admin.com
UNIX and Linux System Administration Handbook, Fifth Edtion

!No H1 Tag

Home page for the book UNIX and Linux System Administration Handbook by Nemeth, Snyder, Hein, Whaley, and Mackin

UNIX system administration, Linux system administration, Evi Nemeth, Trent R. Hein, Ben Whaley, Garth Snyder, Dan Mackin

Technical Rating

XSS attack - not protected. HTTP header "X-XSS-Protection" not found

User Interface redress attack - not protected. HTTP header "X-Frame-Options" not found

HTTP request response - 200

HTTPS request response - 200

Redirect from HTTP to HTTPS

iHTTP redirect: https://admin.com/

Server response time 0,52 sec

HTML load time 0,398 sec

iHTML length: 28427

!Favicon link not found

iNumber of IMGs: 20

The ALT attribute is set for all IMGs

!Not adapted for mobile devices. It doesn't use the VIEWPORT tag

W3C Validation. Number of HTML warnings: 5

!Doesn't use robots.txt

!Doesn't use a sitemap

DNS MX record is available. Anti-spam DMARC and ADSP records are available

Exact physical location of Admin.com

iUS Seattle 410 Terry Ave N.

Amazon.com Invictus, 410, Terry Avenue North, South Lake Union, Belltown, Seattle, King County, Washington, 98109-5210, United States

Technical Information

iServer: AmazonS3

iAdmin.com created 30 year(s) 3 month(s) 15 day(s) ago (1994-11-17)

iRegistration period ends in 8 month(s) 26 day(s) (2025-11-16)

iAdmin.com is registered in the AMAZON REGISTRAR, INC.

iAdmin.com registered to On behalf of admin.com owner

iСontacts: [email protected]

iNameservers: ns-1424.awsdns-50.org, ns-1830.awsdns-36.co.uk, ns-89.awsdns-11.com, ns-902.awsdns-48.net

iIPv4: 13.227.220.31, 13.227.220.3, 13.227.220.51, 13.227.220.70

iDNS TXT Records: "v=spf1 -all"

iDNS Mail Records: 10 localhost.admin.com.

iDMARC Mail Anti Spam Records: 143.204.98.75, 143.204.98.91, 143.204.98.64, 143.204.98.36

iAuthor Domain Signing Practices Mail Records: 13.227.220.70, 13.227.220.51, 13.227.220.3, 13.227.220.31

iRaw DNS Information

A: 13.227.220.31
A: 13.227.220.3
A: 13.227.220.51
A: 13.227.220.70

TXT: "v=spf1 -all"

MX: 10 localhost.admin.com.

DMARC: 143.204.98.75
DMARC: 143.204.98.91
DMARC: 143.204.98.64
DMARC: 143.204.98.36

ADSP: 13.227.220.70
ADSP: 13.227.220.51
ADSP: 13.227.220.3
ADSP: 13.227.220.31