Multiple disconnection problem. Unable to access locally. #581
Description
Description of the problem
Multiple disconnection problems.
I cannot connect locally to my NAS with my domain name, but only with my private address 192.168.1.xxx:yyyy
Description of your products
Synology DS 920+
Linux DS920 4.4.302+ #72806 SMP Mon Jul 21 23:14:27 CST 2025 x86_64 GNU/Linux synology_geminilake_920+
DSM 7.2.2-72806 Update 4
ethernet dongle UGREEN CM648 USB-C RJ45
Description of your environment
Adapter connected from switch 2.5G to a 2.5Gb port on a Synology RT6600ax router
cable category Cat.7
Output of dmesg command
Output of lsusb command
|__usb1 1d6b:0002:0404 09 2.00 480MBit/s 0mA 1IF (Linux 4.4.302+ xhci-hcd xHCI Host Controller 0000:00:15.0) hub
|__1-2 05e3:0608:8538 09 2.00 480MBit/s 100mA 1IF ( ffffffd6ffffffa3ffffffebffffffcb) hub
|__1-2.1 0463:ffff:0100 00 1.10 12MBit/s 20mA 1IF (EATON Eaton 3S Blank)
|__1-2.4 0403:6015:1000 00 2.00 12MBit/s 90mA 1IF (dresden elektronik ConBee III DE03217673)
|__1-4 f400:f400:0100 00 2.00 480MBit/s 200mA 1IF (Synology DiskStation 7F00047D2A13F280)
|__usb2 1d6b:0003:0404 09 3.00 5000MBit/s 0mA 1IF (Linux 4.4.302+ xhci-hcd xHCI Host Controller 0000:00:15.0) hub
|__2-1 0bda:8156:3104 00 3.20 5000MBit/s 256mA 1IF (Realtek USB 10/100/1G/2.5G LAN 4013000001)
Output of ifconfig -a command
docker0 Link encap:Ethernet HWaddr 02:42:19:59:79:56
inet addr:172.17.0.1 Bcast:172.17.255.255 Mask:255.255.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:189245 errors:0 dropped:0 overruns:0 frame:0
TX packets:199245 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:150381627 (143.4 MiB) TX bytes:112827942 (107.6 MiB)
docker657 Link encap:Ethernet HWaddr F2:A9:06:A5:72:7F
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:137958 errors:0 dropped:0 overruns:0 frame:0
TX packets:126429 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:61270678 (58.4 MiB) TX bytes:51483931 (49.0 MiB)
eth0 Link encap:Ethernet HWaddr 00:11:32:CA:AD:63
inet addr:192.168.1.50 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1017841344 errors:0 dropped:0 overruns:0 frame:0
TX packets:622645485 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:595925665584 (554.9 GiB) TX bytes:34229712944 (31.8 GiB)
Interrupt:97 base 0xc000
eth1 Link encap:Ethernet HWaddr 00:11:32:CA:AD:64
inet addr:192.168.1.200 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:96 base 0xe000
eth2 Link encap:Ethernet HWaddr 6C:1F:F7:15:BD:58
inet addr:192.168.1.100 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:152529986 errors:0 dropped:0 overruns:0 frame:0
TX packets:5850565 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:87588681018 (81.5 GiB) TX bytes:8112764234 (7.5 GiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:22297329 errors:0 dropped:0 overruns:0 frame:0
TX packets:22297329 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:11040157911 (10.2 GiB) TX bytes:11040157911 (10.2 GiB)
sit0 Link encap:IPv6-in-IPv4
NOARP MTU:1480 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
tun1000 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:169.254.135.116 P-t-P:169.254.135.116 Mask:255.255.248.0
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1400 Metric:1
RX packets:11493 errors:0 dropped:0 overruns:0 frame:0
TX packets:18624 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:500
RX bytes:1437543 (1.3 MiB) TX bytes:18207691 (17.3 MiB)