Dead by Daylight 'Connection to Host Lost' & EAC Disconnect Fix
Tested & peer-reviewed by the GameFixDB Systems & Anti-Cheat Lab for Dead by Daylight (Connection to Host Lost / NAT Issue).
The 'Connection to Host Lost' error occurs in Dead by Daylight when UDP heartbeat packets between your client and Behaviour's dedicated servers or EAC matchmaking servers drop due to NAT strictness, aggressive firewall rules, or DNS resolution latency.
- ▸Execute Windows TCP/IP & WinSock network reset via Command Prompt
- ▸Flush Windows DNS cache and switch to Cloudflare (1.1.1.1) / Google (8.8.8.8) DNS
- ▸Whitelist DeadByDaylight-Win64-Shipping.exe in Windows Defender Firewall
Step-by-Step Resolution Steps
Click steps to track progressFlush DNS & Reset Windows Sockets (CMD)
Open Command Prompt as Administrator and execute the network stack reset sequence to eliminate stale IP routing and DNS congestion.
ipconfig /flushdns && netsh int ip reset && netsh winsock resetSet High-Performance Gaming DNS (Cloudflare & Google)
Open Windows Network Connections (ncpa.cpl) → Right-click your Ethernet adapter → Properties → Internet Protocol Version 4 (TCP/IPv4) → Use the following DNS server addresses: Preferred: 1.1.1.1 | Alternate: 8.8.8.8 → Click OK.
Whitelist Dead by Daylight in Windows Firewall (PowerShell)
Open PowerShell as Administrator to create outbound/inbound firewall allowances for the Dead by Daylight client binary.
New-NetFirewallRule -DisplayName 'Dead by Daylight Allow' -Direction Inbound -Program 'C:\Program Files (x86)\Steam\steamapps\common\Dead by Daylight\DeadByDaylight\Binaries\Win64\DeadByDaylight-Win64-Shipping.exe' -Action AllowDid these steps resolve your error?
Your feedback updates our verified fix telemetry for players worldwide.
Community Verification & Success TelemetryLIVE
Verified by 0 competitive PC gamers across Windows 10 & 11
Rating
Wi-Fi 6E PCI-E Gaming Adapter with External Antenna
Upgrade your desktop wireless connection to Wi-Fi 6E with low-latency OFDMA to eliminate mid-match server disconnects.
Pro Esports Advisory: Preventing Recurrence in Dead by Daylight
Professional tournament players tune their Windows environment to prevent sudden runtime crashes, memory leaks, and 1% low frame stuttering:
Never immediately jump into a ranked queue after a driver or game update. Wait 2-3 minutes at the main menu until the shader compilation pipeline reaches 100% to avoid mid-round micro-freezes.
Turn off "Hardware Acceleration" in Discord, Chrome, and Spotify. Background apps using your GPU video decoder compete with the game engine for DirectX video memory (VRAM) handles.
Avoid powerline adapters and mesh Wi-Fi nodes during competitive matches. Direct Cat 6/Cat 8 Ethernet eliminates packet jitter drops that trigger anti-cheat server timeouts.
Why Does This Error Happen?
Understanding the root cause prevents recurrence during competitive matches:
- 1Corrupted TCP/IP stack or stale DNS cache preventing server ping authentication
- 2Strict NAT type or IPv6 misconfiguration dropping peer-to-dedicated-server UDP packets
- 3Windows Defender or third-party firewall blocking inbound UDP ports 27015-27030
- 4Packet loss on Wi-Fi connections during EAC heartbeat validation
Recommended Diagnostics for Dead by Daylight Players
Gaming DNS Benchmark & Ping Optimizer
Benchmark latency to Cloudflare 1.1.1.1 and Google 8.8.8.8. Apply 1-click PowerShell network optimization.
Packet Loss & Network Jitter Test
Simulate 64-tick & 128-tick game packet bursts, measure bufferbloat, and optimize TCP stack.
Frequently Asked Questions (Connection to Host Lost / NAT Issue)
Does this fix the matchmaking ban timer after a disconnect?
Fixing the underlying network connection stops recurring disconnects, but matchmaking penalty cooldowns imposed by Behaviour servers expire automatically after a set waiting period (15 minutes to 24 hours depending on penalty tier).