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301 Moved Permanently - sybex.com
HTTP Status: 301
User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])
Date: Tue, 13 May 2025 23:26:01 GMT
Content-Type: text/html
Content-Length: 167
Connection: keep-alive
Cache-Control: max-age=3600
Expires: Wed, 14 May 2025 00:26:01 GMT
Location: /en-us/shop/sybex
Strict-Transport-Security: max-age=2592000; includeSubDomains
X-Content-Type-Options: nosniff
Server: cloudflare
CF-RAY: 93f5eb1dee4b8d9e-HEL
alt-svc: h3=":443"; ma=86400

HTTP Code 301 Moved Permanently

301 Moved Permanently means that the requested resource has been permanently moved to a new URL. All future requests should use the new address.

When is Code 301 used?

  • When changing a website domain
  • When modifying URL structures
  • When setting up redirects for SEO

What does Code 301 mean for the user?

The browser will automatically redirect the user to the new address, and search engines will update their indexes.

403 Forbidden - https://sybex.com/
HTTP Status: 403
User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])
Date: Tue, 13 May 2025 23:26:01 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 6771
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),autoplay=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="93f5eb1e1e748d9e"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Set-Cookie: __cf_bm=Vx1TRc8Ti7x78I0qlnEpPSkNq_fH_lo4O7qZ7cHeHfU-1747178761-1.0.1.1-0ibzG2F6TXCtMzFKCuq5JvCPzMSjYUAvnqz0Lx_qIs4P9ZXqsscYFrIN45Srp3HCPw6c0UGjxgkU1xhrgy.LWeIZymoX6dYsybrPy6xlRNE; path=/; expires=Tue, 13-May-25 23:56:01 GMT; domain=.www.wiley.com; HttpOnly; Secure; SameSite=None
Strict-Transport-Security: max-age=2592000; includeSubDomains
Server: cloudflare
CF-RAY: 93f5eb1e1e748d9e-HEL
alt-svc: h3=":443"; ma=86400

HTTP Code 403 Forbidden

403 Forbidden indicates that access to the requested resource is denied, even with authentication.

When is Code 403 used?

  • When accessing restricted content without necessary permissions
  • When security rules block a request
  • When an IP address is banned

What does Code 403 mean for the user?

The user is informed that they do not have permission to access the resource.

GET / HTTP/1.1
Host: sybex.com
Accept: */*
User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])

<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;max-width:60rem;padding-left:1.5rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{font-size:1.5rem;font-weight:500;line-height:2.25rem}@media (width <= 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Whois info of domain

Domain Name: SYBEX.COM
Registry Domain ID: 1183591_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.brandsight.com
Registrar URL: http://gcd.com
Updated Date: 2024-04-30T04:19:35Z
Creation Date: 1992-04-08T04:00:00Z
Registry Expiry Date: 2026-04-09T04:00:00Z
Registrar: GoDaddy Corporate Domains, LLC
Registrar IANA ID: 3786
Registrar Abuse Contact Email: [email protected]
Registrar Abuse Contact Phone: +1.5189669187
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Name Server: ALGIN.NS.CLOUDFLARE.COM
Name Server: RAFE.NS.CLOUDFLARE.COM
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2025-05-13T23:25:45Z <<<
For more information on Whois status codes, please visit https://icann.org/epp
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