AdguardTeam
Bad connection if USB modem used
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AdGuard VPN CLI version
v1.5.10
Environment
- OS: Linux Mint 21.3 based on Ubuntu jammy 22.04, Linux Fedora 42
- Architecture: x86-64
The connection was successful, but up to 95% of packets were rejected when I used a USB modem. Everything worked fine when using a Wi-Fi connection. I tried two mobile operators and two operating systems: Linux Mint 21.3 and Linux Fedora 42. The VPN connection was poor with all mobile operators.
I think the problem is related to the TTL connection change. If I connect to a mobile operator without a VPN, the ping to 8.8.8.8 looks like this:
64 bytes from 8.8.8.8: icmp_seq=57 ttl=106 time=51.1 ms
If I connect to a VPN:
64 bytes from 8.8.8.8: icmp_seq=24 ttl=255 time=105 ms
--- Ping statistics for 8.8.8.8 ---
29 packets sent, 9 received, 68.9655% packet loss
I tried to change the TTL value in the tun0 interface using IPTABLES:
sudo iptables -t mangle -A POSTROUTING -o tun0 -j TTL --ttl-set 106 ,
but this command did not work.
Issue Details
Steps to reproduce:
- Connecting the USB modem to a compuser
- Starting VPN connection
- ping 8.8.8.8
Expected Behavior
Good internet surfing, good ping without the loss packets
Actual Behavior
Does not connect to any websites in the browser, poor ping with a large number of lost packets
Screenshots
Screenshot 1
Additional Information
No response
