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Routers

Default Frtiz!Box IP-address setting: 192.168.178.1
Frtiz!Box 4020
Fritz!Box 5490
Linksys WRT54 routers alternative firmware
Mikrotik HEX lite
Ubiquiti EdgeRouter X
Zyxel T50. When WiFi has difficulty to connect, clear the list in: Network Settings > Home Networking > Static DHCP > Modify column (delete the entry's (of unknown devices))

Security

NetUSB bug: If your router has a USB connection port, you really do need to make absolutely certain that it's not listening on its WAN interface port 20005.

IP settings

WAN: Set the WAN side to accept an IP number from a DHCP server
LAN: Set the LAN side to a fixed IP number and turn the DHCP server on unless there is already a DHCP server in the LAN side network

NAT

An expanation including UPnP, ALG and STUN

Port knocking

kockd can facilitate portnocking. This kind of port knocking can be unsafe in case a replay attack can be performed
fwknop is a client server solution

Dangers

Attack could let remote hackers target devices on the internal networks

Resetting

30-30-30 reset procedure

Logging in with default values

For all reset procedures the router is powered by an power adapter (not via PoE)

EMPTY: There is no default for this field

RouterUserpasswordIPReset to defaults methodRemark
Dlink DIR-850Lnone or Admin or adminLeave empty192.168.0.1Power the device on. Wait 10 seconds. Press the reset button on the bottom for at least 10 seconds but not much longer because then the router will go into recovery modeEnter the new username and password after the reset
Edimax BR-6104Kadmin1234192.168.2.1Power the device on. Wait 10 seconds. Press the reset button on the back for at least 6 seconds
Frtiz!Box 4020Not neededOn the bottom of the router192.168.178.1 Alternative 169.254.1.1Goto the login page of the webinterface. Click on “Forgot your password?”. Follow the instructions
Linksys BEFSR41Leave emptyadmin192.168.1.1Power the device on. Wait 10 seconds. Press the reset button on the back for at least 30 seconds
Linksys WRT54GLeave emptyadmin192.168.1.1Power the device on. Wait 10 seconds. Press the reset button on the back for at least 30 secondsVersions: 2.0, 2.2, 3.0; CPU: 200MHz; Flash: 4MB; RAM: 16MB; Power 12V 1.0A; Latest openWRT version: 10.03.1
Linksys WRT54GLLeave emptyadmin192.168.1.1Power the device on. Wait 10 seconds. Press the reset button on the back for at least 30 secondsVersions: 1.0, 1.1; CPU: 200MHz; Flash: 4MB; RAM: 16MB; Power 12V 1.0A; Latest openWRT firmware version: 10.03.1; Latest Cisco Linksys firmware version: 4.30.17 build 11, Jun. 23, 2015
Mikrotik hEXEMPTYEMPTY192.168.88.1Press the reset button. Apply the power. There are 3 options. Release the button when 1. A green LED starts flashing to reset RouterOS configuration to defaults. 2. The LED turns solid green to clear all configuration and bridge all interfaces. 3.The LED is no longer lit (~20 seconds) to cause a device to look for Netinstall servers(required for reinstalling RouterOS over the network). Regardless of the above option used, the system will load the backup RouterBOOT loader if the button is pressed before power is applied to the device. Useful for RouterBOOT debugging and recovery. Source: hEX Quick Guide on the Mikrotik website
Netgear WGR614adminpassword192.168.1.1Power the device on. Wait 10 seconds. Press and hold the reset button (on the backside next to the left side of the antenna ) until the power light blinks on after about 10 seconds. Release the reset button and wait until the router is rebooted
Sitecom WL-173adminadmin192.168.0.1Power the device on. Wait 10 seconds. Press the reset button on the back for at least 6 seconds
Sweex WL050 = TP-link TL-WR542Gsweexmysweex192.168.50.1Power the device off. Press the reset button on the back and keep it pressed. Turn the power on. Wait for at least 10 secondsWhich hardware version to the TP-Link TL-WR542G is this? Updates from TP-Link can be found here On sweex.com the router can not be found
Tomato v1.28 on Linksys WRT54G / GLrootadmin192.168.1.1Power the device on. Wait 10 seconds. Press the reset button on the back for at least 30 seconds
TP-link TL-WR542Gadminadmin192.168.1.1Power the device off. Press the reset button and hold it. Turn on the power. Wait about 3 seconds until the SYS LED lights up. Release the reset button. Wait for the router to rebootUpdates can be found here
TP-link TL-WR741NDadminadmin192.168.1.1Power the device off. Press the reset button and hold it. Turn on the power. Wait about 3 seconds until the SYS LED lights up. Release the reset button. Wait for the router to rebootUpdates can be found here
Ubiquti Edge router Xubntubnt192.168.1.1There are two methods: 1. Runtime reset (recommended). When bootup is complete. Press and hold the Reset button for about 10 seconds until the eth4 LED starts flashing and then becomes solidly lit. After a few seconds, the LED will turn off, and the EdgeRouter will automatically reboot. 2. Power-on reset. Disconnect power from the EdgeRouter. Press and hold the Resetbutton while connecting power to the EdgeRouter. The port LEDs will light up in sequential order. Keep holding the Resetbutton until the LED on the last port starts flashing, and then release the button. eth0 has the static IP address 192.168.1.1. eth1 has a DHCP server. Source: Edgerouter X Quick Start Guide on the Ubiquti website

Changing the IP address of the router

Connect an IP cable from the PC to one of the switchports of the router Login in the router Change the IP adress of the router Bring the network connection down and up again

This can be done via Networkmanager (left click )
or do as root: ifdown eth0; ifup eth0

Now you can access the routers controlinterface again via the new IP address of the router

401 Bad Request

If you get

401 Bad Request
Cann't use wireless interface to access web.

It can be that you are trying to log in via WiFi while the

Wireless Access Web:

This is how it is called in a Linksys WRT54G router, is disabled

Cascading routers

When two routers or a modem/router and a router are cascaded and the second router is a WRT54G it has to be set to Gateway. We did not get it to work with the Router setting. WRT54G settings select

Setup | Advanced Routing | Advanced Routing | Operating mode | Gateway

SMA antenna connectors

RP-SMA (Reverse Polarity)


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routers.txt · Last modified: 04-07-2022 18:29 by wim