private and public ipaddress on azure cloud - azure

Question

I'm trying to run gwan on an Azure cloud machine. But I get issues with network interfaces, or I simply cannot hit the machine with the browser.
I believe the issue has to do with internal IP address assigned by the Azure router, but also I could be missing some critical security issue (or something else)
The machine is running CentOS.
Here is my configuration:
/etc/sysconfig/iptables-config
added a rule for accepting traffic via port 80
-A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
/etc/hosts
added the public IP address and mapped that to a subdomain of cloudapp.net
192.12.45.23 myappname.cloudapp.net
gwan_linux64-bit
changed the directories to suit the public IP.
mv 0.0.0.0_8080/#0.0.0.0
192.12.45.23_80/#192.12.45.23
run gwan
sudo ./gwan
can't listen on 168.62.8.160:80 (Cannot assign requested address)
Available network interfaces (2):
127.0.0.1 12.109.24.35
Then I tried both 12.109.24.35 and 127.0.0.1 interfaces -
gwan ran without an error, but I couldn't browse the machine using the public IP of 168.62.8.160:80
further info:
/etc/sysconfig/network doesnt use the FQDN myappname.cloudapp.net but
HOSTNAME=myappname
NETWORKING=yes
as well, /etc/sysconfig/network-scripts/ifcfg-eth0
DHCP_HOSTNAME=myappname
DEVICE=eth0

Answer 1

I don't know Azure and its specificities. But it seems that you are missing a system configuration for your IP address (a problem that has little to do with G-WAN).
Your error is:
"can't listen on 168.62.8.160:80
Available network interfaces (2): 127.0.0.1 12.109.24.35"
On a Linux machine you would have to assign the 168.62.8.160 IP address to one of your network adapters in order for the system to be able to use it.
For temporary changes: ifconfig eth0:1 168.62.8.160
For permanent changes:
vim /etc/network/interfaces
--------------------------------------------------------------
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet static
address 12.109.24.35
network ... // replace ... by the relevant data
netmask ... // replace ... by the relevant data
auto eth0:1
iface eth0:1 inet static
address 168.62.8.160
network ... // replace ... by the relevant data
netmask ... // replace ... by the relevant data
--------------------------------------------------------------
...and then run: /etc/init.d/networking restart
That's what would work if you were running Linux, just in case that may help to understand what you are missing on Microsoft Azure.