D-Link DIR-868L User manual

Contents
1 Hardware
1.1 Specifications♦
•
2 Installation Instructions
2.1 Step-by-step instructions from out-of-the-box
factory firmware
♦
2.2 How to restore to factory firmware♦
•
3 Known Issues
3.1 Bad WiFi drivers♦ 3.2 OpenVPN♦ 3.3 D-Link DDNS♦
•
Hardware
Delivering Wi-Fi AC1750 dual band speeds with AC SmartBeam technology to your home network, the
DIR-868L is the perfect solution for those looking to enjoy online gaming, multiple HD video streams, and
fast file transfers ? all with less wireless interference for maximum throughput.
Specifications
CPU Broadcom
BCM4708X
RAM 256 MB
Flash 128 MB
Switch In
BCM4708X
Radio (2.4 GHz) BCM4331
Radio (5 GHz) BCM4360
Antenna Type External
(Dual Band)
Specifications found on Smallnetbuilder.net [1]•
D-Link_DIR-868L
Hardware 1

This Wiki page is for the Rev A model only! (for now)•
Installation Instructions
Step-by-step instructions from out-of-the-box factory
firmware
DD-WRT can be flashed directly on the D-Link DIR-868L by using the D-Link web interface:
Navigate to this page, select year, scroll down to the last link and select it, select dlink-dir868l-revc.
Now download the firmware file (dir868c-webflash.bin).
1.
Open the D-Link web-interface in your web browser (address: http://192.168.0.1), Log In, and go to
Tools -> Firmware *Warning: only flash over an Ethernet-cable
2.
Select factory-to-ddwrt.bin and click the "Upload"-button3. After flashing successfully, the router address should be changed into http://192.168.1.14. Upgrade the router (again) by using the dir-868-webflash.bin firmware5.
Note: The router doesn't support Hard Reset (aka 30/30/30 reset), use the Erasing NVRAM method
instead.
•
How to restore to factory firmware
Also works if you bricked your router.
Original post•
Download the stock firmware at
NA - DIR-868L_REVA_FIRMWARE_PATCH_1.10.FB.B04.ZIP♦ WW - DIR-868L_REVA_FIRMWARE_PATCH_1.10.B04_WW.ZIP♦
1.
Set your computers IP manually to 192.168.0.2 with a standard subnet of 255.255.255.0. (like this on
Windows).
2.
Unplug all cables (incl. power cable) from the router3. Insert a paper clip onto the hidden reset button located on the bottom of the device; you'll find it.4. Keep holding down the reset button as you plug in the power cable. Wait atleast 10 seconds until you
release the paper clip.
5.
Connect your computer to the first LAN port.6. Navigate to 192.168.0.1 and upload the firmware you downloaded earlier. The router will flash it and
reboot automatically.
7.
Now set your computer IP to automaticly detect, navigate to your gateway and login.8. Navigate to Tools - System and Restore Factory Settings.9.
D-Link_DIR-868L
Installation Instructions 2

Known Issues
Bad WiFi drivers
DD-WRT has multiple issues with WiFi firmware.
WiFi connect slow: you might experience slowness connecting your device to the AP. On Android it
always hangs at "Obtaining IP address" for ~10 seconds.
•
Link speed: the link speed on DD-WRT is not high as stock is. For example: DD-WRT has a link
speed for 5GHz of 200Mbit/s, on stock it is 433Mbit/s. Same goes for the 2.4GHz band.
•
5GHz band issue: the 5GHz band might not pop up when you search for WiFi networks on your
device, it will take ~10 seconds to show up to even be able to connect to it.
•
OpenVPN
If using the inbuilt OpenVPN-server in tunnel-mode, you may need to use the following firewall rules:
iptables -A INPUT -i vlan2 -m state --state NEW -p udp --dport 1194 -j ACCEPT
iptables -A INPUT -i tun2 -j ACCEPT
iptables -A FORWARD -i tun2 -j ACCEPT
iptables -A FORWARD -i tun2 -o vlan2 -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -A FORWARD -i vlan2 -o tun2 -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o vlan2 -j MASQUERADE
Note 1: Verify that the interfaces are correct by running the ifconfig command• Note 2: You may need to adjust the above IP-address (& netmask)•
The following Additional DNSMasq Options may also be needed, to stop DHCP(-service) on the tunnel-port:
interface=tun2
no-dhcp-interface=tun2
D-Link DDNS
D-Link offers router owners a free dynamic DNS host name service. This service works (surprisingly) without
any problems on the dd-wrt firmware:
DDNS Service DynDNS.org
Username Your username (no
email-address)
Password Your Password
Hostname <hostname>.dlinkddns.com
Type Dynamic
D-Link_DIR-868L
Known Issues 3

IP Check Yes *only when needed
A working state should give verification messages, like this one:
Thu Jan 22 23:11:21 2015: INADYN: Started 'INADYN Advanced version 1.96-ADV' - dynamic DNS updater.
Thu Jan 22 23:11:21 2015: INADYN: IP read from cache file is 'x.x.x.x'. No update required.
D-Link_DIR-868L
D-Link DDNS 4