---
title: 'Port / IP Redirection'
url: 'https://docs.danami.com/juggernaut/user-guide/port-ip-redirection'
markdown: 'https://docs.danami.com/juggernaut/user-guide/port-ip-redirection.md'
date: '2026-09-22'
description: 'Port / IP redirection allows you to direct traffic to alternative ports/IP addresses. It is controlled by the file /etc/csf/csf.redirect DNAT Formats Redirect from one IP address to a different one: IPx|*|IPy|*|tcp/udp - To IPx redirects to IPy IPx|portA|IPy|portB|tcp/udp - To IPx to port…'
taxonomy:
  category:
    - docs
  tag:
    - csf
---

[](#)  [ Basics ](https://docs.danami.com/juggernaut/)     [ User Guide ](https://docs.danami.com/juggernaut/user-guide)      Port / IP Redirection    

# Port / IP Redirection

Port / IP redirection allows you to direct traffic to alternative ports/IP addresses. It is controlled by the file `/etc/csf/csf.redirect`

## DNAT Formats

Redirect from one IP address to a different one:

```
IPx|*|IPy|*|tcp/udp          - To IPx redirects to IPy
IPx|portA|IPy|portB|tcp/udp  - To IPx to portA redirects to IPy portB
```

## DNAT examples

```
203.0.113.1|*|10.0.0.1|*|tcp
203.0.113.1|666|10.0.0.1|25|tcp
```

## REDIRECT

Redirect from port to a different one:

```
IPx|portA|*|portB|tcp/udp    - To IPx to portA redirects to portB
*|portA|*|portB|tcp/udp      - To portA redirects to portB
```

## REDIRECT examples

```
*|666|*|25|tcp
203.0.113.60|666|*|25|tcp
203.0.113.4|666|*|25|tcp
```

> > > > > • Where a port is specified it cannot be a range, only a single port.
> > > > > • All redirections to another IP address will always appear on the destination server with the source of this server, not the originating IP address.
> > > > > • This feature is not intended to be used for routing, NAT, VPN, etc tasks.
> > > > > • `/proc/sys/net/ipv4/ip_forward` must be set to 1 for DNAT connections to work. CSF will set this where it can, but if the kernel value cannot be set then the DNAT redirection many not work.

## Related Files

| File | Description |
|---|---|
| `/etc/csf/csf.redirect` | This file contains a list of port and/or IP address assignments to direct traffic to alternative ports/IP addresses. |

## Related Pages

- [Watching IP Addresses](https://docs.danami.com/juggernaut/user-guide/watching-ip-addresses "Watching IP Addresses")
- [External Pre and Post Scripts](https://docs.danami.com/juggernaut/user-guide/external-pre-and-post-scripts "External Pre and Post Scripts")
- [Firewall](https://docs.danami.com/juggernaut/user-guide/firewall "Firewall")
- [Disable Server IP Addresses](https://docs.danami.com/juggernaut/user-guide/disable-server-ip-addresses "Disable Server IP Addresses")
- [Binary Locations](https://docs.danami.com/juggernaut/settings/other/binary-locations "Binary Locations")

 [ ](https://docs.danami.com/juggernaut/user-guide/watching-ip-addresses) [](https://docs.danami.com/juggernaut/user-guide/disable-server-ip-addresses)

---

## Navigation

- Parent: [User Guide](https://docs.danami.com/juggernaut/user-guide.md)
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