Host and Ports Documentation

Background:

TWS connects to our servers via port 4000 and 4001, if using SSL, and will not operate on any other port. If you are using a proxy server, it needs to be a transparent with both inbound and outbound ports open so that the TWS can function properly.

Below are listed all the gateways, along with the corresponding destination host that might be used by the TWS when you use our services, please allow access to those hosts.

The easiest way to test whether your connection needs any special setup or has been configured properly is to use our Dedicated Test page, which will provide a dynamic test of your network’s connection against our main trading and market data servers. If a “Success” response is returned, there is nothing more for you to do. If the response is “Failure”, we recommend adding an exception for the new hosts to your network’s configuration or review your changes.

If your network uses a browser proxy, the test page can produce false positives. In this case, or if you are not sure what your network setup is, turn to your network administrators, who can perform ping and telnet tests to the hosts listed below to confirm compliance with the connectivity requirements.

Specs: Client Portal and Website

Region/Product Server (Host) Ports
IBKR WEBSITE – AMERICA www.interactivebrokers.com 443
IBKR WEBSITE – Canada www.interactivebrokers.ca 443
IBKR WEBSITE – UK www.interactivebrokers.co.uk 443
IBKR WEBSITE – INDIA2 www.interactivebrokers.co.in 443
IBKR WEBSITE – JAPAN2 www.interactivebrokers.co.jp 443
IBKR WEBSITE – HONG KONG2 www.interactivebrokers.com.hk 443
IBKR WEBSITE – CHINA2 www.ibkr.com.cn 443
IBKR WEBSITE - AUSTRALIA www.interactivebrokers.com.au 443
CLIENT PORTAL – EAST gdcdyn.interactivebrokers.com 443
CLIENT PORTAL – CENTRAL cdcdyn.interactivebrokers.com 443

1: Standard Communication: TCP Port 80 | SSL Communication: TCP Port 443.

2: This Server host does not support ping request.

If you are accessing Client Portal from a corporate network where the Internet access is provided through a load balancing equipment, you may receive error messages about expired/invalid session and/or missing web content upon or after the login phase. The load-balancer cycles your outbound connections over two or more network interfaces to equalize the network workload. Because of this mechanism, your HTTP requests reach our systems from different IP addresses, invalidating your Client Portal session. In this scenario, as a solution, please ask your network administrator or IT group to configure your machine/device for bypassing the load-balancer. This will allow your session to remain valid and alive.

Specs: Desktop TWS

REGION/TOOL PRIMARY/BACKUP SERVER (HOST) PORTS
TWS AMERICA – EAST

Primary

Backup

ndc1.ibllc.com

ndc1_hb1.ibllc.com

4000 / 4001
TWS AMERICA – CENTRAL

Primary

Backup

cdc1.ibllc.com

cdc1_hb1.ibllc.com

4000 / 4001
TWS EUROPE

Primary

Backup

zdc1.ibllc.com

zdc1_hb1.ibllc.com

4000 / 4001
TWS ASIA

Primary

Backup

hdc1.ibllc.com

hdc1_hb1.ibllc.com

4000 / 4001
TWS ASIA - CHINA3

Primary

Backup

mcgw1.ibllc.com.cn

mcgw1_hb1.ibllc.com.cn

4000 / 4001
TWS AUTO-UPDATE PRIMARY

download.interactivebrokers.com

download2.interactivebrokers.com

443
RISK NAVIGATOR PRIMARY risk.interactivebrokers.com 443
TWS CLOUD SETTINGS PRIMARY s3.amazonaws.com 443
IB CAM PRIMARY ndc1.ibllc.com 4000 / 4001
DIAGNOSTICS REPORTS PRIMARY https://wit1.interactivebrokers.com 443

3: Gateway dedicated to clients with accounts assigned to the Hong Kong server, but are physically connecting from Mainland China.