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Old 03-01-2015, 03:52 PM   #1
MrUmunhum
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can't access my web server from outside my network.


Hello group,

I have been getting reports that my web server can't be accessed.
This is a new problem. I beleive it is a problem with one of my LinkSys
routers? I can reach it on the interanet just fine.

In order to debug the problem I need an outside system that I can access
to do thing like ping, traceroute and nmap. Are there any system open
to the publc for free? All I need is a general user ID, no root access is
needed. I would like Ethernet SSL access but dialup would work.

My server is at http://64.124.13.3.

Any help would be appreciated. Please contact me with Email.
 
Old 03-02-2015, 08:53 AM   #2
Habitual
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Code:
nmap -PNO -sV 64.124.13.3 -p 80
80/tcp filtered http

Seems port 80 is only open for some requestors.

Is port 80 being filtered on the router?
Is port 80 forwarded to a system with a firewall restricting port 80?
 
Old 03-03-2015, 07:48 AM   #3
maples
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Quote:
Originally Posted by MrUmunhum View Post
Please contact me with Email.
From the LQ Rules (which you agreed to when you signed up here):
Quote:
Originally Posted by LQ Rules
Please do not post requests for help via email, IM or other personal communication channels.
This is so that future people with the same problem who find this thread can find the answers that they're looking for. Also, it allows a better discussion of how to fix your problem.

It sounds like your issue is with port forwarding. Go into your router's settings and forward port 80 to your Linux box. It helps if you set a static IP for your webserver.

You might also want to consider a free dynamic DNS service so you can give people a URL instead of just an IP address (which can and probably will change).
 
Old 03-03-2015, 02:39 PM   #4
MrUmunhum
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Quote:
Originally Posted by Habitual View Post
Code:
nmap -PNO -sV 64.124.13.3 -p 80
80/tcp filtered http

Seems port 80 is only open for some requestors.

Is port 80 being filtered on the router?
Is port 80 forwarded to a system with a firewall restricting port 80?
When I do this from the inside, I get:
nmap -PNO -sV 64.124.13.3 -p 80

Starting Nmap 6.45 ( http://nmap.org ) at 2015-03-03 12:19 PST
Nmap scan report for 64.124.13.3.gatespeed.com (64.124.13.3)
Host is up (0.0076s latency).
PORT STATE SERVICE VERSION
80/tcp open http Apache httpd 2.2.22 ((Debian))

Service detection performed. Please report any incorrect results at http://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 15.20 seconds

Which shows me I am getting port forwarding to my Raspberry Pi web server.
But shows not filtered??
On my web server:
root:~; iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination

Chain FORWARD (policy ACCEPT)
target prot opt source destination

Chain OUTPUT (policy ACCEPT)
target prot opt source destination
The firewall on my LinkSys router is doing the filtering. I don't know why it is showing filtered from the outside?
 
Old 03-03-2015, 02:56 PM   #5
MrUmunhum
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Quote:
Originally Posted by maples View Post
From the LQ Rules (which you agreed to when you signed up here):


This is so that future people with the same problem who find this thread can find the answers that they're looking for. Also, it allows a better discussion of how to fix your problem.
OK, my bad.
Quote:
It sounds like your issue is with port forwarding. Go into your router's settings and forward port 80 to your Linux box. It helps if you set a static IP for your webserver.
This is how the router is set up. It used to work.
Quote:
You might also want to consider a free dynamic DNS service so you can give people a URL instead of just an IP address (which can and probably will change).
I have had this address for ten years. I do have a DNS naame of This has just been renewed.

The router is using E-wrt, which is not supported any more. I used to be able to access the router with SSL and web bit not any more. Sounds lie to it time to replace that router and/or the firmware (DD-wrt)? This could also explain my poor down link performance. maybe?
 
Old 03-05-2015, 09:24 AM   #6
onebuck
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Moderator response

Moved: This thread is more suitable in <Linux-Networking> and has been moved accordingly to help your thread/question get the exposure it deserves.
 
Old 04-26-2015, 06:57 PM   #7
MrUmunhum
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Thumbs up

Update:
I found a public web site that allows me to do a traceroute from the outside of my private network. http://http://www.nmonitoring.com/
It shows/suggest the problem is with my ISP.
Quote:
Network Trace

Resolving from DMAGENTCA to 64.124.13.3, 64.124.13.3 (4/26/2015 2:04:22 PM-4/26/2015 2:04:38 PM)
Hostname Nr Loss % Best Avg Worst Last Error
64.62.134.233 1 0 0 1.3 3
10ge1-1.core1.sjc2.he.net [72.52.92.74] 2 0 0 2.5 8
mpr1.sjc7.us [206.223.116.86] 3 0 0 7.8 30
ae9.cr1.sjc2.us.zip.zayo.com [64.125.31.201] 4 0 1 11.3 42
ae4.mpr1.sjc3.us.zip.zayo.com [64.125.28.42] 5 0 1 7.0 25
128.177.59.234.ipyx-080649-zyo.zip.zayo.com [128.177.59.234] 6 0 1 1.0 1
cruzio-216-173-128-106.static.cruzio.com [216.173.128.106] 7 0 1 1.8 2
cruzio-216-173-128-90.static.cruzio.com [216.173.128.90] 8 0 2 2.0 2
No response from host 9 100 * * * Icmp error: 410 Request timeout.
No response from host 10 100 * * * Icmp error: 410 Request timeout.
I have opened yet another ticket with the ISP and am waiting for their response. I will keep you posted.

I can't tell you how helpful http://www.nmonitoring.com/ has been in resolving my problem. Highly recommended.

Last edited by MrUmunhum; 04-26-2015 at 07:28 PM.
 
Old 06-27-2015, 08:19 PM   #8
MrUmunhum
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OK my problem has been solved. The problem was with one of
the WRT54G LinkSys routers. It was running Ewrt and the port
forwarding feature started to have intermittent problems. I replaced
it with a WRT54G router running DD-wrt. The problem
was compounded by my ISP changing my IP address. The old address was 64.124.13.3, it is now 216.173.131.138.

The key to solving the problem was finding a remote site to
test the outside link access. There are many sites that will
help with this. I used ping.eu and pingdom.com both. The reason
I needed a remote site to test the port forwarding link
which was flaky and worked from the network inside but not from the outside. Everything is working correctly.

Thanks for your time and support.
 
  


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