Create an account with www.dyndns.com
Click on MY ACCOUNT
Click on MY HOSTS
Click on ADD NEW HOST
Choose your HOSTNAME (say you choose “abc”)
Choose your domain name (say you choose “homedns.org”)
Choose Service Type HOST WITH IP ADDRESS
Add any IP address in the IP ADDRESS field.
Click ADD TO CART
Click “PROCEED TO CHECKOUT”
Click “ACTIVATE SERVICES”

https://www.dyndns.com/support/kb/using_inadyn_with_dyndns_services.html

Download the most recent version of INADYN
cd /usr/local/
wget http://cdn.dyndns.com/inadyn.zip
unzip inadyn.zip
cd inadyn
make
It will install the program in
/usr/local/inadyn/bin/linux/
Configuration File
Inadyn can be configured by command line options or by a configuration file. A default configuration file is /etc/inadyn.conf under Unix systems. The location of the config file can be given to inadyn via –input_file option.
Update the /etc/inadyn.conf file with the following. Make sure to update the USERNAME and PASSWORD for the dyndns.org account information.
## inadyn configuration file
update_period_sec 600 # Check for a new IP every 600 seconds
# DynDNS username and password here
username ##YOUR USERNAME##
password ##YOUR PASSWORD##
dyndns_system dyndns@dyndns.org
## Dynamic DNS hosts
alias abc.homedns.org

Run the program
cd /usr/local/inadyn/bin/linux/
./inadyn –input_file /etc/inadyn.conf –background
if you have reboot the machine, run the same command again.

Now this script will check if the IP is changed every 10 minutes. If there is any change in IP your DNS record will be update automatically.
Now you can use your new DNS name in Manage IP field and our system will automatically forward calls to new IP as so as our system sees new IP for your DNS Name.

VoIP Service Provider
www.didforsale.com

• Our Product Quality continues to beat the charts: DIDforSale offers inbound and outbound DID products. In the recent survey majority of our Users rated our product to be of superior quality. Superior DID quality has been one of the top five goals for DIDforsale and there have been multiple efforts made by the team to maintain their quality standards beyond the industry. Its due to this unbeatable quality that DIDforSale has high customer retention rate.
  The product quality survey results clearly state that:-

91.5% customer have rated our product beyond average.
93.7% customer have rated the SIP DID voice quality to be beyond average. And
91.5% have rated product quality to be beyond average.

• Customer Service: Along with the product quality Customer Service is one of the areas of prime focus for the DIDforSale team. Where 83% of our clients have rated our customer support to be beyond average we still strive to increase this number. One of our slogans for the year is “Leave no customer behind”.

• Cheapest DID provider in USA: While the product quality is superior DIDforSale is one of the cheapest SIP DID provider in USA. There is no compromise on the DID quality for the price. Low cost DID with multiple channels topped with superior product quality gives all the more reason for businesses to partner with DIDforSale.  Our Survey results reflect how our clients feel about our price is.
   

  

  • Recommendable Service?: One of the questions on the survey asked if the existing clients would recommend DIDforsale to others and we were totally thrilled with the responses. 75% of our clients would absolutely recommend DIDforSale as a leading SIP DID provider in US with great customer support. 19.30% say they may recommend our service provided they would like DIDforSale to expand their market in Canada & Europe.
    

  
  

   

  
  

Best VoIP Service Providers

www.didforsale.com

Some of our customers switched to didforsale and saving lots of money every month. We offer Inbound Virtual numbers specially designed for calling card companies and call centers. Our flat rate inbound DID are just $8.99 per month. Each DID comes with 20 channels where 20 people can call at the same time. Normally a good calling card company takes 50 to 300 numbers and uses 400 to 2000 simultaneous channels. So lets take an average of 150 numbers and 600 channels.

Your cost at DIDforsale will be $8 x 150 = $1200 + tax per month. You don’t have to pay anything extra, no per minute charges and no per channels costs. While other VoIP service providers charges very low cost on the DID but charges very high price on per channel cost. Based on our research average market price is $1 per DID and $12 per channels. So the same company with 150 DID and 600 channels will be paying:
150 x $1 + $12 x 600 = $7350 per month.

Compare the prices $1200 vs $7350.

Talk to our sales professional and let us help you save money on your VoIP needs.

VoIP Service Provider
www.didforsale.com

VoIP Service Provider,
www.didforsale.com

Most common used tool are: Ngrep, Wireshark, TCPdump.

Ngrep:
We often use ngrep to monitor our VoIP services, because it is very simple and light. If you don’t have it installed, then you can download it from this link
http://yum.trixbox.org/centos/5/old/repodata/repoview/ngrep-0-1.45-1.el5.rf.html
http://yum.trixbox.org/centos/5/old/ngrep-1.45-1.el5.rf.i386.rpm

This command will capture everything on SIP port (I know this can capture any network activity, but I am using it for VoIP on SIP ) and dump the data on the screen. Easiest way to know how your system in interacting with your vendor or client.
See everything on your system on SIP protocol.

ngrep port 5060

If you want to filter the traffic based on phone number
ngrep ‘9498859944’ port 5060

If you want to filter traffic based on IP address
ngrep ‘IPAddress’ port 5060
Example
ngrep ‘209.201.2.255’ port 5060

Other important options
-t     Print a timestamp in the form of YYYY/MM/DD
-T     Print a timestamp in the form of +S.UUUUUU, indicating the delta between packet matches.
Example
ngrep  -t ‘9498859944’ port 5060
ngrep  -T ‘9498859944’ port 5060

As I said there are lot more options read man pages ‘man ngrep’, but this is good enough to see the call flow on your system.

VoIP Provider,
www.didforsale.com