both wired and wireless connection often drop?

Do you mean you have already updated the firmware to the latest one but the issue still exists?

If it's only the wireless disconnection issue, try to change the wireless channel.

If the wired connection also drops, confirm the connection provided by your ISP is well. you can check the DSL LED when you lose connection.

The LED gets off when you lost connection, you should contact your isp to check your connection.