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Old 09-19-2017, 04:39 PM   #1
laredotornado
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How do I figure out what is blocking our connection to port 80 on our Debian box?


I'm using Debian 8. I'm trying to troubleshoot why we cannot access our dev site running in Apache (port 80). I thought we opened the internal firewall to port 80, at least, "ufw status" produces this ...

Code:
myuser@mymachine:~ $ sudo ufw status
[sudo] password for myuser:
Status: active

To                         Action      From
--                         ------      ----
22                         LIMIT       Anywhere
Anywhere                   DENY        218.67.129.36 22
22/tcp                     LIMIT       Anywhere
22/udp                     LIMIT       Anywhere
80                         ALLOW       Anywhere
22                         LIMIT       Anywhere (v6)
22/tcp                     LIMIT       Anywhere (v6)
22/udp                     LIMIT       Anywhere (v6)
80                         ALLOW       Anywhere (v6)
However, using "http://192.168.0.255" from ifconfig

Code:
myuser@mymachine:~ $ ifconfig
eth0      Link encap:Ethernet  HWaddr b8:37:ae:d2:3f:29
          inet addr:192.168.0.114  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::d964:f94e:233d:6f55/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:23384 errors:0 dropped:4 overruns:0 frame:0
          TX packets:8640 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:8872950 (8.4 MiB)  TX bytes:1041578 (1017.1 KiB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:2639603 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2639603 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1
          RX bytes:421417413 (401.8 MiB)  TX bytes:421417413 (401.8 MiB)
I'm still unable to connect to the server. I'm wondering if we still haven't configured the Debian firewall properly. What other tweaks do we need to make to the Debian firewall to allow access externally on port 80?
 
Old 09-19-2017, 05:22 PM   #2
jefro
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When you are on this particular web server computer, what happens when you try to access the web address?
 
Old 09-19-2017, 09:01 PM   #3
frankbell
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Are you trying to access the machine locally from within your LAN?

If you are trying to access the address from the Big Wide World, know that many ISPs (including mine) block port 80 for any but business level accounts.

Last edited by frankbell; 09-19-2017 at 09:04 PM.
 
Old 09-20-2017, 02:28 AM   #4
JJJCR
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try posting the output of this:

netstat -ntlup | grep 80
 
  


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