Zyxel EX3501-T0 WiFi 6 DHCP Issue with Superonline (Turkey) - "failed to read /etc/ethers" Error

Tedaryum

Hello,

I am experiencing a persistent and critical issue with my Zyxel EX3501-T0 modem provided by Superonline (Turkey). The problem is that devices connected via WiFi 6 are frequently unable to receive an IP address via DHCP and are subsequently disconnected. I have already performed a factory reset, but the issue persists.

I have analyzed the modem's syslog and found the following recurring errors, which I believe are related to the problem:

• DHCP-related Error: daemon.err dnsmasq-dhcp: failed to read /etc/ethers: No such file or directory
  • dnsmasq-dhcp) cannot find or read a crucial system file (/etc/ethers) used for static IP assignments. This seems to be a core reason why IP assignment fails.
• Internet Connection Stability Issues: The logs also show frequent PPPoE connection terminations and re-establishments.
  • Sent PADT and Hangup (SIGHUP) followed by Connect: ppp1 <--> nas0_1 appear repeatedly, indicating the main internet connection is unstable.

I have performed the following troubleshooting steps without success:

• Rebooted the modem and the connected devices.
• Performed a factory reset on the modem.
• Checked for firmware updates via the modem's interface (none available).

The issue seems to be a firmware bug, as the factory reset did not fix the missing /etc/ethers file error. I suspect there might be a specific conflict with the WiFi 6 implementation or a more fundamental software issue affecting the DHCP service.

Has anyone else experienced this problem with the Zyxel EX3501-T0 modem? Are there any known firmware updates or workarounds for this specific issue? Any assistance or similar experiences would be greatly appreciated.

Thank you.

syslog (1).log

syslog.log

syslog(1).log

kursatufukcoskun

Hello,

Yes, I am experiencing the same issue. I am also using Superonline, and especially for the past week none of my devices have been able to obtain an IP address via DHCP. Although WiFi appears active, the devices constantly disconnect, and the problem only goes away if I assign a static IP manually. Any recommendations?

syslog.log

bahecz44120

try to change DHCP from 192.168.1.1 to 192.168.5.1 to see if the issue resolve. if not, check with your ISP about it.