sort of OT: Linksys router blocking certain sites

Sun Aug 2 09:58:11 MST 2009

I had an old Linksys wired router that was acting the same way.  I was able
to access all sites I tried, but one (the web site was was actively working
on)  I could access from a direct connect to the modem, but not from the
router.  I had Cox reset my modem, I even had them reprovision me and assign
a new IP but nothing worked (hmmm now that I think about it, the reprovision
MAY have worked for a couple times, don;t remember).  On the router side I
reflashed the firmware, and moved the ports I was using.  I even reloaded my
network drivers on the PC.  I eventually got a new router and all was well
again.  the funny thing was I could access the other domain on hte same host
(used bluehost.com with several domains attached)

I do not remember if I could connect using the IP, may not have even tried.

On Sat, Aug 1, 2009 at 11:27 PM, Bryan O'Neal <boneal at cornerstonehome.com>wrote:

> I am sure this is a stupid question, but have you flashed your router? Or
> tried accessing on a different port? You may have a nat lock, though I have
> never heard of one lasting through a power cycle on a Linksys, I would not
> put it past it. Flashing (Or even doing a full factory reset) should clear
> that.
>
>
> On Sat, Aug 1, 2009 at 8:39 PM, Jason Hayes <jason at jasonhayes.org> wrote:
>
>> On Saturday 01 August 2009 04:45:02 pm Lisa Kachold wrote:
>> > On 8/1/09, Jason Hayes <jason at jasonhayes.org> wrote:
>> > > Not sure why this is happening.
>> > >
>> > > My Linksys WRT54GS router just suddenly (yesterday a.m.) started
>> blocking
>> > > a group of sites that I administer. I was working on one of the sites
>> and
>> > > it started getting slower and slower, then finally cut out.
>> >
>> > Are you possibly locked out at that hosting provider?  Ask that they
>> > "escalate your ticket" to the highest level you can to rule out system
>> > firewall lockouts?
>>
>> Can't be that because if I bypass the router and plug my main computer
>> directly into the Cox modem, I can access the sites without any problems.
>> When
>> I do that I can view the site and sign in as admin, add content, etc.
>>
>> > How are you accessing these sites?  Port 22?  VNC?  http/https through
>> > auth processes?
>>
>> Nothing terribly complex -- Just http. These are simple drupal websites
>> that I
>> have set up for clients. I was working on a new theme for one of the
>> websites
>> (www.bonnydann.com), when the router started acting up.
>>
>> Also noticed that when I'm running through the Linksys router, I can log
>> in to
>> the ftp portion of the site for file uploads, etc. without any problems.
>> I'm
>> also getting email from the accounts on that hosting package. So I know it
>> is
>> just the web portion (http) that is acting up.
>>
>> > > I know the sites are working because if I plug straight into the
>> modem, I
>> > > can
>> > > access them. (Also family in Canada can access them without any
>> issues.)
>> > > Also,
>> > > the rest of the Internet is still out there - I can access pretty much
>> > > any other site.
>> >
>> > So, you possibly can't get a new cox IP address but you can request
>> > they verify you did not get into one of their traps?
>> >
>> > Let's look further:
>> >
>> > 1) Can you traceroute from the command line to the server?  If not
>> > where does it fail?
>>
>> From the router Administration --> Diagnostics page on the WRT54GS, I can
>> ping
>> to the site, no packets lost
>>
>> PING bonnydann.com ( 66.116.193.208 ) : 56 data bytes
>> 64 bytes from 66.116.193.208: icmp_seq=0, ttl=52 times=70. ms
>> 64 bytes from 66.116.193.208: icmp_seq=1, ttl=52 times=70. ms
>> 64 bytes from 66.116.193.208: icmp_seq=2, ttl=52 times=70. ms
>> 64 bytes from 66.116.193.208: icmp_seq=3, ttl=52 times=70. ms
>> 64 bytes from 66.116.193.208: icmp_seq=4, ttl=52 times=80. ms
>> --- bonnydann.com ping statistics ---
>> packets transmitted = 5 , packets received = 5 packet loss = 0%
>> round-trip min/avg/max = 70/72/80
>>
>> Can also traceroute to the site
>>
>> traceroute to bonnydann.com (66.116.193.208) ,30 hops max,40 byte packet
>> 1 10.35.128.1 (10.35.128.1) 10. 0 ms <10.0 ms <10.0 ms
>> 2 68.2.1.253 (68.2.1.253) <10.0 ms <10.0 ms <10.0 ms
>> 3 70.169.73.45 (70.169.73.45) 10. 0 ms 10. 0 ms <10.0 ms
>> 4 68.1.0.165 (68.1.0.165) 10. 0 ms 10. 0 ms 10. 0 ms
>> 5 4.69.133.34 (4.69.133.34) 10. 0 ms 10. 0 ms 10. 0 ms
>> 6 4.69.133.38 (4.69.133.38) 20. 0 ms 30. 0 ms 20. 0 ms
>> 7 4.69.144.138 (4.69.144.138) 20. 0 ms * 20. 0 ms
>> 8 63.146.27.33 (63.146.27.33) 20. 0 ms 20. 0 ms 30. 0 ms
>> 9 * * * Request timed out.
>> 10 63.144.63.214 (63.144.63.214) 70. 0 ms 80. 0 ms 70. 0 ms
>> 11 * * * Request timed out.
>> 12 66.116.193.208 (66.116.193.208) 70. 0 ms 80. 0 ms 70. 0 ms
>> Traceroute Complete.
>>
>> > 2) If you limit icmp, can you netcat trace to that port?
>> > http://www.jfranken.de/homepages/johannes/vortraege/netcat.en.html
>>
>> Looking at his "querying webservers" section and using
>>
>> printf 'GET / HTTP/1.0\n\n'  | nc -w 10 www.bonnydann.com 80
>>
>> I get
>>
>> www.bonnydann.com [66.116.193.208] 80 (www) : Connection timed out
>>
>> When I unplug the WRT54GS and plug straight into the modem, I get
>>
>> HTTP/1.1 503
>> Date: Sun, 02 Aug 2009 03:15:40 GMT
>> Server: Apache
>> Cache-Control: store, no-cache, must-revalidate, post-check=0, pre-check=0
>> Expires: Sun, 19 Nov 1978 05:00:00 GMT
>> X-Powered-By: PHP/4.4.9
>> Set-Cookie:
>> SESSd41d8cd98f00b204e9800998ecf8427e=bfe600d5c18c137cd565b33c1be80cd0;
>> expires=Tuesday, 25-Aug-09 06:49:00 GMT; path=/
>> Cache-Control: max-age=1209600
>> Expires: Sun, 16 Aug 2009 03:15:40 GMT
>> Last-Modified: Sun, 02 Aug 2009 03:15:40 GMT
>> Connection: close
>> Content-Type: text/html; charset=utf-8
>>
>> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
>>  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
>> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"
>> dir="ltr">
>>  <head>
>>
>> and the rest of the main page, down to ...
>>
>>    </div> <!-- /container -->
>>  </div>
>> <!-- /layout -->
>>
>>  </body>
>> </html>
>>
>> > http://www.textfiles.com/hacking/INTERNET/netcat.txt
>> >
>> > 3) Or nmap the server?
>> >
>> > # nmap -P0 servername
>>
>> Through the WRT54GS
>>
>> Starting Nmap 4.76 ( http://nmap.org ) at 2009-08-01 19:09 MST
>> Interesting ports on 66.116.193.208:
>> Not shown: 999 closed ports
>> PORT   STATE SERVICE
>> 21/tcp open  ftp
>>
>> Nmap done: 1 IP address (1 host up) scanned in 41.80 seconds
>>
>> Pulling the WRT54GS out of the loop,
>>
>> Starting Nmap 4.76 ( http://nmap.org ) at 2009-08-01 20:17 MST
>> Interesting ports on 66.116.193.208:
>> Not shown: 995 filtered ports
>> PORT    STATE  SERVICE
>> 20/tcp  closed ftp-data
>> 21/tcp  open   ftp
>> 80/tcp  open   http
>> 443/tcp open   https
>> 873/tcp closed rsync
>>
>> Nmap done: 1 IP address (1 host up) scanned in 22.29 seconds
>>
>> >
>> > > I've talked with my hosting company and they swear up and down that
>> > > nothing has changed and the sites are working as normal.
>> >
>> > Do you have cookies in place - clear your browser cookies?  Try another
>> > browser?
>> >
>> > Netcat, traceroute and nmap will bypass the browser, but just in case...
>>
>> Have tried clearing the browser cache several times and have tried
>> Kubuntu,
>> Windows XP, and Windows Vista. For browsers, I've tried Firefox, IE 7 and
>> 8,
>> Konqueror, and Google Chrome.
>>
>> > Also did you change your dns server settings in your /etc/resolv.conf?
>> > Check to make sure your nslookup is the same.
>> >
>> > Did you possibly setup a hosts file hack to work on a mock up of the
>> > website and forget it on your own box?  Verify /etc/hosts file...
>>
>> Have not touched either the /etc/resolve.conf.
>>
>> No special hosts files, or anything like that.
>>
>> So I'm completely at a loss to explain why only a certain group of
>> websites
>> would be shut down by this router (that has been reset to factory defaults
>> and
>> has just had the latest firmware installed).
>>
>> Jason Hayes
>>
>>
>>
>> >
>> > > While fighting with this, I've updated the firmware (to the latest
>> > > version - V
>> > > 7.2.06), reset all the settings to factory default, and re-set up my
>> home
>> > > network.
>> >
>> > Are other machines on your network doing the same thing?
>> > Have someone come over and fire up their laptop to rule out XSS
>> > plugins and other hacks?
>> >
>> > > Everything is fine except for those few websites. Anyone ever seen
>> > > anything like this?
>> > > --
>> > > Jason Hayes
>>
>>
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