Unable to access my router

[Mrblack761]

A few weeks ago i updated my Linksys WRT54GS with a dd-wrt firmware. Today I'm trying to change the settings in my router but it seems that it does not have a default gateway assigned to it. I've already tried doing the reset procedure "30/30/30" via the reset button. Any other suggestions or questions are welcomed and thank you in advanced for your help.

 

[Kursah]

The router's gateway would be your modem or ISP WAN. What is its address?

So by saying it has no default gateway, you shouldn't have Internet right now. Is that the case too?

Open command prompt and type IPCONFIG /ALL. Your gateway should be listed...its usually the first available host address on a network. Example... 192.168.0.1

If your IP Address is 192.168.100.137 odds are your router is 193.168.100.1. That would be your NICs gateway address and what you would type into your web browser to access your router.

You might already know this. But I wanted to cover that much so we can get an idea of where to go from here. Cheers!

 

[Mrblack761]

The router's gateway would be your modem or ISP WAN. What is its address?

So by saying it has no default gateway, you shouldn't have Internet right now. Is that the case too?

Open command prompt and type IPCONFIG /ALL. Your gateway should be listed...its usually the first available host address on a network. Example... 192.168.0.1

If your IP Address is 192.168.100.137 odds are your router is 193.168.100.1. That would be your NICs gateway address and what you would type into your web browser to access your router.

You might already know this. But I wanted to cover that much so we can get an idea of where to go from here. Cheers!

1. I already have a gateway configured in my house, so no, i'm not relying on this router for internet. However, I plan to make this into an access point in the very near future.

2.This is what I'm getting when i follow that step....

Autoconfiguration IPv4 Address. . : 169.254.205.6(Preferred
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . :

So with this i tried 169.254.205.1 with unlucky results :/

 

[Kursah]

That address is a default loopback in the range when it is not statically setup or picking up DHCP. That range works fine for peer-2-peer on a local-level, but is only used when no DHCP server is detected.

You need to point it to your DHCP server or give it a static IP address (recommended) in the IP address range that your DHCP server is managing (your other router/gateway for your site).

So what is handing out IP addresses on your network? A server? A router?

If you want to set this router up as an AP, you made sure DHCP was disabled then correct? I'm assuming it is, but then using DD-WRT (which I have a Hyper-V VM of atm, so I can boot it up and mess around to work through this with u)...you need to make sure your WAN is setup for DHCP as well, or give it a static IP address that's in your network's range.

There are other options yet, but let's get a connection going first.

Need more details about your site's network setup to really know how to help you correctly...all I can do is give blind suggestions based on assumptions. So list out what you have (kind of like you'd want to list out your PC system specs if you were experiencing a crashing/hardware issue and needed help).

 

[AsRock]

default should be 192.168.1.1 and default login root\password. when i did mine others i had to shutdown all comps and do another restart of the router.

 

[Mrblack761]

That address is a default loopback in the range when it is not statically setup or picking up DHCP. That range works fine for peer-2-peer on a local-level, but is only used when no DHCP server is detected.

You need to point it to your DHCP server or give it a static IP address (recommended) in the IP address range that your DHCP server is managing (your other router/gateway for your site).

So what is handing out IP addresses on your network? A server? A router?

If you want to set this router up as an AP, you made sure DHCP was disabled then correct? I'm assuming it is, but then using DD-WRT (which I have a Hyper-V VM of atm, so I can boot it up and mess around to work through this with u)...you need to make sure your WAN is setup for DHCP as well, or give it a static IP address that's in your network's range.

There are other options yet, but let's get a connection going first.

Need more details about your site's network setup to really know how to help you correctly...all I can do is give blind suggestions based on assumptions. So list out what you have (kind of like you'd want to list out your PC system specs if you were experiencing a crashing/hardware issue and needed help).

Ok, my main machine that my devices are connected to is a dual-band gateway from xfinity (Which is using DHCP). [I apologize if i didnt answer your question correctly.]

 

[Cybrnook2002]

If you need to configure it, I would recommend doing another 30/30/30 on the router, and then hard plugging it (LAN port 1) into a desktop or laptops LAN port that is NOT, I stress NOT already connected to your primary gateway (the comcast router) - you want a completely offline machine with no current assigned IP. If you don't your going to end up in this double NAT situation which I think is why your having your problems now.

If you can do that, you should be able to connect to the only available IP, which should be DD-WRT's 192.168.1.1 or 0.1 - Then log in and configure it correctly as an access point or whatever you want. Also a suggestion, assign it a static IP on your primary Gateways subnet, something like 192.168.1.100 or whatever you will remember. If you don't, DHCP from your comcast router will keep flopping IP's on you and you will have to track it down every-time you want to log into the linksys.

But basically I think you are trying to put a second DHCP server on your network, and thats your problem.

 

[Kursah]

Ok, my main machine that my devices are connected to is a dual-band gateway from xfinity (Which is using DHCP). [I apologize if i didnt answer your question correctly.]

You're fine man!

+1 to what Cybrnook said.

Connect the router to a computer without connecting it to the network (just connect the PC to the router to set it up for now). Configure it so the DHCP service is disabled and so it has a static IP address for the network it will be on (say it's on the 192.168.1.0 network, your Xfinity is .1 and this could be .2, set it to look at your Xfinity device as a gateway and you should be able to test it on the network and set it up as an AP if you so desire.

You should be set. Good luck and keep us posted!

 

[brandonwh64]

The router's gateway would be your modem or ISP WAN. W!

No it wouldnt... Your Default gate way is the address of the router and the range is usually 192.168.1.100-254.

Set yourself statically to 192.168.1.100 with a 255.255.255.0 subnet then try to ping 192.168.1.1

 

[R-T-B]

No it wouldnt... Your Default gate way is the address of the router and the range is usually 192.168.1.100-254.

Set yourself statically to 192.168.1.100 with a 255.255.255.0 subnet then try to ping 192.168.1.1

That would be your default gateway yes, not the routers.

 

[brandonwh64]

That would be your default gateway yes, not the routers.

Knowing the IP address of the default gateway on your home or business network is important information if you want to successfully troubleshoot a network problem.

In most cases, the default gateway IP address is the private IP address assigned to yourrouter. This is the IP address that your router uses to communicate with your local home network.

 

[95Viper]

If you want to find out what is on the Network... try this by SoftPerfect: SoftPerfect Network Scanner

It is hosted at amazon and the servers seem slow tonight. It is only around 2.7mb. It is a portable app; however, it will want to update the database it uses.
But, it will show you the devices (all) that are connected and their ip/mac addresses so you can check the mac address and compare it to yours and verify the info...

Just unzip it somewhere (like a temp directory) run the netscan.exe in the 64bit or 32bit folder.
Let it update the database.
Click on the scan button.
Should show you the IP address and mac address of the Linksys... if you have it connected.


Cybrnook2002 answer should be the easy/proper way in post #7


Try the address 192.168.1.x (where x=1 to 254) in your browser til you hit the one you want.
For example, my AP is assigned 192.168.1.3

 

[R-T-B]

the Router has a default gateway as well, but it's really irrelevant to this discussion, so I'll can it.

 

[Mrblack761]

Ok. After I made sure my computer was completely offline. I connected my router to said computer, and manually changing the config. Which at first seemed successful.


DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv4 Address. . . . . . . . . . . : 192.168.1.5(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.1.1
DNS Servers . . . . . . . . . . . : 192.168.1.1
NetBIOS over Tcpip. . . . . . . . : Enabled

But still I'm unlucky in my attempts to access the gui. Also when I started up Windows Network Diagnostics it told me that my assigned default gateway was not available.

 

[95Viper]

Did you try the SoftPerfect Network Scanner to see if it finds the router with everything connected?

Or, try to access using browser at:

192.168.1.X (replacing X with the Number 2 or 3 or 4)

 

[Cybrnook2002]

So you said, by resetting it and connecting from an unassigned computer, you gained access back to DD-WRT GUI. You configured it again, threw it on the network, and now you cant access it again?

Have you tried putty?
What version of DD-WRT are you running? DD-WRT can be all over the place with bugs etc....This could be a bug in your build. Also , how are you setting your AP in DD-WRT? I know DD-WRT has like 5 different options

Here is the DD-WRT guide for setting up "Access Point":
http://www.dd-wrt.com/wiki/index.php/Wireless_Access_Point

You should see if DD-WRT lets you do a DNS entry, and see if you can hit the AP from a short name, something like "AccessPoint"

 

[Mrblack761]

So you said, by resetting it and connecting from an unassigned computer, you gained access back to DD-WRT GUI. You configured it again, threw it on the network, and now you cant access it again?

Have you tried putty?
What version of DD-WRT are you running? DD-WRT can be all over the place with bugs etc....This could be a bug in your build. Also , how are you setting your AP in DD-WRT? I know DD-WRT has like 5 different options

Here is the DD-WRT guide for setting up "Access Point":
http://www.dd-wrt.com/wiki/index.php/Wireless_Access_Point

You should see if DD-WRT lets you do a DNS entry, and see if you can hit the AP from a short name, something like "AccessPoint"

No I did not have access to the DD-WRT GUI. Currently I'm running DD-WRT v24 mini generic bin.

 

[Mrblack761]

Did you try the SoftPerfect Network Scanner to see if it finds the router with everything connected?

Or, try to access using browser at:

192.168.1.X (replacing X with the Number 2 or 3 or 4)

So I've just tried SoftPerfect Network Scanner and it was only able to pick up my PC, nothing else . I've also tried to change the Default Gateway to a combination of different Class C addresses, still no luck.

 

[Mrblack761]

Coincidentally I'm taking a class at Cisco Academy for Routing and Switching. (On my way to get my CCNA). Tonight I'll take my router in to see what my professor has to say. Ill keep you guys posted.

 

[Kursah]

Good luck earning your CCNA! I am in CCNA 4 right now, getting ready for the final lab exam soon, I am not planning on taking the cert exam at this time though

. Would be nice to have more equipment at home to play with.

I would double check DHCP server configuration, and disable it at the primary setting if you haven't...but I'm sure you did. Verify the WAN port is set to accept DHCP (should be by default though) for testing purposes, obviously plan to set a static IP even if you leave WAN on DHCP.

I've ran DD-WRT from routers and VM's, and the only time I had this same issue is when I had not setup the device to NOT be a DHCP server on the network it was joining prior to connecting it to the network.

It seems that you're having addressing issues imho. I feel that the full picture of your network isn't painted here if its not working.

Really, as-long-as you get that WRT router to not try to be a DHCP server, and it is able to look at 192.168.1.1 as its gateway, the rest should be good to go. Were you able to verify this router's WAN port is working correctly in the first place? I have seen those fail on these routers.

Have you read through this: http://www.dd-wrt.com/wiki/index.php/Wireless_Access_Point

Again good luck on earning your CCNA! I hear it's a bear of an exam, but if you're getting into the networking field where Cisco is used, that's like the A+ for a baseline network professional. I'm trending towards MCSA and other certs for network administration as that's what is paying in my area.

 

[dorsetknob]

@Mrblack761
http://www.techpowerup.com/forums/members/mrblack761.154253/
PLEASE DO NOT MULTI POST

please edit your consecutive posts into one post

 

[Mrblack761]

@Mrblack761
PLEASE DO NOT MULTI POST

please edit your consecutive posts into one post

I sincerely apologize, I'm still a little new to techpowerup and forums in general. Next time I'll consolidate my replies into one post.

 

[Mrblack761]

After consulting with my professor we have came to the conclusion that this is an issue in the firmware and I should conduct a hard flash on the router. After that I found this website:

http://www.dd-wrt.com/wiki/index.php/Recover_from_a_Bad_Flash

It seems my power light is constantly flashing for the whole time that it is on; which seems to be listed out on said website, "If the power light blinks in a never ending way, the 30/30/30 reset has no effect. Go to the Windows section of this page to see the reset-from-scratch procedure."

So with that I'll begin the "Reset-from-scratch" Early tomorrow and I'll keep you guys posted...

 

[Jetster]

The WRT54GS you have to pre-flash if you want DD-WRT. It doesn't have enough memory if I remember correctly with the mini build. Make sure you have the correct version