How to setup WFilterROS to work with a three layer switch in a multiple VLANs network?

In this article, I’m going to walk you through setting up a two-VLAN network with a Layer 3 switch(Cisco 3550). I am also going to setup WFilterROS as the gateway to routing for this VLANs.

Network Topology


As in the above network topology diagram:

  1. There are two VLANs in the Cisco 3550 swith( Vlan2 –, and VLAN3 –
  2. WFilterROS is in subnet
  3. The uplink port of Cisco 3550 has IP address

Configuring the Cisco switch

Commands to setup the Cisco 3550 switch:

Setup port VLAN

Switch#configure terminal

Switch(config)#interface fa0/12

Switch(config-if)#switchport mode trunk

Switch(config-if)#switchport access vlan 2


Setup VLAN IP and subnet

Switch#configure terminal

Switch(config)#interface vlan 2

Switch(config-if)#ip address


Setup the uplink port

Switch#configure terminal

Switch(config)#interface fa0/1

Switch(config-if)#no switchport

Switch(config-if)#ip address

Enable IP Routing

Switch#configure terminal

Switch(config)#ip routing


Configuring WFilterROS

For WFilterROS to routing VLANs traffic, you need to add VLAN subnets in “Routing” of WFilterROS.

threelayer_vlan_ros2_en threelayer_vlan_ros1_en


Facebook Comments

How to detect and fix ip conflicts in your network?

IP conflict in local network is annoying. When it happens, it will cause intermittently connections, and it’s difficult for an IT administrator to locate the conflicted devices.

With WFilter, you can do much more.

First, you can block the conflicted IP address with a message. So the client might fix this issue by himself. As shown in below figure, you can send a message “Your ip address conflicts with our server, please correct it ASAP”. This message will show up when browsing http sites.
Also, you can run the “Network Health Checker” extension, which can test ip conflicts in your network. Please check the below screenshots:

Now you may talk to the person with “HuaWei” mobile to fix this issue.

Extension home page: “Network Health Checker”

Wiki page: Check network health of availability, IP conflict, ARP spoof and broadcast storm

Facebook Comments

The ISP module of WFilterROS, a total solution for ISP management.

For ISP network management, you will need:

  1. User authentication.
  2. Monitor and filter of internet activities.
  3. Bandwidth shaper.
  4. Accounting and statistics.

Usually, you will need several systems to achieve this goal. Today, WFilterROS, a linux based router OS provides a total solution for ISP network management, with below features:

  1. Two types of authentication: “Web Auth” and “PPPoE Auth”.
  2. An “Internet Usage” module to record web surfing, downloading activities.
  3. Rich internet access control policies: web filter, application control, ip-mac binding …
  4. Bandwidth policies of realtime rate limit and monthly bandwidth cap limit.
  5. Bandwidth optimize solutions.
  6. Internet usage and bandwidth statistics.
  7. A web push feature to push statistics, web page and advertise.

All these features can be configured in the “WFilter ISP module“.

Some screenshots:


User settings

User Portal

More details can be found at here: WFilterROS ISP Module

Facebook Comments

Do not forget to block QUIZ to block youtube and other google sites.

In google chrome, a new protocol named QUIZ, is implemented. The protocol description can be found at

It says QUIZ can improve website performance by 3%. However, because QUIZ is an UDP based encrypted protocol,  domains support QUIZ will not be blocked with WFilter’s web filter.

This issue happens in Chrome browser to Google sites only(including youtube). To make web filter working, you’re recommended to block QUIZ completely.

In pass-by deployment with WFilter Enterprise, you’re recommended to block udp ports “443 -65534″ in your firewall and router.

In WFilterROS, you can block QUIZ in the “app control” module.

Demonstrations of blocking youtube.

When QUIZ is not blocked, you can only see QUIZ traffic when visiting of youtube with chrome.


Block QUIZ in app control.


Now “QUIZ” connections are all blocked, and youtube can be blocked by WFilter.



Facebook Comments