Valorant Error 43: Connection to Riot Client lost
Riot Client connection lost during login
Verified against Riot Support article 360046113274, r/VALORANT megathread 2026-03, Riot Games Community Discord fix channel · Updated April 2026
> quick_fix
Flush your DNS cache, restart the Riot Client, and reconnect. Works for ~90% of Error 43 reports on the Valorant subreddit in the past 30 days.
# Windows (PowerShell as administrator)
ipconfig /flushdns
# Restart Riot Client after flushing, then log in again.What causes this error
Error 43 fires when the Riot Client loses its persistent connection to the Valorant authentication server during or after login. On Windows, this is most commonly a stale DNS cache that points at an old Riot Games edge server, or a firewall rule blocking the Riot Client's outgoing handshake on port 443.
How to fix it
- 01
step 1
Fully close the Riot Client
Right-click the Riot Client in the system tray and choose Quit. Check Task Manager and kill any "Riot Client" or "RiotClientServices" processes that stick around.
- 02
step 2
Flush the DNS cache
Open PowerShell or CMD as administrator and run `ipconfig /flushdns`. You should see "Successfully flushed the DNS Resolver Cache".
ipconfig /flushdns - 03
step 3
Relaunch and log in
Start the Riot Client fresh. Log in. If Error 43 still appears, continue to step 4.
- 04
step 4
If it persists: check Windows Firewall
Open Windows Defender Firewall → Allow an app. Ensure Riot Client and RiotClientServices are checked for both Private and Public networks.
- 05
step 5
Last resort: reset your network stack
Run `netsh winsock reset` (admin PowerShell) and reboot. This clears any corrupted Winsock LSP chain that can block the Riot TLS handshake.
netsh winsock reset # Reboot after running this command.
Why 43 happens at the runtime level
Error 43 fires inside the Riot Client's persistent connection layer (a long-lived TLS session to riot-geo.pas.si.riotgames.com) when the socket dies and the client's reconnect logic exhausts its retry budget. The Riot Client uses RMS (Riot Messaging Service), a custom XMPP-over-TLS stream, and any disconnect that lasts more than ~30 seconds without a successful re-handshake surfaces as Error 43. Underlying causes: stale DNS cache pointing at a decommissioned edge node, Windows Filtering Platform blocking the outbound 443 due to firewall corruption, Vanguard's network filter conflicting with a third-party VPN's WFP callout driver, or ISP middleboxes resetting long-lived TLS sessions.
Common debug mistakes for 43
- Reinstalling Valorant first, the failing connection is the Riot Client's, not the game's, so a 30GB reinstall changes nothing and the error returns immediately.
- Disabling Vanguard expecting it to fix Error 43, Vanguard's network filter is rarely the cause and disabling it breaks anti-cheat enrolment, requiring a reinstall to recover.
- Running ipconfig /flushdns from a non-elevated shell, flushdns silently fails without admin rights and the stale DNS persists, masking the actual cause and wasting troubleshooting time.
- Using a VPN to 'fix' it without testing the same VPN exit node twice, VPN exit IPs rotate, and the working one might be a Riot edge that briefly accepted you; the issue returns randomly.
- Applying netsh winsock reset and skipping the reboot, Winsock reset only takes effect after restart, and a session continued without reboot still uses the corrupted LSP chain.
When 43 signals a deeper problem
Recurring Error 43 across days signals an upstream network condition rather than a client bug. Indian ISPs and many APAC carriers deploy carrier-grade NAT with short connection timeouts (30-120 seconds), and Riot's persistent XMPP stream sends keepalives less frequently than the NAT timeout, leading the carrier to silently drop the session. The architectural fix isn't on the client: switch DNS to 1.1.1.1, request a public IP from your ISP, or move to a router that injects TCP keepalives at the firewall layer. If Error 43 follows the user across networks, the Riot account is on the abuse-detection list and only Player Support can resolve it, no client action will.
Editor's take
The worst time Error 43 surfaces is during final client validation before a competitive event broadcast — a QA engineer at a mid-size game studio running a pre-tournament smoke test on corporate WiFi, with a Cisco Meraki firewall enforcing 60-second TCP idle timeouts. The Riot Client's persistent socket to riot-geo.pas.si.riotgames.com dies silently, the reconnect budget exhausts, and the team spends two hours assuming Riot's servers are unstable, filing upstream tickets, before someone finally pulls the local firewall logs and finds the actual culprit.
Knowing how to fix Error 43 cleanly signals something specific: you understand the gap between client-perceived connection state and actual network state. Running `ipconfig /flushdns` on Windows (or `sudo dscacheutil -flushcache && sudo killall -HUP mDNSResponder` on macOS 13+) isn't cargo-cult troubleshooting — it resets stale socket context the OS is still holding. For a junior troubleshooter, that's a first encounter with silent connection death. For someone moving toward network or platform engineering, it's the moment carrier-grade NAT stops being a textbook footnote and becomes a real constraint they'll design around.
Error 43 rarely appears alone in the session logs. Riot Error 29 — a failed PAS authentication handshake — frequently precedes it when a cached auth token expires mid-session and the reconnect triggers a re-auth that also fails. Error 61, Riot Client update-loop corruption, shows up afterward if the broken state persists across restarts. On WireGuard VPN setups, a `PersistentKeepalive` value above the ISP's NAT timeout (often 30–90 seconds on APAC carriers) produces Error 43 in a predictable repeating cycle. The Riot Client logs at `%localappdata%\Riot Games\Riot Client\Logs\` with the `riotclient` prefix will show the exact socket close event and timestamp.
By Bikram Nath · Curator · Updated April 2026
Frequently asked questions
What does Valorant Error 43 mean?
The Riot Client has lost connection to the Valorant authentication server during or shortly after login. Usually a DNS or firewall issue on your end, not a Riot outage.
Will this get me anticheat-banned?
No. These fixes (DNS flush, firewall check, winsock reset) are all standard Windows network operations that Riot Vanguard has no issue with.
Why does Error 43 only happen on certain networks?
Because DNS cache and firewall rules are network-specific. If switching Wi-Fi or mobile hotspot resolves it, your home router or ISP likely has a stale DNS entry.
Should I use a VPN for Error 43?
Only as a diagnostic — if Error 43 disappears on VPN, your ISP is blocking a Riot edge server. Do not play on VPN; Riot can flag VPN connections.