en
Đại học Đà Nẵng
IndustryOriginGlobal rankRank in Vietnam
Updated at The higher the score, the more externally observable protections the system has recorded. This page does not certify that the website is reputable, legitimate, or completely free of vulnerabilities.
As of September 12, 2026 at 16:18, www.dongcobiogas.udn.vn has a security score of 59/100 (grade F – “Low”). CyStack’s automated assessment recorded 7 issues to review after completing 96.7% of applicable checks. The website owner should address “Certificate matches the website” first, then review the remaining items in order of impact.
At assessment time, CyStack did not find www.dongcobiogas.udn.vn or related infrastructure on any scam, phishing, or malware warning list after checking 5 online reputation sources. This result reflects external observations; it does not guarantee absolute safety or verify the organization’s legal status or reputation.
Addresses, servers and services that are visible from the Internet.
Frequently asked questions
A valid SSL certificate still does not prove that www.dongcobiogas.udn.vn is safe, legitimate, or free of scam signals. For a more complete assessment, this report also checks phishing and malware, exposed email records, IPs and open ports, subdomains, technologies, and CVEs that may apply to observed versions.
HTTPS on www.dongcobiogas.udn.vn presented a certificate that was invalid or failed verification. The operator should review its validity dates, domain names, and trust chain.
Review HTTPS and certificateData sources
CyStack compiles scan results from its internal cybersecurity monitoring systems, including CyStack VulnScan and CyStack Threat Intelligence, together with publicly available Internet data. The assessment only observes and analyzes information already available; it does not attempt unauthorized access, test passwords, send exploit code, or change or disrupt the assessed system.
CyStack VulnScan continuously discovers assets, validates vulnerabilities, and helps security teams prioritize remediation across the enterprise.
These 3 failed checks or warnings have the greatest impact on the result for www.dongcobiogas.udn.vn.
Why it matters
The certificate must list the exact hostname visitors requested in its Subject Alternative Names (SAN). A mismatch produces browser warnings because the certificate may belong to a different service.
What to do
Issue and deploy a certificate whose SAN list includes every public hostname served by this website address.
Diagnostic information
The available certificate evidence was not sufficient to conclude this certificate requirement.
Evidence and check scope
Why it matters
Older services such as Telnet, FTP, and unencrypted mail or directory protocols can send passwords and data in readable form. Anyone able to observe the network path may capture them.
What to do
Disable the legacy service or replace it with an encrypted alternative such as SSH, SFTP, HTTPS, or the secure version of the mail protocol.
Why it matters
DMARC lets the domain owner tell receiving services what to do when the visible From address is not verified by SPF or DKIM. Without DMARC, attackers have more opportunity to impersonate the domain in phishing email.
What to do
Publish a DMARC record at _dmarc, begin by collecting reports, and confirm that legitimate senders pass before applying a blocking policy.
Evidence and check scope
Each public IP is grouped with its open services, identified products and any CVEs that may apply to the observed version.
103.68.251.199sv1199.powernet.vn
Pure FtpdPure FtpdVersion not visible
DovecotVersion not visibleNo record associated with an @udn.vn email address was found in the currently available data. This does not rule out incidents that have not been observed.
Review exposed email recordsThe assessment identified 9 technologies on www.dongcobiogas.udn.vn and completed CVE comparison for all 1 identified versions; no matching CVE was found for those versions. This does not mean the entire website is free of vulnerabilities.
Review technologies and CVEsThe assessment observed 1 public IPs and 11 open ports for www.dongcobiogas.udn.vn. An open port is not the same as a vulnerability, but the website owner should keep every public service updated and appropriately restrict access.
Review IPs and open portsThe assessment observed 524+ public subdomains of udn.vn. This list can reveal additional entry points such as APIs, administration systems, or test environments, but it does not mean that every subdomain is risky.
Review discovered subdomainsEvidence and check scope
References
EximExim4.100Product not identified
nginxnginxVersion not visibleDovecotDovecotVersion not visibleProduct not identified
NginxNginxReverse Proxies · Web ServersVersion not visibleNginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
nginx.org/enEximExim4.100EximExim4.100Product not identified
DovecotDovecotVersion not visibleRecently completed assessments, prioritizing websites with a similar sector, country or security grade for easier comparison.
Vietnam
