Any hope to flash this device?
If it's not in the supported device list then it's a small chance.
Now you have to provide more info about this device like cpu/soc ram flash and serial boot log.
I managed to gain ssh access
Log in web interface and open java console, then trow thos commands
var x = $.xmo;
x.init();
x.login("internal", "");
$.xmo.setValuesTree("ACCESS_ENABLE_ALL","Device/UserAccounts/Users/User[@uid='3']/RemoteAccesses/RemoteAccess[@uid='1']/LANRestriction");
======Version Info======
######kernel version######
Linux version 4.1.52-5.02L.07 (rmm-svce-urd2int04@compil-atr-1) (gcc version 5.5.0 (crosstool-NG crosstool-ng-1.23.0-317-g85b86d8) ) #1 SMP PREEMPT Mon Feb 13 14:41:41 CET 2023
======System Info======
######/proc/uptime######
2251.90 8859.37
######/proc/cpuinfo######
processor : 0
cpu model : ARM
BogoMIPS : 100.00
Features : fp asimd evtstrm aes pmull sha1 sha2 crc32
CPU implementer : 0x42
CPU architecture: 8
CPU variant : 0x0
CPU part : 0x100
CPU revision : 0
processor : 1
cpu model : ARM
BogoMIPS : 100.00
Features : fp asimd evtstrm aes pmull sha1 sha2 crc32
CPU implementer : 0x42
CPU architecture: 8
CPU variant : 0x0
CPU part : 0x100
CPU revision : 0
processor : 2
cpu model : ARM
BogoMIPS : 100.00
Features : fp asimd evtstrm aes pmull sha1 sha2 crc32
CPU implementer : 0x42
CPU architecture: 8
CPU variant : 0x0
CPU part : 0x100
CPU revision : 0
processor : 3
cpu model : ARM
BogoMIPS : 100.00
Features : fp asimd evtstrm aes pmull sha1 sha2 crc32
CPU implementer : 0x42
CPU architecture: 8
CPU variant : 0x0
CPU part : 0x100
CPU revision : 0
######/proc/brcm/kernel_config######
CONFIG_SMP=1
CONFIG_PREEMPT=1
CONFIG_DEBUG_SPINLOCK=0
CONFIG_DEBUG_MUTEXES=0