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OpenDNS filters what they consider might be problematic. Remote control software certainly fits the bill. <br />
<br />
If you want customised, granular and more secure filtering, then you will need some other product. &quot;Next Generation Firewalls&quot; from SonicWALL, Cisco, Fortinet, WatchGuard ect can allow this. <br />
<br />
As a &quot;quick and dirty&quot; workaround, you could populate each machines HOSTS file with the DNS entries required by Teamviewer, and whatever other services you need exceptions for. <br />
<br />
<a href="https://support.rackspace.com/how-to/modify-your-hosts-file/" rel="ugc">https://support.rackspace.com/how-to/modify-your-hosts-file/</a>
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You can change DNS settings to 8.8.8.8 for the time of the job.
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Easiest option is to stop using OpenDNS.<br />
<br />
If you have DNS server in your network, the just use root hints.<br />
<br />
Otherwise, change to your ISP or Google or whoever.<br />
<br />
Alan.
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I use open DNS and teamviewer works for me. &nbsp;Are you using a paid-for service to filter traffic?
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I whitelist Teamviewer domains<br />
<br />
@Alan @Olgierd Ungehojer I use opendns for restricting employees to certain category’s. Also its safer using opendns then 8.8.8.8 protecting from internet hijacking<br />
<br />
@ John I also did not have any issue till last week its seems thy did a update and blocked it under video sharing<br />
<br />
Thank you all for your help
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<div class="content wysiwyg-content">
Suddenly teamviewer could not connect to internet (at my client computers) so I could not establish a connection to my client after hours of investigating I figured out the its OpenDNS that blocks it.<br />
(what leaded me to that direction I had send a link to teamviewer in a email to the client and it was blocked by openDNS<br />
<br />
Any idea what I can do to solve this issue. I want to keep the computers filtered.
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Suddenly teamviewer could not connect to internet (at my client computers) so I could not establish a connection to my client after hours of investigating I figured out the its OpenDNS that blocks it.
(what leaded me to that direction I had send a link to teamviewer in a email to the client and it was blocked by openDNS

Any idea what I can do to solve this issue. I want to keep the computers filtered.

OpenDNS block teamviewer to establish a connection

Remote access may refer to the connection to a data-processing system from a remote location, for example through a virtual private network remote desktop software, terminal emulation, or the activation of features of a business telephone system from outside the business's premises.

Remote Access

This topic area includes legacy versions of Windows prior to Windows 2000: Windows 3/3.1, Windows 95 and Windows 98, plus any other Windows-related versions including Windows Mobile.

Windows OS

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.

Networking

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.

Security is the protection of information systems from theft or damage to the hardware, the software, and the information on them, as well as from disruption or misdirection of the services they provide. The main goal of security is protecting assets, and an asset is anything of value and worthy of protection.  Information Security is a discipline of protecting information assets from threats through safeguards to achieve the objectives of confidentiality, integrity, and availability or CIA for short. On the other hand, disclosure, alteration, and disruption (DAD) compromise the security objectives.

Security

Network security consists of the policies adopted to prevent and monitor authorized access, misuse, modification, or denial of a computer network and network-accessible resources. Network security involves the authorization of access to data in a network, and covers a variety of computer networks; conducting transactions and communications among businesses, government agencies and individuals. Networks can be private, such as within a company, and others which might be open to public access.