<div>
<div class="content wysiwyg-content">
Hi,<br />
one of the new apps we recently installed requested outbound access to port 53 be opened on firewall. &nbsp;Since this port is used for dns, wouldnt this port already be opened or else dns would not be working for network? &nbsp;I have tested to check if an inbound port is open by using canyouseeme.org but how would i test if port 53 is open? &nbsp;If i wanted to test 443 for instance i would try to access an https website and if unable then i know port 443 not open for outbound so how would &nbsp;i do this for port 53? &nbsp;Thanks.
</div>
</div>


Hi,
one of the new apps we recently installed requested outbound access to port 53 be opened on firewall.  Since this port is used for dns, wouldnt this port already be opened or else dns would not be working for network?  I have tested to check if an inbound port is open by using canyouseeme.org but how would i test if port 53 is open?  If i wanted to test 443 for instance i would try to access an https website and if unable then i know port 443 not open for outbound so how would  i do this for port 53?  Thanks.

outbound access to port 53 dns

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).

Windows Server 2003

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.

Hardware-based firewalls provide more sophisticated protection for inbound and outbound traffic than the simple Windows software firewall or the basic NAT firewalls found in routers. These devices implement techniques such as stateful packet inspection, deep packet inspection, and content filtering; and may include built-in antivirus and anti-malware protection.