Topic 'RT-N56u blocking domain... no idea why.' in forum 'Networking' - dslreports.com

Re: RT-N56u blocking domain... no idea why.

Sun, 09 Feb 2014 10:34:10 EDT

ropeguru posted : NM

Re: RT-N56u blocking domain... no idea why.

Fri, 07 Feb 2014 23:47:58 EDT

Datagg posted : Kontos, you were Right..... Our host blocked our IP do to what they said "It looks like you were blocked due to too many failed sftp attempts.".... So why, this is the big question. All along i thought it was the router because each time i bypassed it for hard wired it loaded up. Now im more confused than ever, as im not sure what would cause that on my end. Great call though K0ntos, you were dead on with your thoughts. Thanks
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Re: RT-N56u blocking domain... no idea why.

Fri, 07 Feb 2014 21:19:18 EDT

Datagg posted : Doing a tracer thru my router tool is showing the last successful hop is at my domains host (hostasaurus), then it fails after that point...

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Re: RT-N56u blocking domain... no idea why.

Fri, 07 Feb 2014 21:15:14 EDT

Datagg posted : Kontos, i just wrote my hosting server to your question... Point im at now is when i plug in direct it all works, yet this just not practical as all my other systems are down, etc... so im at a point where i will need to get a new router, yet im not sure that will help based on all else working internet wise thru the router... its just this one domain.. dammit i thought this was done for while, didn't expect this to happen so soon..
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Re: RT-N56u blocking domain... no idea why.

Fri, 07 Feb 2014 20:59:33 EDT

kontos posted :

said by Datagg:

Thanks.. but what is so dang odd, that was the only site that didn't work.. and if indeed it was a IP issue, why when I hard wired the domain would work, yet in router it wouldn't..

With DHCP, the assigned IP address is usually reserved based on the MAC address of the connecting device. That would have changed when you switched from using the router to a direct connection to the ISP. When you switched back, the router's reserved IP address was assigned to it again.

You may be able to test this if the WAN configuration part of your router interface has a way to change or clone the MAC address of the WAN port on the router.

Also, if it does turn out to be based on IP address, I'd look into the possibility that the hosting server has some sort of automatic DOS protection that blocks by IP after too many requests or something.

Re: RT-N56u blocking domain... no idea why.

Fri, 07 Feb 2014 20:54:38 EDT

Datagg posted : My god its not loading again.... All day no issues and just 20 minutes ago it stopped... Do you guys think this would happen with a new router, or is this something else. I have no extra router to test with here unfortunately.

Re: RT-N56u blocking domain... no idea why.

Fri, 07 Feb 2014 14:10:55 EDT

Datagg posted : Thanks.. but what is so dang odd, that was the only site that didn't work.. and if indeed it was a IP issue, why when I hard wired the domain would work, yet in router it wouldn't... absolutely baffling. i hate issues when they just resolve themselves with no idea as to why, while all I can do is just wait for the day it decides to come back. What makes this so bad for me is this is a site I maintain company wise. the router I have has no DHCP release, well manually that is. i can set frequency, yet cant release/renew on the spot.

"Do you still have anything that might show the original router WAN IP to compare with to the currentone?"

--Regrettably no, i reset the router so many times those logs are gone.

Re: RT-N56u blocking domain... no idea why.

Fri, 07 Feb 2014 14:08:14 EDT

ropeguru posted : Better supports my theory. If the IP on the router changed with this renew, then it could very well have been a routing issue with the old IP.

Do you still have anything that might show the original router WAN IP to compare with to the currentone?

Re: RT-N56u blocking domain... no idea why.

Fri, 07 Feb 2014 14:01:59 EDT

Datagg posted : Also did tracert with router back online using the cmd prompt in windows

over a maximum of 30 hops:

Trace complete.

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Re: RT-N56u blocking domain... no idea why.

Fri, 07 Feb 2014 13:52:33 EDT

Datagg posted : Hi. Ok, using the routers utility

Trace complete.
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Re: RT-N56u blocking domain... no idea why.

Fri, 07 Feb 2014 13:11:57 EDT

ropeguru posted : Just for the heck of it, can you post a traceroute of with and without the router.

I find it interesting that it is taking 30 hops with the router but the other day it was only 8 without it. Sounds like to me you really are getting put into a different subnet with and without router and the routes are changing big time.

Re: RT-N56u blocking domain... no idea why.

Fri, 07 Feb 2014 10:23:52 EDT

Datagg posted : Guys, sorry I just noticed something interesting, whether or not this effected its issue is unknown, yet taking a look in routers admin it shows the lease for my dhcp was renewed. Grabbing a line from the router system log stating "Feb 7 08:14:33 stop_wan(): perform DHCP release"... would this have anything to do with it?

Re: RT-N56u blocking domain... no idea why.

Fri, 07 Feb 2014 10:05:22 EDT

Datagg posted : You guys going to think im crazy, but its working again... All the way till retiring last night it never worked, get up this morning and the domain loads up. What in the heck is going on??? traceroute within router now shows successful with 30 hops. Ping shows successful with 5 packets transmitted and 5 received, 0% packet loss. I don't get it.

Thank you guys so much yet again for all your help...Hopefully this wont happen again, yet based on past this will be revisited again. Have a great weekend guys!!!!
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Re: RT-N56u blocking domain... no idea why.

Fri, 07 Feb 2014 09:36:49 EDT

ropeguru posted : Ok, some more details needed.

When tracert fails with router, what is the last successful hop?

If after the router, what IP does the router have on its WAN side. What IP do you get when you bypass the router and connect directly to the modem? This could be a provider routing issue if you are getting IP's in two different subnets.

Re: RT-N56u blocking domain... no idea why.

Fri, 07 Feb 2014 09:33:21 EDT

ropeguru posted : NM

Re: RT-N56u blocking domain... no idea why.

Fri, 07 Feb 2014 09:29:58 EDT

LittleBill posted : is the domain hosted locally?is it running on a server in your network or is it a random domain on the internet?

Re: RT-N56u blocking domain... no idea why.

Fri, 07 Feb 2014 01:14:59 EDT

Datagg posted : anyone else have any ideas.... Thanks

Re: RT-N56u blocking domain... no idea why.

Thu, 06 Feb 2014 19:44:22 EDT

Datagg posted : Traceroute the same IP from when I did it from cmd prompt, and within router. As far as the DNS, I tried to change that using open DNS earlier as well with Google when i selected "connect to dns server automatically", then selected no and added different DNS. Ultimately all internet worked, minus that one domain. Made sure it matched within PC adapter settings also.

Re: RT-N56u blocking domain... no idea why.

Thu, 06 Feb 2014 19:33:30 EDT

shdesigns posted : Check what DNS the router is using. It could be your ISP is providing two DNS servers and only one works. PC may only use one server while the router may alternate.

Make sure with and without the router, you are tracerouting to the same IP.

Re: RT-N56u blocking domain... no idea why.

Thu, 06 Feb 2014 19:14:19 EDT

Datagg posted : NSlookup with router address found
NSlookup without router, address found

Traceroute to domain with router failed.
Traceroute to domain without router completed with 8 hops

Final test was done with Ethernet hard wired and domain works. Once I plug back into router it will fail.

I have tried downgrading router firmware with no difference. Reboot after each one. Put current back, no difference. I also tried traceroute with my routers tool it has in admin and failed. Doing a ping with tools, showed the domains ip with 5 packets transmitted, 0 received 100% packet loss. Domain did load up hardwired, yet now back in router fails. all other connections work.
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Re: RT-N56u blocking domain... no idea why.

Thu, 06 Feb 2014 19:01:02 EDT

tomdlgns posted : take a look at the last post HELLFIRE made, reply back with some answers, please.

Re: RT-N56u blocking domain... no idea why.

Thu, 06 Feb 2014 12:10:08 EDT

Datagg posted : and that time is back again.... out of the blue, this began this morning. What I have done thus far, rebooted router, reinstalled firmware, flushed dns, unplugged router for about 15 minutes (thought perhaps heat). Doing a ping of this website (while through router) request times out, doing it hard wired by passing router, ping successful. Again, this site works while bypassing router, yet on wireless side (and through router) the site wont load yet all others do. All computers, even my cell phone on wireless end will not load that one site. Switching cell phone to not use wireless it loads right up... This issue is so odd, as its been what now, over a month since last post and all has been fine, then all of the sudden this morning it does this again. Perhaps i should just by a new router and be done with it. Again my router is a RT-N56U and of course a couple months past warranty.

EDIT... i tried to change DNS servers also, no change.. Getting positive ip address doing a nslookup also. Anyone have any ideas, this just makes no sense. Just about ready to take a hammer to this router... yet its only 1 site that wont load, which i need to have.. so damn!!!
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Re: RT-N56u blocking domain... no idea why.

Fri, 03 Jan 2014 03:08:47 EDT

HELLFIRE posted : Didn't respond to any of the things I'd asked in your other thread, OP but oh well...

said by Datagg:

Pinging site through router yields "request timed out", yet pinging with modem hardwired to computer is a

success. Also tried pinging other sites with normal hookup and a reply from each was a success. Only the one domain yields no

results through router while all else gets a positive ping.

Did you also do an NSLOOKUP of said URL -- again with and without the N56U?

Bad pings could mean anything, but doing the ping test AND the NSLOOKUP tests validate that a) your computers
can resolve the domain, and b) can communicate with it.

One other suggestion I forgot to mention was to do a traceroute to the URL with and without the N56U, but if
this is working again... alittle hard to pin down now.

Anyways, I'd file the troubleshooting steps away for the next time this happens.

Regards

Re: RT-N56u blocking domain... no idea why.

Thu, 02 Jan 2014 17:27:18 EDT

Datagg posted : Unbelievable.... Just a few minutes ago my wife yells out, what you do its working... As much as i would love to take credit, this is the worse kind of fix EVER, when you didn't do anything. Wow, im grateful its now working, yet why just like that?... Being me looking for answers or possible ones, I notice router is a bit cooler as no one has been able to use it... also opened window a bit ago with nice breeze rolling in. i have had many routers take a dump from heat, yet that was a complete failure, not like this was. Hope it lasts, but ill be waiting for the drop again.

Thanks Tom for all the suggestions.. Guess for now ill chalk it up to a possession in the house. Have a great new year!!!
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Re: RT-N56u blocking domain... no idea why.

Thu, 02 Jan 2014 17:08:45 EDT

tomdlgns posted : ok, i just wanted to confirm it was being factory reset.

Re: RT-N56u blocking domain... no idea why.

Thu, 02 Jan 2014 17:02:02 EDT

Datagg posted : Yes, reset to factory pressing rest button 10 seconds.. had to re enter all my wirelss, network info which allowed all to work once again MINUS that 1 domain....

definitely put passwords back to what i had.. im crazy on security as we all should be in this day and age...

Re: RT-N56u blocking domain... no idea why.

Thu, 02 Jan 2014 16:57:34 EDT

tomdlgns posted : when you said that you reset the wire, are you referring to power cycling it, only?

when i say reset, i am talking about defaulting it back to factory settings. it seems that some setting or something in the router was changed to block access to that single domain. if you reset it back to factory settings any user change that was made, assuming one was made, would no longer be there.

you will know if you have successfully defaulted back to factory if your wireless SSID disappears (the factory SSID will be in its place).

this is step one and i would do this before i wasted time and money with a new router.

did you leave the admin password of the router with system defaults? if so, anyone connected to your network could have logged in (w/o you knowing) and made a change.

step 1, when buying a router and setting it up is connecting to it with an ethernet cable and changing the default administrator password. once you have done that, then you should log back in and make the rest of your changes (wifi, etc...)

if you factory reset it 6 times, that means you would have re-configured it 6 times by now, is that the case?

confirm that you are actually factory defaulting your router. i have upgraded firmware and it has kept the existing settings, meaning, updating the firmware might have the setting that is screwing you up, enabled.

with all that being said, if you proceed with this make sure you have a backup of your router settings. i would create a backup and save it to the desktop. i would also write down any really important setting you might need (although, because of your cable connection, i don't think anything for that will be needed).

if you attempt to default back to factory, remember that if you follow the directions and the wireless SSID is still the same as what you have it set to now, that means it didnt default to factory settings. i have had some back luck with some routers while trying to default them, most of them have different instructions. just hitting the reset button might not be enough. sometimes you have to press and hold the reset, while unplugging the power, etc.., which is why i always confirm that the SSID changed back to default.

good luck.

Re: RT-N56u blocking domain... no idea why.

Thu, 02 Jan 2014 16:41:45 EDT

Datagg posted : Thanks tom. Cable here... i have 2 desktops, wired from router..and 2 on the wireless side including other devices. I have reset router probably 6 or more times thus far with no results. Even re flashed firmware to see if that helped. Wireless side wont work for that domain, yet neither will my 2 desktops wired directly from router... definitely the router blocking it, why i have no clue. It would be a much easier pill to swallow if the things stopped working altogether, yet just 1 domain, that has me baffled to no end. As for my neighbor, that was just me confirming the site loaded for others and it was just my end here. Have you seen this before Tom, where a great working router just decided to prevent 1 domain from loading while all else works great... i sure haven't, but i guess there is no other explanation at this point. Im trying to dig up warranty info as this was just bought last February..What a pain though as I am more than likely just going to have to buy a new one as this site i can't go without getting on. I could just hardwired to mine (as that worked testing), but then the other systems in the house that need wireless access wouldn't work... Cant have wires all over the place either... what a crazy situation this router is doing... Thanks Tom and all else who have tried to help.
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Re: RT-N56u blocking domain... no idea why.

Thu, 02 Jan 2014 16:26:12 EDT

tomdlgns posted : does your office consist of a bunch of random computers or is there a domain server at the office that computers connect to (active directory).

it sounds like it is the router based on everything you said.

cable/dsl or other? what type of connection do you have.

how hard would it be to reset the router back to default in terms of making all the proper changes (wifi, any rules you might have had, etc...)? i would recommend writing down and important settings, reset the router to default and before you make any changes, try the site and see if it works.

what do you mean by your neighbor...same hub? i assume that means you both get internet from the same "hub" and each of you have your own modems.

FTP isnt working because the FTP IP address and your site IP are the same. if the site didnt work but FTP did that would just mean that port 80 is being blocked but that port 21 was open, however, it sounds like the entire ip/domain is blocked for you, anyway.

Re: RT-N56u blocking domain... no idea why.

Thu, 02 Jan 2014 15:06:54 EDT

Datagg posted : Hi Tom. No modifications in router. This is actually my business and all day yesterday we were logged into the domain adding products... Later in the day, we couldn't access it. I thought at first it was my host, yet they replied back its working and loading. For us nothing though, yet all else worked wireless side and wired. Thought it was perhaps cox blocking for some reason, so I hooked from modem to my comp and it worked, so there went that thought. Took my cell phone out, which is hooked up to wireless and it wouldn't load either, so turned wireless off then tried data and it loaded... My next door neighbor, same hub, it loaded for them also, called my bro across town, cox also, it loaded... So i can say without a shadow of a doubt its the router. Lost as to what to do, I downgraded firmware, nothing.... went back to current, nothing. Whats the kicker in all of this is everything works great except for this 1 domain. heck even my FTP access to it wont load either. its like the RT-N56U decided to block that site and nothing else..Makes no sense. Issue for me now is im out of warranty on this router and since its my business I need to get back on so it looks like im going to have to buy a new router. What ticks me off is everything works, its not like the wireless is down and all else fails... just that one domain. This is just crazy.

Pinging site through router yields "request timed out", yet pinging with modem hardwired to computer is a success. Also tried pinging other sites with normal hookup and a reply from each was a success. Only the one domain yields no results through router while all else gets a positive ping.
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Re: RT-N56u blocking domain... no idea why.

Thu, 02 Jan 2014 13:45:26 EDT

tomdlgns posted : DNS issue? have you modified anything in the router?

i assume you are hosting your site externally (not on your network).

can you ping the IP/domain and get a reply?

RT-N56u blocking domain... no idea why.

Thu, 02 Jan 2014 12:57:24 EDT

Datagg posted : My apologies, I posted this in another section and not sure if it was right...

Hello. I am having an issue that for the life of me cant figure out why its happening. Ill try to explain best I can. I have a domain/website that all of the sudden yesterday began not to load. This on my 2 desktops and laptop. FF and IE used. All other sites, emails etc work. My setup is 2 computers via wireless and 2 from router back to computers. Did the normal things to trouble shoot, unplugged router, modem, etc... Still that 1 site would not load up, yet all others things on wireless side would work minus this one domain.

Then I bypassed the router, ran directly to my computer and the domain worked, so now I know its not my ISP blocking anything. I finally reset the router figuring that would have to fix it, and it did not. I just cant figure this out. This is the first time i have ever seen this happen. Everything works on wireless side and wired side for all things minus 1 domain.

How can this be fixed... Its driving me nuts. This is one of my business websites so its vital I get in there. Anyone have any suggestions.

Thank you and happy new year
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