How to fix fatal: unable to access: Proxy CONNECT aborted in Git

# Check Git-specific proxy settings
git config --global --get http.proxy
git config --global --get https.proxy

# Check system-wide settings
git config --system --get http.proxy
git config --system --get https.proxy

# Check repository-specific settings
git config --get http.proxy
git config --get https.proxy

# Check environment variables
echo $HTTP_PROXY
echo $HTTPS_PROXY
echo $http_proxy
echo $https_proxy
echo $NO_PROXY

http://[username:password@]proxyhost:port

# Without authentication
git config --global http.proxy http://proxy.company.com:8080

# With authentication (URL-encoded special characters)
git config --global http.proxy http://username:[email protected]:8080

# If password contains special characters, URL-encode them
# @ = %40, : = %3A, # = %23, ! = %21
git config --global http.proxy http://john.doe:p%[email protected]:8080

# Test if proxy port is open
nc -zv proxy.company.com 8080

# Test CONNECT method through proxy with curl
curl -v -x http://proxy.company.com:8080 https://github.com

# With authentication
curl -v -x http://username:[email protected]:8080 https://github.com

# Debug Git's HTTP communication
GIT_CURL_VERBOSE=1 git ls-remote https://github.com/git/git.git

# Set proxy with embedded credentials (less secure but simpler)
git config --global http.proxy http://username:[email protected]:8080
git config --global https.proxy http://username:[email protected]:8080

# Create or edit ~/.netrc (Linux/macOS) or %USERPROFILE%\_netrc (Windows)
machine proxy.company.com
    login username
    password your_password

git config --global http.proxy http://proxy.company.com:8080

# Use cntlm as a local proxy bridge
# Install cntlm, configure with domain credentials
# Then point Git to cntlm
git config --global http.proxy http://localhost:3128

# Remove Git proxy settings at all levels
git config --global --unset http.proxy
git config --global --unset https.proxy
git config --system --unset http.proxy
git config --system --unset https.proxy
git config --unset http.proxy
git config --unset https.proxy

# Clear environment variables (add to shell profile to persist)
unset HTTP_PROXY
unset HTTPS_PROXY
unset http_proxy
unset https_proxy

# On Windows PowerShell
$env:HTTP_PROXY = ""
$env:HTTPS_PROXY = ""

git config --global http.proxy http://proxy.company.com:8080
git config --global https.proxy http://proxy.company.com:8080

# Bypass proxy for specific domains
git config --global http.https://github.com.proxy ""
git config --global http.https://gitlab.com.proxy ""

# Or use NO_PROXY environment variable
export NO_PROXY="github.com,gitlab.com,bitbucket.org,*.internal.company.com"

# Set proxy only for specific domains
git config --global http.https://internal-git.company.com.proxy http://proxy.company.com:8080

# Temporarily disable SSL verification (NOT recommended for production)
git config --global http.sslVerify false

# Better: Add corporate CA certificate
git config --global http.sslCAInfo /path/to/corporate-ca-bundle.crt

# Or append to system certificate store
# On Ubuntu/Debian:
sudo cp corporate-ca.crt /usr/local/share/ca-certificates/
sudo update-ca-certificates

# On RHEL/CentOS:
sudo cp corporate-ca.crt /etc/pki/ca-trust/source/anchors/
sudo update-ca-trust

# Check current remote URL
git remote -v

# Change from HTTPS to SSH
git remote set-url origin [email protected]:username/repository.git

# Test SSH connection
ssh -T [email protected]

# Edit ~/.ssh/config
Host github.com
    Hostname ssh.github.com
    Port 443
    User git

# Enable Git HTTP trace
GIT_TRACE=1 GIT_CURL_VERBOSE=1 git clone https://github.com/user/repo.git

# More detailed curl debugging
GIT_TRACE_CURL=1 git fetch

# On Windows
set GIT_TRACE=1
set GIT_CURL_VERBOSE=1
git clone https://github.com/user/repo.git

# Collect all proxy settings
git config --list | grep -i proxy
env | grep -i proxy

# Get error details
GIT_CURL_VERBOSE=1 git clone https://github.com/example/repo.git 2>&1 | head -50