---
title: 'LFD Clustering'
url: 'https://docs.danami.com/juggernaut/settings/login-failure-daemon/lfd-clustering'
markdown: 'https://docs.danami.com/juggernaut/settings/login-failure-daemon/lfd-clustering.md'
date: '2026-09-24'
description: 'Cluster send to - CLUSTER_SENDTO The cluster member IP addresses to send requests to (comma separated). Default: empty Cluster receive from - CLUSTER_RECVFROM The cluster member IP addresses to receive requests from (comma separated). Default: empty Cluster master IP address - CLUSTER_MASTER IP a…'
taxonomy:
  category:
    - docs
  tag:
    - clustering
---

[](#)  [ Basics ](https://docs.danami.com/juggernaut/)     [ Settings Reference ](https://docs.danami.com/juggernaut/settings)     [ Login Failure Daemon ](https://docs.danami.com/juggernaut/settings/login-failure-daemon)      LFD Clustering    

# LFD Clustering

**Cluster send to** - `CLUSTER_SENDTO`
The cluster member IP addresses to send requests to (comma separated).
Default: empty

**Cluster receive from** - `CLUSTER_RECVFROM`
The cluster member IP addresses to receive requests from (comma separated).
Default: empty

**Cluster master IP address** - `CLUSTER_MASTER`
IP address of the master node in the cluster allowed to send CLUSTER\_CONFIG changes.
Default: empty

**Public IP of this server (NAT)** - `CLUSTER_NAT`
The public IP address of this server (For servers behind a NAT).
Default: empty

**Local IP address to send from** - `CLUSTER_LOCALADDR`
Send requests on an IP other than the default IP
Default: empty

**Cluster port** - `CLUSTER_PORT`
The cluster communication port (must be the same on all cluster member servers). There is no need to open this port in the firewall as the firewall will automatically add in and out bound rules to allow communication between cluster members.
Default: 7777

**Cluster encryption key** - `CLUSTER_KEY`
The secret key used to encrypt cluster communications using the Blowfish algorithm. It should be between 8 and 56 characters long.
Default: empty

**Cluster block** - `CLUSTER_BLOCK`
Automatically send login failure blocks to all members of CLUSTER\_SENDTO. Those servers must have this servers IP address listed in their CLUSTER\_RECVFROM.
Default: 1 Range: 0-1

**Cluster config** - `CLUSTER_CONFIG`
Allow cluster configuration options to be received.
Default: 0 Range: 0-1

**Cluster children** - `CLUSTER_CHILDREN`
The maximum number of child processes to listen on. High blocking rates or large clusters may need to increase this.
Default: 10 Range: 1-100

## Related Pages

- [LFD Clustering](https://docs.danami.com/juggernaut/user-guide/lfd-clustering "LFD Clustering")

 [ ](https://docs.danami.com/juggernaut/command-line-interface/lfd/lfd-clustering)

---

## Navigation

- Parent: [Login-failure-daemon](https://docs.danami.com/juggernaut/settings/login-failure-daemon.md)
- Previous: [Messenger Service](https://docs.danami.com/juggernaut/settings/login-failure-daemon/messenger-service.md)
- Next: [Log Scanner](https://docs.danami.com/juggernaut/settings/login-failure-daemon/log-scanner.md)