Post the results of "tracert" and "ipconfig /all".
Check the following User Manual link:
https://www.scribd.com/document/444627888/Manual-Modem-Valenet-Gpon-Ont-User-Manual
Does the manual match your fiber optic modem?
tracert google.com
Tracing route to google.com [172.217.166.110]
over a maximum of 30 hops:
1 1 ms 1 ms <1 ms 192.168.0.1
2 15 ms 14 ms 13 ms 10.120.11.2
3 32 ms 28 ms 25 ms 209.85.148.170
4 28 ms 26 ms 27 ms 74.125.242.129
5 27 ms 26 ms 26 ms 74.125.252.215
6 26 ms 25 ms 26 ms maa05s09-in-f14.1e100.net [172.217.166.110]
ipconfig /all
Windows IP Configuration
Host Name . . . . . . . . . . . . : BLESSON
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : domain.name
Ethernet adapter Ethernet 2:
Connection-specific DNS Suffix . : domain.name
Description . . . . . . . . . . . : Realtek PCIe GbE Family Controller
Physical Address. . . . . . . . . : 30-9C-23-EB-59-A7
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::858a:c113:70a7:130%11(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.0.4(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Thursday, May 28, 2020 7:40:03 AM
Lease Expires . . . . . . . . . . : Thursday, May 28, 2020 9:40:02 AM
Default Gateway . . . . . . . . . : fe80::56b8:aff:fe9e:2771%11
192.168.0.1
DHCP Server . . . . . . . . . . . : 192.168.0.1
DHCPv6 IAID . . . . . . . . . . . : 238066723
DHCPv6 Client DUID. . . . . . . . : 00-01-00-07-25-FB-4E-87-02-04-30-34-65-62
DNS Servers . . . . . . . . . . . : 8.8.8.8
8.8.4.4
NetBIOS over Tcpip. . . . . . . . : Enabled
When I connect the ONU directly without the router, ipconfig /all returns this :
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek PCIe GbE Family Controller
Physical Address. . . . . . . . . : 30-9C-23-EB-59-A7
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::858a:c113:70a7:130%11(Preferred)
Autoconfiguration IPv4 Address. . : 169.254.1.48(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . :
DHCPv6 IAID . . . . . . . . . . . : 238066723
DHCPv6 Client DUID. . . . . . . . : 00-01-00-07-25-FB-4E-87-02-04-30-34-65-62
DNS Servers . . . . . . . . . . . : 8.8.8.8
8.8.4.4
NetBIOS over Tcpip. . . . . . . . : Enabled
The tracert command returns an error as I can't access the internet when the ONU is connected directly.
In a way the manual matches, but my ONU, only have one ethernet port and no wifi, that's why its connected to a router. I tried the login address but still cannot access the ONU's settings.