Setting TTL Help

Thanks in advance for anyone taking the time to read.

I bought the ProtonNetworks 4G Modem PP14O and I am being throttled by Tmobile. I have tried to search how to avoid being throttled by the ISPs and it seems the only success comes from setting the TTL to 65. I am having trouble because there is no setting for TTL on the GUI. The modem it uses is the Quectel EC25, the GUI is a clone of the Asus N56U. There is a Console emulator on the GUI and I am able to send commands.

I have UNSUCCESSFULLY tried sending the following variations of the command:

iptables -t mangle -I POSTROUTING -o “ModemName” -j TTL --ttl-set 65

setting “ModemName” to:
usb0, usb1, usb2, usb3
ttyUSB0, ttyUSB1, ttyUSB2, ttyUSB3

reply is “iptables: No chain/target/match by that name.”

I really do not understand what I am doing, so I rely on forum posts as a guide. Please do provide detailed info if you can as it makes it easier to follow.

Ive also read that there can be a “AT” command to set TTL but I do not know how to get the console to accept AT commands. The ones I have tried are not accepted.

Am I on the right path here?

Hello BrutalRural, thanks for your question
Can you elaborate on what you said about being restricted by the ISP?
iptables -t mangle -I POSTROUTING -o “ModemName” -j TTL --ttl-set 65 This command modifies the internal firewall of the module. Please elaborate on what you are going to do? If you can, please elaborate on the list, thank you.

can you please show us how to change TTL to 65 or 64 for Quectel RM50X modules using AT commands ? Thank you

help can you show how to change TTL and SH and both change to TTL 65 And SH 64