"...Lync-Solutions, an enterprise security developer, announced its new addition to the Security Web Filter for Microsoft Forefront Threat Management Gateway (TMG) 2010, the Enterprise Edition of the Security Web Filter. A leading Microsoft Lync Architect Fabian Kunz noted, Lync-Solutions provides innovative enterprise security solutions to protect Lync Server from DoS attacks, XSS attacks, malicious SOAP requests and unauthorized mobile device access. The Security Filters product line offers a network perimeter security solution for enterprises to protect Lync traffic from external attacks. This product line solution continues to grow more and more comprehensive.”
As companies increasingly adopt unified communications and collaboration systems to connect employees, partners, and customers in real time and improve productivity, cybercriminals gain new opportunities to block legitimate corporate users from accessing internal corporate IT resources or access corporate secrets.
Figure 1 illustrates the multiple paths an external attacker can gain access to the internal Lync Servers. The attacker can lockout user accounts in Active Directory preventing internal users from connecting to Lync Server, mount DoS and SPIM attacks or introduce viruses through file transfers..."
For more information, check out http://www.telecomreseller.com/2013/05/31/lync-security-solution-enhanced/