.0
      • Where To Buy SCRT?
      • Using the Testnet
    • 🐸Ecosystem Overview
      • Wallets
      • Applications
      • Explorers & tools
      • Funding
        • SCRT Labs Grants
        • Dilutive funding/VC raise
        • Community Pool
        • Developer bounties
          • SCRT Labs bounties [on-hold]
          • CCBL [on-hold]
          • CCR [On-hold]
        • Application specific
          • Shade Grants
      • Contributors & Entities
        • Validators
        • SCRT Labs
        • Secret Foundation
        • Secret Committees
          • Support
          • Governance
      • Secret Network Dictionary
  • 🔧Infrastructure
    • 🔓Use SecretCLI
      • Secretcli vs. Secretd
      • Install
      • Configuration
      • Address Types
      • Key Types
      • Generating Keys
      • Viewing Keys
      • Query Transactions
      • Send Tokens
      • Multisig Keys
      • Multisig Transactions
      • Transaction Broadcasting
      • Fees & Gas
      • Fee Distribution
      • Secret Contracts
      • Slashing
      • Minting
      • Delegating
      • Restake
      • Nodes
      • Governance
        • Creating Governance Proposals
        • Query Proposals
        • Deposits
        • Voting
    • 🔐Use Ledger hardware wallet
      • 🔐Ledger with SecretCLI
    • 🖥️Running a node/validator
      • Setting up a node/validator
        • Hardware setup
          • Hardware Compliance
          • VPS/Bare-Metal Compliance
            • Leaseweb Setup
            • PhoenixNAP Setup
            • Psychz Setup
            • nForce Setup
            • Vultr Setup
            • OVHCloud Setup
            • Microsoft Azure Setup
          • Patching your Node
          • Enclave verification
          • Registration troubleshooting
        • Testnet Setup
          • Install SGX
          • Install secretd
          • Setup Full Node
          • Testnet State Sync
          • Becoming a Testnet Validator
          • Installing CLI & Creating A New Address
        • Mainnet Setup
          • Install SGX
          • Install secretd
          • Setup Full Node
          • Quicksync / Snapshot
          • Statesync
          • Becoming A Validator
          • Installing CLI & Creating A New Address
      • Maintaining a node/validator
        • Slashing information
        • Migrating a Validator
        • Troubleshooting
        • Validator Backup
        • Server security
          • SSH authentication
          • Server configuration
          • Uncomplicated-Firewall (UFW)
          • Local CLI
        • Node Monitoring
          • Prometheus
            • Environment Preperation
            • Install Node Exporter
            • Install Prometheus
            • Configuring Prometheus
          • Grafana
            • Install Grafana
            • Grafana Dashboard
            • Next Steps
          • Docker
            • Install Docker
            • Configuration
            • Start Containers
            • Grafana Dashboard
            • Application Ports
            • Stop Containers
          • Goaccess
            • Install Goaccess
            • Setup Goaccess
        • Helpful commands
          • Query Validators
          • Bond Tokens
          • Withdraw Rewards
          • Query Delegations
          • Unbond Tokens
          • Query Unbonding-Delegations
          • Redelegate Tokens
          • Query Redelegations
          • Query Parameters
          • Query Pool
          • Query Delegations To Validator
      • API Noderunning
        • Running Multiple Nodes on the Same Server
        • Node Loadbalancing using Nginx
          • Setup Nginx
          • Example Nginx config
        • Using Auto heal to improve cluster uptime for Nginx
      • Sentry and Archive nodes
        • Mantlemint
        • Sentry Nodes
        • Archive Nodes
    • ⛓️IBC Relayers
      • Hermes
      • RLY
      • IBC channel database
    • 🆙Upgrade Instructions
      • v1.13
      • v1.12
      • v1.11
      • v1.10
      • v1.9
      • v1.8
      • v1.7
      • Shockwave Omega v1.6
      • v1.5
      • Shockwave Delta v1.4
      • Shockwave Delta v1.4 (Testnet)
      • Shockwave Alpha v1.3
      • Cosmovisor
      • Vulcan Network Upgrade (OLD)
    • ☠️Postmortems
      • SNIP-20 leaks
      • xApic
      • Secpk-Verifications Bloat
      • Earn Contract Exploit
      • Testnet Halt 95
    • ✍️Contribute to the documentation
      • Report Bugs
      • Suggest Enhancements
      • First Contribution Guide
      • Pull Request Templates
        • Update Documentation
        • Bug Fix
        • Improve Performance
        • Change Functionality
      • Style Guide
    • 🌊Versioning & Changelog
      • Secret Network v1.13
      • Secret Network v1.12
      • Secret Network v1.11
      • Secret Network v1.10
      • Secret network v1.9
      • Secret Network v1.7/1.8
      • Secret Network v1.6
      • Secret Network v1.5
      • Secret Network v1.4 (CosmWasm 1.0)
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  • Setup Basic Firewall With UFW
  • Setup
  • Set Outgoing Connections
  • Set Incoming Connections
  • Set And Limit SSH Connections
  • Set Accessible Ports
  • Enable UFW Firewall

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  1. Infrastructure
  2. Running a node/validator
  3. Maintaining a node/validator
  4. Server security

Uncomplicated-Firewall (UFW)

PreviousServer configurationNextLocal CLI

Last updated 1 year ago

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Setup Basic Firewall With UFW

Uncomplicated Firewall (UFW) is a program for managing a netfilter firewall designed for easy use. It uses a command-line interface (CLI) with a small number of simple commands, and is configured with . UFW is available by default in all Ubuntu installations after 18.04 LTS, and features tools for intrusion prevention which we will cover in this guide.

Setup

Start by checking the status of UFW.

sudo ufw status

Then proceed to configure your firewall with the following options, preferably in this order.

The order is important because UFW executes the instructions given to it in the order they are given, so putting the most important and specific rules first is a good security practice. You can insert UFW rules at any position you want to by using the following syntax (do not execute the following command when setting up your node security):

ufw insert 1 <command ex. deny> from <ip> to any // example only

The example command above would be placed in the first position (instead of the last) of the UFW hierarchy and deny a specific IP address from accessing the server.

Set Outgoing Connections

This sets the default to allow outgoing connections unless specified they should not be allowed.

sudo ufw default allow outgoing

Set Incoming Connections

This sets the default to deny incoming connections unless specified they should be allowed.

sudo ufw default deny incoming

Set And Limit SSH Connections

This allows SSH connections by the firewall.

sudo ufw allow ssh/tcp

This limits SSH login attempts on the machine. The default is to limit SSH connections from a specific IP address if it attempts 6 or more connections within 30 seconds.

sudo ufw limit ssh/tcp

Set Accessible Ports

Allow 26656 for a p2p networking port to connect with the Tendermint network; unless you manually specified a different port.

sudo ufw allow 26656

Allow 1317 if you are running a public LCD endpoint from this node. Otherwise, you can skip this.

sudo ufw allow 1317

Allow 26657 if you are running a public RPC endpoint from this node. Otherwise, you can skip this.

sudo ufw allow 26657

Enable UFW Firewall

This enables the firewall you just configured.

sudo ufw enable

At any point in time you can disable your UFW firewall by running the following command.

sudo ufw disable
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