[BUG] Unable to install Claude Code
Preflight Checklist
- [x] I have searched existing issues and this hasn't been reported yet
- [x] This is a single bug report (please file separate reports for different bugs)
- [x] I am using the latest version of Claude Code
What's Wrong?
When I use the quickstart native install command: curl -fsSL https://claude.ai/install.sh | bash
I am receiving:
curl: (28) Failed to connect to claude.ai port 443 after 136140 ms: Couldn't connect to server
Internet works from EC2.
Anthropic API works.
Only claude.ai:443 is hanging:
curl -4 -I https://google.com --connect-timeout 10
HTTP/2 301
location: https://www.google.com/
content-type: text/html; charset=UTF-8
content-security-policy-report-only: object-src 'none';base-uri 'self';script-src 'nonce-yNEj8t9o3et3RPpaXVyX3g' 'strict-dynamic' 'report-sample' 'unsafe-eval' 'unsafe-inline' https: http:;report-uri https://csp.withgoogle.com/csp/gws/other-hp
date: Wed, 17 Jun 2026 17:43:37 GMT
expires: Fri, 17 Jul 2026 17:43:37 GMT
cache-control: public, max-age=2592000
server: gws
content-length: 220
x-xss-protection: 0
x-frame-options: SAMEORIGIN
alt-svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
curl -4 -I https://api.anthropic.com --connect-timeout 10
HTTP/2 404
date: Wed, 17 Jun 2026 17:43:45 GMT
vary: Accept-Encoding
server: cloudflare
cf-cache-status: DYNAMIC
set-cookie: _cfuvid=relmUS7vC3XYkUoMBKZytqi7r6fzVtMrDEAulT_cZmE-1781718225.7066102-1.0.1.1-uk9aJiuDYEjYpuV0HIaHNhPPwMJTk7Ra.SLfGtW5uTQ; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com
content-security-policy: default-src 'none'; frame-ancestors 'none'
x-robots-tag: none
cf-ray: a0d3dbbeac4747ec-BOM
What Should Happen?
It should seamlessly install Claude Code instead
Error Messages/Logs
Steps to Reproduce
Run:
curl -fsSL https://claude.ai/install.sh | bash
Claude Model
None
Is this a regression?
Yes, this worked in a previous version
Last Working Version
_No response_
Claude Code Version
N/A
Platform
Anthropic API
Operating System
Ubuntu/Debian Linux
Terminal/Shell
Non-interactive/CI environment
Additional Information
_No response_