1. D-Link DSL-G604T main information
1.1. Work in Progress
Porting OpenWRT to the D-Link DSL-604T is a work in progress. That's means, that you may compile and run only from Kamikaze SVN. Still there isn't support neither in White Russian nor Kamikaze releases, so installation procedure is not so hacking as on ZyXEL's, but more hard than uploading throught web-interface. All run's ok with 2.6.x kernel maybe except wireless, it need some tests.
1.2. Troubles
Since .21 kernel, to have Port Forwarding i.e. DNAT you need libipt_DNAT.so for MIPS and put it into /lib/ at router. It may be found here:
build_mipsel/linux-2.6-ar7/iptables-1.3.7/extensions/libipt_DNAT.so or build_mipsel/linux-2.6-ar7/iptables-1.3.7/ipkg-install/usr/lib/iptables/libipt_DNAT.so
Look https://dev.openwrt.org/ticket/1772 for more information.
Wireless is working with the acx-mac80211 driver, but as yet (r9450) this driver is incapable of AP mode.
If you need to use the wireless in AP mode then look at the acx driver, but beware because it does not support WPA (and probaly never will).
wlan0 IEEE 802.11b ESSID:"OpenWrt"
Mode:Managed Frequency:2.437 GHz Access Point: Not-Associated
Tx-Power=27 dBm
Retry min limit:7 RTS thr:off Fragment thr=2346 B
Encryption key:off
Link Quality:0 Signal level:0 Noise level:0
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
Ethernet is reported to be broken for kernel > 2.6.23. Release 10417 seems to be the last one without this problem. For details see https://dev.openwrt.org/ticket/3124
1.3. Specifications
Wireless 4-Port ADSL Router (ADSL 2/2+ Compliant).
CPU: Texas Instruments AR7 MIPS-based @ 150MHz.
Flash chip: 4Mbytes.
SDRAM: 16Mbytes.
Switch: IP175A.
Wireless NIC: TI ACX111.
Boot loader: ADAM2.
Here is a picture:
2. D-Link G604T flashing
So let's start. I'll describe the easiest OpenWRT installing method. You're have a D-Link DSL-G604T device.
First of all you what you need:
1) Linux machine or shell account;
2) Windows machine for flashing;
3) Simple hex editor like XVI, or shareware WinHex for example;
4) For Windows machines of course and PuTTY ssh-client.
2.1. Linux part
Compiling OpenWRT firmware
Check that you should have ~ 3Gb free space and you should install all dependencies. Best variant is a Gentoo-based machine, if your have Ubuntu, look at DSL-502T page.
Goto Linux console and type:
svn co https://svn.openwrt.org/openwrt/trunk
My revision was Kamikaze 10642 (bleeding edge, r10642). If your want to specify revision number type:
svn -r REVISIONNUMBER co https://svn.openwrt.org/openwrt/trunk
If you want to grab the extra packages type:
svn co https://svn.openwrt.org/openwrt/packages
Then go to trunk/package/ and type:
ln -s ../../packages/*/* .
This creates the symlinks for all the packages, now you are ready to configure.
Now go to trunk directory and type make menuconfig.
In configuration mode we need select those options:
Target System (TI AR7 [2.6]) Target Profile (Texas Instruments WiFi (default)) - usually set's by default. (Still at date 15/06/2007 it isn't work). Target Images ---> SquashFS Libraries ----> linux-atm Base system ---> br2684ctl(only for PPPoE) Network ---> ppp ---> ppp-mod-pppoa and/or ppp-mod-pppoe (depending on your ADSL type) Kernel modules ---> Network Devices ---> either annex A or B depending on the ADSL type (Annex of router is marked on PCB) Base system ---> busybox Configuration ---> Networking Utilities ---> [ ] httpd (Turn off) Base system ---> busybox Configuration ---> Networking Utilities ---> [ ] Enable IPv6 support (Turn off).
Optional:
Base system ---> busybox Configuration ---> Archival Utilities ---> unzip - Zip archivator. Base system ---> busybox Configuration ---> Networking Utilities ---> hostname - Show hostname.
Exit from configure menu and save settings.
Then input make and wait long time (it's depends on your machine's capabilities).
Adding checksum
Now we'll add a checksum to the firmware. Go to trunk/bin (or where you have firmware binaries) and type these commands:
wget ftp://ftp.dlink.co.uk/dsl_routers_modems/dsl-g604t/gpl_source_code/DSL-G604T.B01T16_GPL_release.tgz tar xvzf DSL-G604T.B01T16_GPL_release.tgz cd LINUX_GPL_SOURCE tar xvzf TI_chksum-0.1.orig.tar.gz cd TI-chksum-0.1 make mv tichksum ../.. cd ../.. rm -rf LINUX_GPL_SOURCE && rm DSL-G604T.B01T16_GPL_release.tgz ./tichksum openwrt-ar7-squashfs.bin
Calculating new memory mappings
Now, it's time to move your openwrt-ar7-2.6-squashfs.bin to Windows machine.
2.2. Windows part
(Will also work on linux with for example hexer and plain ftp!)
Now open this firmware file with a hex editor. And find the ascii string hsqs. Now looks at it's offset. For example mine was CA00F, but in your binary it'll be a different value. So we give it to right look 0x000CA00F.
Next, I'm not an arithmetic geek, and I don't understand how to work well with memory. If you're interested - look at the DSL-502T page, it's having a good calculation how-to on it. So, I made simple alghoritm for DSL-G604T, and you don't need worry, only carefully do what i wrote below. Now we need Windows Calculator or your great brain. Start the calculator, and set it to 4 byte hex mode.
Now how-to calculate:
mtd0, (Sum 0x90010000 + YOUROFFSET (You remember, in my case it was 0x000CA00F), and don't forget reject 0xNUMBEROFNULLS, i kept them for do not forget at final result),0x903f0000
mtd1,0x90010000, (Sum 0x90010000 + YOUROFFSET again)
mtd4,0x90010000,0x903f0000
That's all, and my final result looks like this (DON'T FORGET TO CALCULATE, DON'T BE SILLY AND JUST COPY&PASTE THIS):
mtd0,0x900DA00F,0x903f0000 mtd1,0x90010000,0x900DA00F mtd4,0x90010000,0x903f0000
FlashingFor the next bit you need to know the IP address of the ADAM2 bootloader. Have a look in OpenWrtDocs/TroubleshootingAR7 for more info. The address is assumed to be 192.168.1.1 for the next paragraph.
Now do Start -> Run -> cmd and goto the directory where openwrt-ar7-2.6-squashfs.bin is located, and type ftp 192.168.1.1 (192.168.1.199 for DSL-G664T), but DON'T PRESS ENTER KEY YET. Change the settings of your computers Wired connection to: IP: 192.168.1.5 Subnet: 255.255.255.0 Empty Gateway & DNS Turn off your modem and wait 10 seconds, then power on it, and look at the connection icon in the tray. As soon as it changes from disconnected to connected IMMEDIATELY press enter, maybe you will need some practice with it! If it doesn't work, see on OpenWrtDocs/TroubleshootingAR7 for more info
Now it's time to enter the results of your calculation, but in little other format. It should look like this (OF COURSE USE YOUR OWN VALUES, AND NEVER SET ANY OTHERS BUT mtd0, mtd1 and mtd4):
quote "SETENV mtd0,0x900DA00F,0x903f0000" quote "SETENV mtd1,0x90010000,0x900DA00F" quote "SETENV mtd4,0x90010000,0x903f0000"
That sets new memory mappings. Now you will finally flash the device: (Dont´t mistake FLSH for FLASH)
quote "MEDIA FLSH" binary debug hash put "openwrt-ar7-squashfs.bin" "openwrt-ar7-squashfs.bin mtd4" quote REBOOT quit
Now your router will reboot. Wait 1-2 minutes, then reboot the router. After about a minute, look when the Status led will light, then wait when it's light off, and you can set router's connection settings to DHCP. Remember that you can retrieve address at any new boot only after led light&off, so don't panic, if all ok you retrieve an address such as 192.168.1.XX.
My congratulations, you finally flashed it 
3. Configuring OpenWRT
Where is web-interface?
There isn't one There is the webif admin interface, but that isn't supported in Kamikaze yet.There isn't a better solution yet, so just use the console and your hands. Don´t worry, I'll help you, as you can see below.
Connecting to the shell
Go Start -> Run -> cmd and input telnet 192.168.1.1, you'll see OpenWRT logo and shell welcome, input passwd to set the root password, after this and one reboot telnet will not avaliable anymore. After this connect via SSH (with PuTTY) to 192.168.1.1 and you'll be in the system.
Setting up Internet
You need to convict of ADSL work. Simply input dmesg | grep DSL or try dmesg and look at end of print. If it's work, you'll see DSL in Sync phrase.
Type vi /etc/config/network and add this to the end:
PPPoA Configuration
config interface wan
option ifname ppp0
option unit 0
option proto pppoa
option encaps vc
option vpi 0
option vci 38
option username (your username here)
option password (your password here)
Where the vpi, vci are defined by your ISP.
PPPoE Configuration
config atm-bridge
option unit 0
option encaps llc
option vpi 8
option vci 35
config interface wan
option ifname nas0
option proto pppoe
option username (your username here)
option password (your password here)
The atm-bridge section configures br2684ctl, once again the vpi, vci are defined by the ISP.
To get WAN working on boot, type vi /etc/init.d/network, from the boot() section replace /sbin/wifi up with start.
Turning off the DHCP
DHCP have usually critics from different people, so i don't like it too. Turn off the DHCP is very simple procedure, just do rm /etc/config/dhcp. Then of course go to your computer's connection settings and manually set your IP-adress like 192.168.1.2, subnet 255.255.255.0, gateway 192.168.1.1 and reboot the router.
Changing hostname
Input vi /etc/config/system and change the option hostname OpenWRT to option hostname YOURHOSTNAME.
Setting time
To set current date and time you to set your timezone first. Look here for a table with timezones. http://wiki.openwrt.org/OpenWrtDocs/Configuration
The command is:
echo "YOURZONE" > /etc/TZ
For example:
echo "MSK-3MSD,M3.5.0/2,M10.5.0/3" > /etc/TZ
The D-Link DSL-G604T does´nt have a real-time clock onboard, and has to get the date and time at boot or use the default of 2000-01-01. So the only way is to use an NTP-client like rdate.
type:
rdate -s HOST
Instead of HOST you may use any public NTP host, for example pool.ntp.org.
Than add rule to crontab, doing crontab -e:
0 0 * * * /usr/sbin/rdate -s 128.138.140.44 >/dev/null 2>&1
You may use any other NTP-server instead of 128.138.140.44. That's will correct time every day at 00:00.
Turning off unused daemons
Goto /etc/init.d/, and create backup directory with name you wish, for example hlam, then move non-using scripts in here, for example i moved, br2684ctl, telnet, usb.
Configuring firewall
OpenWRT uses iptables firewall, so it's very simple, play with rules - it's simpler than the original D-Link DSL-G604T web-interface, and the firewall is way more stable. All that you need to do is vi /etc/firewall.user and look at commented examples. But for better understanding here are mine:
1) Closing all ports for internet except these, for those we'll create rules:
iptables -t nat -A prerouting_wan -p tcp -j DROP iptables -A input_wan -p tcp -j DROP
WARNING! IT ALWAYS MUST BE AFTER ALL OTHER RULES, I.E. EVERY TIME IT MUST BE AT THE END OF FILE.
2) SSH on port 22000 and open from outside. Let's start:
Goto vi /etc/config/dropbear and change line option Port '22' to option Port '22000' , then save and restart router. Then go vi /etc/firewall.user and add such lines:
iptables -t nat -A prerouting_wan -p tcp --dport 22000 -j ACCEPT iptables -A input_wan -p tcp --dport 22000 -j ACCEPT
3) Example Torrent and eMule rules:
# Torrent iptables -t nat -A prerouting_wan -p tcp --dport 32021 -j DNAT --to 192.168.1.2:32021 iptables -A forwarding_wan -p tcp --dport 32021 -d 192.168.1.2 -j ACCEPT # Mule iptables -t nat -A prerouting_wan -p tcp --dport 25572 -j DNAT --to 192.168.1.2:25572 iptables -A forwarding_wan -p tcp --dport 25572 -d 192.168.1.2 -j ACCEPT
Type /etc/init.d/firewall restart. That's all, now it should work.
Using ipkg
ipkg is one of the hearts of OpenWRT. It's a package installing/removing tool. Therefore there are small numbers of avaliable packages in Kamikaze SVN, it's useful. For example we'll remove dnsmasq and wireless-tools:
ipkg update ipkg remove dnsmasq ipkg remove wireless-tools
and install wi-fi driver:
ipkg install kmod-acx
Useful commands are ipkg update for updating the package lists, ipkg , ipkg remove <package> for removing, ipkg install <package> for installing, ipkg list to show avaliable packages list and ipkg list_installed to show installed packages.
Setting up dyndns
There are two tools: updatedd and inadyn. Both are in unofficial package repository. We'll use second, because it don't need scripting. So go http://www.ipkg.be and search for inadyn there, or get it directly using ipkg install http://www.forgotten-realm.net/openwrt/inadyn_1.86_mipsel.ipk. Then do rm /etc/init.d/S65inadyn. Then do vi /etc/inadyn.conf and write your values looking as in example.
Script to bring up ADSL if it's down, set time and start dyndns updating service
Thanks Z3r0 for skeleton and Vladimir Baboshin for advices:
Create new file vi /etc/adsl and input:
#!/bin/sh (-) MODEMSTATUS=$(head -n 1 /proc/avalanche/avsar_modem_training) ADSLSTATUS=$(ps | grep pppd) ADSLSTATUSLEN=$(expr "$ADSLSTATUS" : '.*') DATE=$(date '+%y') # Set yor VPI and VCI values if [ "$MODEMSTATUS" = "SHOWTIME" ]; then br2684ctl -b -c 0 -a VPI.VCI if [[ "$ADSLSTATUSLEN" -lt "48" ]]; then ifup wan; sleep 5; /bin/inadyn fi fi if [ "$DATE" = "00" ]; then # You may use any other NTP server rdate -s 128.138.140.44 fi
Make it executable:
chmod 755 /etc/adsl
Than execute crontab -e and add:
*/1 * * * * sh /etc/adsl >/dev/null 2>&1
That will check ADSL every minute.
4. Accessible GPIO pins
Position on board |
GPIO |
status LED |
8 |
wifi LED |
6 |
reset button |
11 |
jp7, middle [][x][] |
12 |
jp6, middle [][x][] |
13 |
testpoint near 15 (top) |
5 |
testpoint near 9 (top) |
10 |
5. Other
VLANs
Yes it is possible but so far it cannot be configured so it is locked with each port on a seperate VLAN all coupled with port4 (internal port). To achive this you need to pull pin 113 on the IP175A switch high during power on, luckily there is a VCC pin right next to it at 114.
Shorting pins is both ugly and dangerous you do so at your own risk!!!
Materials
List of installing procedure for other devices:
http://wiki.openwrt.org/CategoryAR7Device
Power guide of DSL-502T flashing:
http://wiki.openwrt.org/OpenWrtDocs/Hardware/D-Link/DSL-502T
For those who want to configure router with official firmware right:
http://www.seattlewireless.net/DlinkDslG604tConfiguration
Datasheet of the IP175A switch:
http://www.icplus.com.tw/Data/Datasheet/IP175A%20LF-DS-R08-20060220.pdf