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IRIS software usually runs without issue on a network. However, in some instances where a firewall product has been installed a noticeable drop in performance can occur.
Firewalls filter traffic entering or leaving the computer. When connected to the Internet, information is flowing to and from the PC in a near-constant stream through the PC's ‘ports’. There are thousands of ‘ports’, acting like gates, letting information in and out.
There are commonly two types of firewall, hardware firewalls and software firewalls.
Large corporations, who access the Internet via a server, often install a hardware firewall. In addition, some broadband routers such as Netgear and Linksys have built in firewalls.
This article does not apply to Hardware Firewalls. Please refer to the documentation that accompanied the router for further details.
PC workstations as a standalone or as part of an Internet Security Suite often have Software firewalls installed. An example of this would be Zone Alarms although there are many alternatives.
If using IRIS in a standalone environment, it is unlikely that the installed firewall package is affecting the performance.
However, in SQL environments, if IRIS has been installed on a server or other workstation and is being accessed via a mapped drive, then the firewall package could be blocking/checking requests made across the internet.
Typically trying to send electronic transmissions from the IRIS software to HMRC may result in an error occurring.
Setting specific rules within the firewall software to allow communication through the desired ports should resolve the issue. Your own IT Support provider should be able to offer assistance with this.