---
title: 'Multiple Ethernet Devices'
url: 'https://docs.danami.com/juggernaut/user-guide/multiple-ethernet-devices'
markdown: 'https://docs.danami.com/juggernaut/user-guide/multiple-ethernet-devices.md'
date: '2026-09-22'
description: 'If you have multiple ethernet NICs that you want to apply all rules to, then you can set ETH_DEVICE or ETH6_DEVICE (for ipv6) in /etc/csf/csf.conf to the interface name immediately followed by a plus sign. For example, eth+ will apply all iptables rules to eth0, eth1, etc. If you leave ETH_DE…'
taxonomy:
  category:
    - docs
  tag:
    - interfaces
---

[](#)  [ Basics ](https://docs.danami.com/juggernaut/)     [ User Guide ](https://docs.danami.com/juggernaut/user-guide)      Multiple Ethernet Devices    

# Multiple Ethernet Devices

If you have multiple ethernet NICs that you want to apply all rules to, then you can set `ETH_DEVICE` or `ETH6_DEVICE` (for ipv6) in `/etc/csf/csf.conf` to the interface name immediately followed by a plus sign. For example, eth+ will apply all iptables rules to eth0, eth1, etc.

> > > > > > If you leave `ETH_DEVICE` blank all rules will be applied to all ethernet devices equally.

## Related Files

| File | Description |
|---|---|
| `/etc/csf/csf.conf` | `ETH_DEVICE` `ETH6_DEVICE` configuration options. |

## Related Pages

- [General Settings](https://docs.danami.com/juggernaut/settings/firewall/general-settings "General Settings")

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

---

## Navigation

- Parent: [User Guide](https://docs.danami.com/juggernaut/user-guide.md)
- Previous: [Advanced Allow / Deny Filters](https://docs.danami.com/juggernaut/user-guide/advanced-allow-deny-filters.md)
- Next: [Messenger Service](https://docs.danami.com/juggernaut/user-guide/messenger-service.md)