Trustwave Support (2024)

This article applies to:

  • WebDefend - All Versions

Question:

  • How do Idisable Diffie-Hellman Key Exchange in IIS (Windows web server)?
  • Diffie-Hellman key exchange is not supported by WebDefend

Procedure:

To control key exchange algorithms and protocols, you can set values in the Windows Registry.

  • Caution: As always, take due care when editing the Registry. Trustwave recommends that you back up the Registry before making any changes.

The settings provided below are for information only. You should confirm the applicability to your environment.

Windows Server 2003, Windows XP, Windows 2000

By default, Diffie-Hellman key exchange is enabled.

To disable Diffie-Hellman key exchange:

  1. RunRegedit
  2. To access Key Exchange algorithm settings, navigateto the following Registry location:
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\KeyExchangeAlgorithms
  3. For Diffie-Hellman, navigate to the subkey Diffie-Hellman
  4. Create, or edit, a DWORD value
    • Name: Enabled
    • Value Data: 0

Trustwave Support (1)

To re-enable Diffie-Hellman key exchange, set theHexadecimal value data of "Enabled"to 0xffffffff (or simply delete the "Enabled" value)

Windows Server 2008,Windows Server 2008 R2,Windows Server 2012

By default, Diffie-Hellman key exchange is enabled. (Other default configuration settings are such that this algorithm may never be selected.)

The procedures to disable the algorithm are slightly more complex due to differences in the Registry structure.

To disable Diffie-Hellman key exchange:

  1. RunRegedit
  2. To access Key Exchange algorithm settings, navigateto the following Registry location:
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SChannel\KeyExchangeAlgorithms
  3. Create a new sub key named Diffie-Hellman
  4. Within the key Diffie-Hellman, create a DWORD value
    • Name: Enabled
    • Value Data: 0

Trustwave Support (2)

To re-enable Diffie-Hellman key exchange, set theHexadecimal value data of "Enabled" to 0xffffffff (or simply delete the "Enabled" value)

Notes:

  • When you disable any algorithm, you disallow all cipher suites that use that algorithm.
  • See also Microsoft Knowledge Base article 245030:How to Restrict the Use of Certain Cryptographic Algorithms and Protocols in Schannel.dll

Trustwave Support (2024)

FAQs

What is Trustwave phishing? ›

The Trustwave SpiderLabs Phishing Service is a practical testing exercise to determine the organization's resiliency to the emergent attack vector of social engineering and phishing attacks.

What is Trustwave used for? ›

Cybersecurity firm Trustwave provides businesses with tools for data protection and risk reduction in the fight against digital crime.

Is Trustwave safe? ›

Trustwave MailMarshal's layered security reduces false positives and protects against spam, gateway attacks, viruses, phishing attempts, and malicious URLs.

Who is Trustwave owned by? ›

Trustwave is an American cybersecurity subsidiary of The Chertoff Group.

How do I check if a phishing link is safe? ›

To find out if a link is safe, just copy/paste the URL into the search box and hit Enter. Google Safe Browsing's URL checker will test the link and report back on the site's legitimacy and reputation in just seconds. It's that easy to use Google's URL scanner.

What is an example of a fake phishing link? ›

For example: The user is redirected to myuniversity.edurenewal.com, a bogus page appearing exactly like the real renewal page, where both new and existing passwords are requested. The attacker, monitoring the page, hijacks the original password to gain access to secured areas on the university network.

How much does Trustwave cost? ›

Based on our most recent analysis, Trustwave pricing starts at $43,775 (Annually).

Where is Trustwave located? ›

Trustwave Holdings, Inc., a company incorporated in the United States whose registered office is at 70 W. Madison St., Suite 600, Chicago IL 60602, its parent company, and its subsidiaries (together “Trustwave”, “we”, “us”, “our”), commits to maintaining the privacy, security, and accuracy of your personal data.

What is Trustwave email IP reputation service? ›

Trustwave Email IP Reputation Service. This website allows you to find out if an IP address is listed in the Trustwave Email IP Reputation Service database. To check an IP address, enter the IP address (normally your mail server's IP number) in the IP Address field, complete the CAPTCHA field, and then click Search.

Is Trustwave a good company? ›

Employees rate Trustwave 4 out of 5 stars based on 629 anonymous reviews on Glassdoor.

What is Trustwave link validator? ›

The Trustwave Link Validator is part of the Trustwave SEG Blended Threat Module. SEG rewrites URL links in email so that the links are passed to the Validator.

How many customers does Trustwave have? ›

Trustwave managed security services are trusted by more than 5,000 clients worldwide, including many of the world's best-known businesses and government agencies.

What is Trustwave security colony? ›

Security Colony is the CISO's best friend, an arsenal of potent, actionable, best practice knowledge at your finger tips starting at less than $10 a day, and a simple no-fuss pricing model. Users. Resource Library.

Is Trustwave an MSSP? ›

As a managed security services provider, Trustwave can help you expand your team's capabilities, strengthen your environment and become more resilient over time.

Is it safe to open a phishing link? ›

Do not click on any links. Malware-laden downloads aside, phishing websites can be made to look like familiar websites that you trust. Such look-alike websites are no more than overtures to steal your personal information. Contact the person from whom the message appears to have been sent.

How do I know if I have a phishing virus? ›

Look for: Unsolicited and suspicious messages, emails and social posts containing shortened links. Web pages that ask for login credentials or other sensitive information. Suspicious emails with uncharacteristic language.

Are phishing emails safe? ›

Phishing is a popular form of cybercrime because of how effective it is. Cybercriminals have been successful using emails, text messages, and direct messages on social media or in video games, to get people to respond with their personal information. The best defense is awareness and knowing what to look for.

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