General Network Guidelines

General Network Guidelines

Purpose

This document describes how to configure your network for use with OneCloud Services. Firewall and Network terminology varies between different venders so some language used may not fit with your exact configuration. This document does not cover the specifics of different firewall or switch vendors; If you need specific information regarding your firewall or switch you can check our other knowledgebase articles for commonly used equipment. If you have any questions or need additional assistance, please open a ticket at https://support.onecloud.us for clarification.

Terms

IP Network Alias – A group of IP addresses used in firewall rules for simpler firewall rules.

Voice Network – The network used by the physical phones, analog adapters, and session border controllers.

Data Network – The internal LAN network(s) used by users to access OneCloud from their computer.

SIP ALG – An Application Layer Gateway used by many modems and firewalls to modify SIP packets also known as “SIP Transformations”

Hybrid ports – This is a switch port that is configured with a native VLAN that sends untagged traffic as well as tagged VLANs.

Double NAT - Double NAT occurs when two or more routers on a network are performing Network Address Translation (NAT)


Firewall

  1. It is recommended that an IP Network Alias be created with all OneCloud IP addresses and used for the firewall rules however port filtering is also acceptable. For a current list of the OneCloud IP addresses please contact us at https://support.onecloud.us.
  2. The voice network should be configured so that the firewall does not modify the source port.
    1. This is generally called “Static port mapping” or “Consistent NAT”
  3. All SIP ALG services should be disabled.
  4. UDP connection timeout or state timeout should be configured for greater than 1 minute
  5. QoS should be configured to give priority to the phone traffic in the event of a saturated network. A good bandwidth assumption is 100Kbps per concurrent call, so if you expect to have 10 concurrent calls during the busiest time then a reservation of 1000Kbps or 1Mbps should be set for the Voice Network.
  6. No Double NAT
  7. Use the below tables for strict firewall policies on the voice network.

Ingress Traffic Allowed

This is traffic coming from the internet into your firewall. As all registration in initiated from the device; These rules are not generally needed for a stateful firewall but may be needed for Intrusion Prevention Systems.

 

Source IP

Source

Port

Destination IP

Destination

Port

Protocol

Description

OneCloud IP

Addresses

5060-

5069

Voice WAN

Any

UDP/TCP

SIP Signaling

OneCloud IP

Addresses

5090

Voice WAN

Any

UDP/TCP

SIP Signaling

OneCloud IP

Addresses

80

Voice and Data WAN

Any

TCP

HTTP

OneCloud IP

Addresses

443

Voice and Data WAN

Any

TCP

HTTPS

OneCloud IP

Addresses

8001

Voice and Data WAN

Any

TCP

WSS

OneCloud IP

Addresses

9002

Voice and Data WAN

Any

TCP

WSS

OneCloud IP

Addresses

20000-

29999

Voice and Data WAN

Any

UDP

RTP

Any

10000

Voice and Data

WAN

Any

UDP

Video Conference

Egress Traffic Allowed

This is traffic coming from your local area network to the internet.

 

Source IP

Source

Port

Destination IP

Destination

Port

Protocol

Description

Voice WAN

Any

OneCloud IP Addresses

5060-5069

UDP/TCP

SIP Signaling

Voice WAN

Any

OneCloud IP Addresses

5090

UDP/TCP

SIP Signaling

Voice and Data WAN

Any

OneCloud IP

Addresses

80

TCP

HTTP

Voice and Data WAN

Any

OneCloud IP

Addresses

443

TCP

HTTPS

Voice and Data WAN

Any

OneCloud IP Addresses

8001

TCP

WSS

Voice and Data WAN

Any

OneCloud IP

Addresses

9002

TCP

WSS

Voice and Data WAN

Any

OneCloud IP

Addresses

20000-29999

UDP

RTP

Voice and Data

WAN

Any

Any

10000

UDP

Video Conference

Local Area Network

  1. All phones, Session Border Controllers, and other devices using SIP to communicate with OneCloud services should be configured on a separate VLAN or physical network from other applications. Except in a few use cases, there is no reason for the Voice network and the Data network(s) to be routable.
  2. Most modern switches have dedicated settings for a voice VLAN and we recommend using these settings for your phone network.
  3. We recommend the following DSCP policies be applied to the switches. We understand that settings vary based on switch manufacturer and model.
    1. DSCP 46 should be the second highest policy
    2. DSCP 34 should be the third highest policy
  4. We recommend using Auto-VoIP, LLDP, or similar features to force the VoIP phones to the voice network automatically. If those technologies are not available, a DHCP boot option will need to be added to the default VLAN DHCP server.
  5. DHCP option 66 may be needed to tell the phones where to provision. You can open a ticket with support@telware.com to get the specific string for your phone model and services.
  6. The passthrough port can be used on the phones to allow computers access to the data network if the switches support hybrid ports with both tagged and untagged VLANs on the same port..

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