I changed the firmware to tomato 1.28 - everything was buggy, I could not understand why, the doctor either hung up, then said that the ip address was set incorrectly or the server was not responding. After the flashing, access to ssh and a bunch of other settings was opened - the cause of the glitches was in 3881 an open connection to the router. The new firmware did not lag and the Internet itself did not reboot .
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