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How to fix “550 Requested action not taken: mailbox unavailable or not local” in Plesk servers
Mail errors are commonly encountered issues in our role as Website support specialists. In Plesk Windows servers, the default mail server is MailEnable. Plesk account owners sometimes report the MailEnable error 'SMTP server response: 550 Requested action not taken:...
How to prevent SWEET32 Birthday Attacks on OpenVPN via Blowfish cipher vulnerability (CVE-2016-6329)
In our previous post, we saw how to secure your OpenSSL servers from SWEET32 Birthday Attack. But OpenSSL isn't the only server that's affected by this bug. Use of block cipher encryption algorithm makes OpenVPN servers also vulnerable to this attack. The OpenVPN...
SWEET32 Birthday Attack (CVE-2016-2183): Fix TLS vulnerability
Over 80% of websites on the internet are vulnerable to hacks and attacks. In our role as hosting support engineers for web hosts, we perform periodic security scans and updates in servers to protect them from hacks. A recent bug that affects the servers is...
Disable RC4 ciphers in cPanel/WHM servers – Why and How to do it?
Secure transmission of data requires encrypting the data in many ways. Ciphers are the tools used for data encryption. RC4 is one such cipher. RC4 generates a stream of pseudo-random bits. These bits are combined with plain text using 'bit-wise exclusive-or' pattern...
WordPress v4.5.3 vulnerable to Denial of Service (DoS) exploits via CVE-2016-6896 and CVE-2016-6897 – Here’s how to fix it
If your website runs on WordPress v4.5.3 website, attackers can now bring down your site through a Denial of Service attack. This is possible through two vulnerabilities that were disclosed on 22nd Aug: CVE-2016-6897 - This is a Cross Site Request Forgery...
How to mitigate VMware vIDM local privilege escalation vulnerability
VMWare has issued a latest security advisory VMSA-2016-0013, which addresses two critical vulnerabilities of VMWare products - CVE-2016-5335 and CVE-2016-5336. These are severe vulnerabilities that affect VMware Identity Manager and vRealize Automation software....
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