ZyXEL Communications EXTRASMART ES-1528 Handbuch

ZyXEL Smart Switch ES-1500 Series

(Auto DoS Prevention & Auto VoIP)

Ethernet Switch

Support Notes

Version 1.01

March 2007

Smart Switch Support Note

Overview of ZyXEL ES-1500 Series Switch

The ZyXEL ES-1500 SERIES SWITCH is a solution for workgroup and

enterprise users, and is designed for easy installation, high performance, and

seamless migration between 10Base-T, and 100Base-TX network speeds. The

switch includes 24 10/100 auto-negotiation, 2x 10/100/1000M auto-negotiation,

and 2x Giga-MiniSFP ports. They are all auto-MDI/MDIX ports and provide a

flexible, reliable, and affordable solution for an Ethernet network. Each port

delivers up to 200 Mbps or 2000Mbps throughput, which can give workstations

a larger, congestion-free data pipe for simultaneous access to the server or

backbone. The ES-1500 SERIES SWITCH features embedded advanced

management capabilities: the device can be managed via a user friendly

web-based user interface and thereby allowing the system manager to monitor

and control the system efficiently. In addition, ZyXEL ES-1500 SERIES

SWITCH can be expanded by cascading two or more switches together. The

switch is also ideal for micro-segmenting large networks into smaller,

connected subnets for improved performance, thereby enabling the bandwidth

required by today's networks for increasingly demanding applications of all

kinds. The switch is plug-and-play with no software to configure, and the

built-in universal power supply lets you easily install the switch without an

external power adapter.

Smart Switch Support Note

Scenario

In our scenario, we have connected two SIP VoIP Phones and a PC to the

ZyXEL Extra Smart Switch. We want to make sure that all Voice over IP traffic

gets the highest priority on the Switch. Moreover, we want to make sure that

Denial of Service attacks will be blocked at this access Switch in case there

are attacks from the internal side.

Smart Switch Support Note

Exclusive new feature on Extra Smart Switch

Auto Voice over VoIP

Voice over Internet Protocol (VoIP) allows telephone calls to be made using a

computer network over a data network like the Internet. With the increased

prominence of delay-sensitive applications (voice, video, and other multimedia

applications) deployed in networks today, proper QoS configuration ensures

high-quality application performance.

The Auto VoIP feature is intended to provide an easy classification mechanism

for voice packets so that they can be prioritized above data packets in order to

provide better QoS. The AutoVoIP module explicitly matches VOIP streams in

the ZyXEL ES-1500 SERIES SWITCH and provides them with a better class of

service than ordinary traffic. The AutoVoIP module provides the capability to

assign the highest priority for the following VoIP packets:

SIP–Session Initiation Protocol

MGCP–Media Gateway Control Protocol

SCCP–Skinny Client Control Protocol

* It can support maximum 60 bi-directional VoIP streams at the same time.

Auto DoS Prevention

Denial-of-service (DoS) attack prevention is a method of preventing an attack

on a computer system or network that causes a loss of service to users.

Typically, a DoS attack causes the loss of network connectivity and services by

consuming the bandwidth of the victim network or overloading the

computational resources of the victim’s system.

With our current firmware release, we can prevent the follow DoS attacks.

1. Prevent Land Attacks

2. Prevent Blat Attacks

3. Scan SYNFIN

4. Prevent Smurf Attacks

5. Prevent Ping Flooding

6. Prevent SYN/SYN-ACK Flooding

It is recommended to active these attack preventions if it is implementing as an

access layer Switch.

Smart Switch Support Note

To configure Auto Voice over VoIP via Web on ZyXEL

ES-1500 Series Switch

1. Connect port 1 with a PC or Notebook via the RJ45 Cable.

2. By default the MGMT IP of every single port is 192.168.1.1/24

3. Set your NIC to 192.168.1.2/24

4. Open an Internet browser such as IE and give http://192.168.1.1 on

the URL.

5. By default you will need to put “admin” as the username and “admin”

as the password.

6. After you login successfully, you will see a similar screen like below.

7. Since it is an Extra Smart Switch, It is very simple to active “Auto VoIP”

on the Switch. First, click “Auto VoIP” on your left menu.

Smart Switch Support Note

8. Currently, it has one “IP Phone” profile built-in and you can just simply

choose this profile and the Switch will explicitly match Voice over IP

(VOIP) streams and provide them with a better class of service than

ordinary traffic. The Auto-VoIP module will provide the capability to

assign the highest priority for the following VoIP packets:

SIP : Session Initiation Protocol

MGCP : Media Gateway Control Protocol

SCCP : Skinny Client Control Protocol

Finally. click “Apply to save your changes.

Smart Switch Support Note

To configure Auto DoS Prevention via Web on

ZyXEL ES-1500 Series Switch

1. Connect port 1 with a PC or Notebook via the RJ45 Cable.

2. By default the MGMT IP of every single port is 192.168.0.234/24

3. Set your NIC to 192.168.0.2/24

4. Open an Internet browser such as IE and give http://192.168.0.234 on

the URL.

5. By default you will need to put “admin” as the username and “admin”

as the password.

6. After you login successfully, you will see a similar screen like below.

7. First of all, we need to active “Auto DoS” prevention on the Switch. To

do so, click “Auto DoS” on your left menu.

Smart Switch Support Note

8. To enable all options on protecting DoS attack, click the “Select All”

checkbox. And click “Apply”.

9. Moreover, we can enable the options inside the “Advanced” tab as well.

To do so, click on the “Advanced”

Smart Switch Support Note

10.To have maximum protection, it is recommend having all options

enabled and applying them to all ports. Finally. Click “apply” to save

your changes.

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