Game became unplayable since new update, random disconnects when I instance in solo ops or in between rounds in pvp, I have perfect connection no jitter no packet loss and it's stable, the game still says it's moderate and it's been like that for years but ever since the new update it's genuinely unplayable, I reach the end of the solo ops and suddenly I can't kill enemies and I eventually get argulua error code, tried all their fixes, contacted ISP this cannot be a problem from my side
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Make sure your firewall rules are in place for D2 , steam and battleye. Also consider port forward your router. Is PnP enabled in your router/modem? If you have ATT fiber you can do a pass through on their modem to get you open NAT. The game will not play well on anything other than open NAT.
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Use either Ping Plotter or WinMTR to look at your Network . Set the program to ping a known good address that allows pings like google, or open dns etc, then leave the program run for around 15-30 , 30 for best results , but within 5 minutes you will see where the issue lies .