Land cable. This really sucks. Really look forward to every evening and having my talented buds killing me and having a chat. Hope you have better luck than I have had Gomer.
Getting endless Lost Connection to Session errors everytime
- Thread starter repeat0ffender
- Start date
Land cable. This really sucks. Really look forward to every evening and having my talented buds killing me and having a chat. Hope you have better luck than I have had Gomer.
This really sucks bud.
The one thing I haven't seen is changing your DNS.
Id give 1.1.1.1 and then 8.8.8.8 a try and see if that routes the traffic/packets in a way that doesn't cause a hangup.
If that doesnt work you can do a node hop test from your IP to our bf4 server IP and see if or where there might be a problem. I had to do this in the past. Give me a few so I can look up the program I used to do the testing. For me in NY there are about 7 different node hops where one specific one was causing a packet issue.
At the time a new router fixed it for me. And then I moved to full fiber and never had an issue again. I feel your pain as I was going nuts for months about it.
BTW what is the difference between an American and a computer?
Americans have no trouble shooting!!!!
have you tried these yet? You probably did lol.
I saw someone post this somewhere on reddit lol,
Quote: If none of those things work for you, I spent a long ass time scrubbing steam forums for a solution and someone said if you load into a testing range and shoot down at least one target and leave, it should work when you load into a server. I tried it and this is the only thing that worked. I know this is years old but this is the Reddit post that comes up when you google it so hopefully it helps someone out there
Quote: If none of those things work for you, I spent a long ass time scrubbing steam forums for a solution and someone said if you load into a testing range and shoot down at least one target and leave, it should work when you load into a server. I tried it and this is the only thing that worked. I know this is years old but this is the Reddit post that comes up when you google it so hopefully it helps someone out there
Here's what chatgpt has to say about this.
That BF4 error is annoyingly common—and it’s usually network/ports/NAT, not the game itself. Let’s go straight to the stuff that actually fixes it.
UDP: 3659<br>UDP: 14000–14016<br>UDP: 22990–23006<br>
If your router supports UPnP, turn it ON instead (don’t do both at the same time).
Quick check:
That BF4 error is annoyingly common—and it’s usually network/ports/NAT, not the game itself. Let’s go straight to the stuff that actually fixes it.
What the error really means
BF4 uses UDP port 3659 for game traffic. If that port is blocked, misrouted, or already in use, the server drops you instantly.Step-by-step fixes (in order)
1. Restart the boring stuff (but it matters)
- Restart modem + router (unplug for 30 seconds)
- Restart your PC
This clears stuck UDP sessions. Surprisingly high success rate.
2. Make sure your firewall isn’t killing it
Windows Defender Firewall- Open Windows Defender Firewall
- Click Allow an app or feature
- Make sure Battlefield 4 and Origin/EA App are allowed on Private and Public
- If unsure → temporarily disable firewall and test
3. Port forward UDP 3659 (this fixes most cases)
Log into your router and forward these UDP ports to your PC’s local IP:UDP: 3659<br>UDP: 14000–14016<br>UDP: 22990–23006<br>
If your router supports UPnP, turn it ON instead (don’t do both at the same time).
4. Check NAT type (huge for BF4)
If your NAT is Strict or Symmetric, BF4 servers will kick you.Quick check:
- If you’re behind carrier-grade NAT (common with some ISPs), port forwarding won’t work at all
- Try connecting your PC directly to the modem (bypass router) as a test
5. Kill background apps that hijack UDP
Close or uninstall temporarily:- VPNs (very common cause)
- Hamachi
- NetLimiter
- Killer Network software
- Any “gaming booster” nonsense
6. Repair the game files
In EA App / Origin:- Library → Battlefield 4 → Repair
Corrupt network files can trigger instant disconnects.
7. IPv6 can break BF4 (yep, really)
Disable IPv6 on your PC:- Network Settings → Change adapter options
- Right-click active connection → Properties
- Uncheck Internet Protocol Version 6 (IPv6)
- Reboot
Quick reality check
If:- Other online games work
- BF4 kicks instantly
- Port forwarding doesn’t help
- Ask ISP for a public IPv4
- Use a router with proper UPnP
- Or (last resort) use a gaming-friendly VPN that supports UDP properly
Thanks for taking the time. Have done most of these but some I have not. Will try the others.
doing what we can to get you back in the battlefield!
If you have a second computer, try running bf4 on that one to see if the problem is on the connection side or the computer side.
Any time I had udp 3659 errors, it was when i was tethering off a cell phone. Changing to a different connection always fixed it.
Any time I had udp 3659 errors, it was when i was tethering off a cell phone. Changing to a different connection always fixed it.
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Try going by a friend with your pc to rule if it’s an internet connection problem or a pc
Another data point, tethering to my phone generates the same banned message that connecting to a VPN does at RC1.
I can still connect to some servers that do not have the same entry regulations as our BF4 servers.
Going to walk through post #67 items and see what happens.
edit: went through the items in post #67 and still have the same issue with our servers.
I can still connect to some servers that do not have the same entry regulations as our BF4 servers.
Going to walk through post #67 items and see what happens.
edit: went through the items in post #67 and still have the same issue with our servers.
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I am back, they call me gomer, I take seven kidz from golmud in line, cuz i am gomer
Had to hard reset my Starlink router. its been a higher ping but better Bandwidth than my previous dial up.. so I am happy and you can all sleep again
Had to hard reset my Starlink router. its been a higher ping but better Bandwidth than my previous dial up.. so I am happy and you can all sleep again
Breaking news. Nothing has changed.
Can play multiple rounds on some servers consistently and just as consistently I cannot join some servers like RC1/2/3, TBG and Turtles.
Can play multiple rounds on some servers consistently and just as consistently I cannot join some servers like RC1/2/3, TBG and Turtles.
Have you done these?
You run pbsvc.exe which is in your Battlefield 4 install folder. For me it's under C:\Program Files (x86)\Steam\steamapps\common\Battlefield 4\__Installer\punkbuster\redist
All of this.
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