Why do I get 'This site can't be reached - The connection was reset' only on certain websites?

Site-specific connection resets typically indicate DNS resolution issues, firewall blocking, or server-side problems. The target server may be overloaded, misconfigured, or your ISP/firewall is blocking that specific domain. Try accessing the site from a different network or using a VPN to isolate the cause.

What's the difference between ERR_CONNECTION_RESET and 503/504 gateway errors?

ERR_CONNECTION_RESET occurs when an established connection is unexpectedly terminated, often due to network instability or client-side issues. 503 Service Unavailable indicates the server is temporarily unable to handle requests (overloaded or maintenance), while 504 Gateway Timeout means a proxy/gateway server didn't receive a response from upstream servers within the timeout period.

How can I tell if the connection reset is caused by my antivirus or firewall?

Temporarily disable your antivirus real-time protection and firewall, then test the problematic sites. If connections work normally, add Chrome and the affected domains to your security software's whitelist. Also check antivirus logs for blocked connections around the time of errors.

Why does the connection reset happen more frequently on mobile networks?

Mobile networks have higher latency, more aggressive power management, and carrier-level filtering that can cause connection instability. Mobile carriers also implement traffic shaping and may reset idle connections more aggressively. Try switching between WiFi and cellular data to confirm if it's network-specific.

Can browser extensions cause connection reset errors?

Yes, extensions that modify network requests (ad blockers, VPNs, security extensions) can interfere with connections and cause resets. Disable all extensions and test in incognito mode to isolate extension-related issues. Privacy-focused extensions are common culprits as they may block or modify requests in ways that break connections.

Chrome 'The Connection Was Reset' Error: Complete Troubleshooting Guide

Fix Chrome connection reset errors, 503/504 gateway timeouts, and 'This site can't be reached' issues with these proven troubleshooting steps.

Last updated: February 27, 2026

Last verified: February 27, 2026

1,711 words

Key Takeaways

Network configuration issues and DNS problems are the most common causes of Chrome connection reset errors
Server-side problems like overloaded backends or misconfigured load balancers trigger 503/504 gateway errors
Most connection reset issues can be resolved by clearing browser data, resetting network settings, or temporarily disabling security software

Fix Approaches Compared
Method	When to Use	Time	Risk
Clear Browser Data	First attempt for general connectivity issues	2-5 minutes	Low - may lose saved passwords
Reset Network Settings	DNS or network configuration problems	5-10 minutes	Medium - requires network reconfiguration
Disable Antivirus/Firewall	Security software blocking connections	1-3 minutes	High - temporarily reduces security
Chrome Safe Mode	Extension or profile corruption issues	2-5 minutes	Low - temporary diagnostic mode
Flush DNS Cache	Domain resolution problems	1-2 minutes	None - safe operation
Update Network Drivers	Hardware-level connectivity issues	10-20 minutes	Medium - driver compatibility risks

Understanding the Connection Reset Error

Chrome's "The connection was reset" error (ERR_CONNECTION_RESET) occurs when the browser successfully initiates a connection to a server, but the connection is unexpectedly terminated before data transfer completes. This differs from DNS errors or initial connection failures - the handshake succeeds, but communication breaks down.

The error manifests in several forms:

This site can't be reached - The connection was reset
ERR_CONNECTION_RESET
503 Service Unavailable
504 Gateway Timeout
502 Bad Gateway

Common Root Causes

Network Layer Issues:

Unstable internet connection dropping packets
Router or modem firmware bugs
ISP throttling or network congestion
MTU size mismatches causing packet fragmentation

DNS and Routing Problems:

Corrupted DNS cache entries
DNS server timeouts or misconfigurations
Routing table corruption
IPv4/IPv6 dual-stack issues

Browser-Specific Factors:

Corrupted Chrome profile or cache
Conflicting browser extensions
Outdated Chrome version with known bugs
Incorrect proxy or VPN settings

Security Software Interference:

Antivirus real-time scanning blocking connections
Firewall rules preventing specific traffic
Content filtering software interrupting requests

Server-Side Problems:

Backend server overload or crashes
Load balancer misconfigurations
SSL/TLS certificate issues
Application-level timeouts

Step 1: Initial Diagnosis

Start by determining if the issue is site-specific or affects all browsing:

Test Multiple Sites: Try accessing different websites (google.com, stackoverflow.com, github.com)
Cross-Browser Testing: Open the same URL in Firefox, Edge, or Safari
Network Connectivity Check: Ping external servers to verify basic connectivity
Device Comparison: Test on mobile device or different computer on same network

If only specific sites fail, the issue likely involves DNS, firewalls, or server-side problems. If all sites fail, focus on network configuration and browser settings.

Step 2: Browser-Level Troubleshooting

Clear Browsing Data: Navigate to chrome://settings/clearBrowserData and select:

Time range: All time
Browsing history ✓
Cookies and other site data ✓
Cached images and files ✓

Disable Extensions:

Open chrome://extensions/
Toggle off all extensions
Restart Chrome and test problematic sites
Re-enable extensions one by one to identify conflicts

Reset Chrome Settings: Go to chrome://settings/reset and click "Restore settings to original defaults". This preserves bookmarks but resets:

Default search engine
Homepage and startup tabs
Content settings
Cookies and site data
Extensions and themes

Create New Chrome Profile:

Close Chrome completely
Navigate to chrome://settings/people
Click "Add person" and create new profile
Test sites with fresh profile

Step 3: Network Configuration Fixes

Flush DNS Cache: Corrupted DNS entries often cause intermittent connection resets.

Windows:

ipconfig /flushdns
ipconfig /release
ipconfig /renew

macOS:

sudo dscacheutil -flushcache
sudo killall -HUP mDNSResponder

Linux:

sudo systemctl restart systemd-resolved
# or for older systems:
sudo service networking restart

Change DNS Servers: Replace ISP DNS with public alternatives:

Google DNS: 8.8.8.8, 8.8.4.4
Cloudflare DNS: 1.1.1.1, 1.0.0.1
OpenDNS: 208.67.222.222, 208.67.220.220

Reset TCP/IP Stack (Windows):

netsh int ip reset
netsh winsock reset
netsh advfirewall reset

Adjust MTU Size: Fragmentation issues can cause connection resets:

# Test optimal MTU size
ping -f -l 1472 google.com
# Set MTU (Windows)
netsh interface ipv4 set subinterface "Wi-Fi" mtu=1472 store=persistent

Step 4: Advanced Troubleshooting

Disable IPv6: IPv6 connectivity issues can cause fallback problems:

Windows:

Open Network Adapter Settings
Right-click network connection → Properties
Uncheck "Internet Protocol Version 6 (TCP/IPv6)"

Linux:

echo 'net.ipv6.conf.all.disable_ipv6 = 1' | sudo tee -a /etc/sysctl.conf
sudo sysctl -p

Proxy and VPN Troubleshooting:

Disable proxy: chrome://settings/ → Advanced → System → "Use a proxy server" (OFF)
Reset VPN connection or temporarily disable
Test direct connection without VPN

Firewall and Antivirus:

Temporarily disable Windows Defender Firewall
Add Chrome to antivirus exclusions
Disable real-time web scanning
Check for recent security software updates

Chrome Command Line Flags: Launch Chrome with diagnostic flags:

chrome.exe --disable-web-security --disable-features=VizServiceDisplayCompositor --disable-extensions --incognito

Step 5: System-Level Solutions

Update Network Drivers:

Open Device Manager (Windows) or System Information (macOS)
Locate Network Adapters
Update driver software from manufacturer website
Restart system after installation

Router Configuration:

Access router admin panel (usually 192.168.1.1)
Update firmware to latest version
Reset to factory defaults if issues persist
Configure QoS settings to prioritize web traffic

Windows Network Troubleshooter:

msdt.exe -id NetworkDiagnosticsWeb

Check System Resources: High CPU/memory usage can cause connection timeouts:

# Windows Task Manager CPU/Memory monitoring
# Linux resource monitoring
top
htop
iostat -x 1

Monitoring and Prevention

Chrome Net Internals: Access chrome://net-internals/ for detailed connection logs:

DNS tab: View resolution attempts
Sockets tab: Monitor active connections
Events tab: Real-time network activity

Network Performance Testing:

# Continuous ping monitoring
ping -t google.com
# Traceroute analysis
tracert google.com
# Speed test
speedtest-cli

Preventive Measures:

Keep Chrome updated to latest stable version
Regularly clear browser cache (weekly)
Monitor extension resource usage
Maintain router firmware updates
Use reliable DNS servers
Configure proper firewall rules for web traffic

Enterprise Environment Considerations

For corporate networks experiencing widespread connection reset issues:

Group Policy Settings:

Check Chrome Enterprise policies affecting network behavior
Review proxy authentication requirements
Verify SSL inspection configurations

Network Infrastructure:

Load balancer health checks
Firewall rule auditing
Bandwidth utilization monitoring
Certificate authority validation

Logging and Monitoring:

# Enable Chrome verbose logging
chrome.exe --enable-logging --log-level=0 --v=1

Log files location:

Windows: %LOCALAPPDATA%\Google\Chrome\User Data\chrome_debug.log
macOS: ~/Library/Application Support/Google/Chrome/chrome_debug.log
Linux: ~/.config/google-chrome/chrome_debug.log

Frequently Asked Questions

bash

#!/bin/bash
# Chrome Connection Reset Diagnostic Script
# Run this script to collect diagnostic information

echo "=== Chrome Connection Reset Diagnostics ==="
echo "Timestamp: $(date)"
echo

# Test basic connectivity
echo "Testing basic connectivity..."
ping -c 4 8.8.8.8 > /dev/null 2>&1
if [ $? -eq 0 ]; then
    echo "✓ Internet connectivity: OK"
else
    echo "✗ Internet connectivity: FAILED"
fi

# Test DNS resolution
echo "Testing DNS resolution..."
nslookup google.com > /dev/null 2>&1
if [ $? -eq 0 ]; then
    echo "✓ DNS resolution: OK"
else
    echo "✗ DNS resolution: FAILED"
fi

# Check current DNS servers
echo
echo "Current DNS configuration:"
if command -v systemd-resolve &> /dev/null; then
    systemd-resolve --status | grep "DNS Servers" | head -5
elif [ -f /etc/resolv.conf ]; then
    grep nameserver /etc/resolv.conf
fi

# Test specific problematic sites
echo
echo "Testing common problematic sites..."
sites=("github.com" "stackoverflow.com" "medium.com")
for site in "${sites[@]}"; do
    curl -I --connect-timeout 5 --max-time 10 "https://$site" > /dev/null 2>&1
    if [ $? -eq 0 ]; then
        echo "✓ $site: Accessible"
    else
        echo "✗ $site: Connection failed"
    fi
done

# Check Chrome processes
echo
echo "Chrome processes:"
ps aux | grep -i chrome | grep -v grep | wc -l | xargs echo "Active Chrome processes:"

# Network interface status
echo
echo "Network interface status:"
if command -v ip &> /dev/null; then
    ip link show | grep "state UP" | cut -d: -f2 | xargs echo "Active interfaces:"
elif command -v ifconfig &> /dev/null; then
    ifconfig | grep "flags=" | cut -d: -f1 | xargs echo "Available interfaces:"
fi

# Suggest next steps
echo
echo "=== Suggested Actions ==="
echo "1. Clear Chrome cache: chrome://settings/clearBrowserData"
echo "2. Disable extensions: chrome://extensions/"
echo "3. Try incognito mode: Ctrl+Shift+N"
echo "4. Flush DNS: sudo systemctl restart systemd-resolved"
echo "5. Reset network: sudo service networking restart"
echo
echo "For detailed network logs, run:"
echo "  chrome --enable-logging --log-level=0 --v=1"
echo "  tail -f ~/.config/google-chrome/chrome_debug.log"

Error Medic Editorial

Our team of senior DevOps engineers and SREs brings decades of experience troubleshooting complex web application issues. We specialize in browser compatibility, network diagnostics, and performance optimization across enterprise environments.

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