What Is Rainbow Six Siege Error Code 6-0x00001000?
Error code 6-0x00001000 is a matchmaking timeout error in Rainbow Six Siege. It means your game client could not connect — or lost connection — to Ubisoft's matchmaking servers. The root cause is almost always a network issue: a server outage, an unstable internet connection, a corrupted DNS cache, or background apps throttling your bandwidth.
Quick Diagnostic Overview
Use this table to quickly identify the most likely cause before diving into the step-by-step fixes below.
| Error Code | Error Type | Common Cause | Estimated Fix Time | Difficulty |
|---|---|---|---|---|
6-0x00001000 |
Server / Connectivity | Ubisoft server outage | Wait only | Easy |
6-0x00001000 |
Server / Connectivity | Weak or unstable internet | 1–3 min | Easy |
6-0x00001000 |
Server / Connectivity | Corrupted DNS cache | 2–5 min | Moderate |
6-0x00001000 |
Server / Connectivity | Wrong or slow DNS server | 3–5 min | Moderate |
6-0x00001000 |
Server / Connectivity | Background apps stealing bandwidth | 1–2 min | Easy |
6-0x00001000 |
Server / Connectivity | Corrupted game files | 10–20 min | Moderate |
How to Fix Error Code 6-0x00001000 in Rainbow Six Siege
Pro Tip: Work through these fixes in order. Fix #1 takes 30 seconds and resolves the problem for the majority of players. Only proceed to later fixes if the error persists.
Check Rainbow Six Siege Server Status
Fastest FixIf Ubisoft's servers are down for maintenance or experiencing an outage, no amount of local troubleshooting will help. Always check server status first before spending time on other fixes.
- 1.Visit the Ubisoft Help page at
https://www.ubisoft.com/en-us/help - 2.Click Server Status and search for Rainbow Six Siege.
- 3.Also check the @Rainbow6Game Twitter/X account for any maintenance announcements.
- 4.If servers are down — wait for the outage to be resolved. This is the only fix in that scenario.
Restart the Game and Ubisoft Connect
A simple restart clears temporary glitches and session data that can cause the matchmaking handshake to fail.
- 1.Press
Ctrl + Shift + Escto open Task Manager. - 2.End all Rainbow Six Siege and Ubisoft Connect processes.
- 3.Wait 30 seconds, then relaunch Ubisoft Connect as Administrator.
- 4.Launch Rainbow Six Siege and try matchmaking again.
Reboot Your Router and Modem
An unstable internet connection is one of the top causes of error 6-0x00001000. A power-cycle forces your router to renegotiate a fresh connection to your ISP and clears any internal routing cache.
- 1.Power off your modem and router by unplugging the power cables.
- 2.Wait a full 60 seconds.
- 3.Plug the modem back in first, wait 30 seconds, then the router.
- 4.Run a speed test at
fast.comto confirm connectivity is stable. - 5.Prefer a wired Ethernet connection over Wi-Fi for lower latency and packet loss.
Flush Your DNS Cache (Windows)
High Success RateA stale or corrupted DNS cache can prevent your PC from resolving Ubisoft's server addresses correctly. Flushing it is quick and risk-free.
- 1.Press
Windows + Sand search Command Prompt. - 2.Right-click and select Run as Administrator.
- 3.Enter each command below, pressing Enter after each:
ipconfig /flushdns
ipconfig /registerdns
ipconfig /release
ipconfig /renew
netsh winsock reset
After the last command, restart your PC for the Winsock reset to take full effect.
Change DNS to Google (8.8.8.8) or Cloudflare (1.1.1.1)
Your ISP's default DNS servers can be slow or unreliable. Switching to a fast public DNS can reduce connection timeouts significantly.
- 1.Press
Windows + R, typencpa.cpl, press Enter. - 2.Right-click your active network adapter → Properties.
- 3.Select Internet Protocol Version 4 (TCP/IPv4) → Properties.
- 4.Choose Use the following DNS server addresses and enter:
| Provider | Preferred DNS | Alternate DNS | Speed |
|---|---|---|---|
8.8.8.8 |
8.8.4.4 |
⚡ Very Fast | |
| Cloudflare | 1.1.1.1 |
1.0.0.1 |
⚡ Fastest |
Click OK and restart your PC after applying the settings.
Close Background Applications
Bandwidth-heavy apps running in the background — torrent clients, video streams, other games, cloud sync tools — can starve Rainbow Six Siege of the stable connection it needs for matchmaking.
- 1.Press
Ctrl + Shift + Escto open Task Manager. - 2.Switch to the Processes tab and sort by Network usage.
- 3.End any non-essential processes with high network activity (e.g., BitTorrent, Dropbox, OneDrive sync).
- 4.Relaunch Rainbow Six Siege and test matchmaking.
Verify and Repair Game Files (Last Resort)
Last ResortIn rare cases, corrupted game files can interfere with the client's ability to communicate with Ubisoft servers. Ubisoft Connect has a built-in file repair tool.
- 1.Open Ubisoft Connect.
- 2.Find Rainbow Six Siege in your library.
- 3.Click the ▼ arrow beside Play.
- 4.Select Verify Files.
- 5.Wait for scan and repair to complete.
- 1.Open Steam → Library.
- 2.Right-click Rainbow Six Siege.
- 3.Select Properties → Local Files.
- 4.Click Verify Integrity of Game Files.
- 5.Restart after the process finishes.
A known Xbox-specific bug affects certain profiles. Navigate to Xbox Home → Social → Sign In or Out, sign out, and sign back into a different profile or the same profile fresh. Some profiles experience matchmaking restrictions that a sign-out cycle resolves.
How to Verify the Fix Worked
After applying any fix above, follow this quick checklist to confirm error 6-0x00001000 is resolved before jumping back into ranked play.
Verification Checklist
| Check server status |
40%
|
| Restart game & client |
55%
|
| Reboot router/modem |
65%
|
| Flush DNS cache |
75%
|
| Change DNS server |
80%
|
| Verify game files |
90%
|
Still Seeing Error Code 6-0x00001000?
If all seven fixes have failed, the issue may be on Ubisoft's end or tied to a regional ISP routing problem. At that point, your best options are:
- →Contact Ubisoft Support at
support.ubisoft.comwith your error log. - →Check the Rainbow Six Siege subreddit (
r/Rainbow6) for reports of widespread issues. - →Try using a VPN temporarily to rule out ISP-level routing blocks to Ubisoft's matchmaking endpoints.