my current problem is that I want to ping all the systems that start with given set of characters and get the systems that are responsive to a text file. I do not know the complete hostnames, I just know they start with a specific set of letters.
For example, I want to ping all the systems that start with 'DIM' from the entire network.
Is something like this possible?
thanks a lot for any help!
Related
Basically, this is going to probably an incredibly generic and poorly crafted question. I do apologise in advance for that and hope you can look past that and potentially offer some solutions/help.
I am looking at starting a new project, which I guess functions similar to Shopify in a way. Users will pay a monthly fee and then get their own website which has a store-style thing on it.
I am comfortable with most aspects of making this, however, the one thing I'm not completely sure how to do is if they want to have a custom domain (which I assume most customers would). Based on my experience with services such as Spotify and Tictail, to do this I am going to have to get them to change their nameservers to my nameservers. After that, I'm not completely sure how it will function and how to set it up. All of the files for the sites are going to be pretty much the exact same so I don't need much to change there.
So basically my main question is, how would I develop it to automatically host certain content when someone sets their nameservers as my nameservers? I would like it to be completely automatic if possible, but I don't mind if there is a little manual input.
I'm super sorry if the question isn't worded properly or if it's confusing as I've never developed something like this. A simple point in the right direction would be much appreciated as I'm not too sure where to start with this.
Thanks
It depends on the server technology you use to provide such user related nameservers. If I understand you properly, you are looking to get something like:
# Your service runs here:
http://yourdomain.com
# For the user account (user specific application)
http://{unique_username}.yourdomain.com/
# Then you would have (for N users)
http://username0.yourdomain.com/
http://username1.yourdomain.com/
...
http://usernameN.yourdomain.com/
The way you have to avoid dns hijacking is to actually specify the nameserver in the server host configuration. There are many servers around which provide virtual host configurations to allow many different domain names in the same ip address.
As an example, in nginx this can be done using virtual hosts. In your case you would need to programatically create them. In order to do so, a file must be added to the folder /etc/nginx/sites-available. This could be a file called: /etc/nginx/sites-available/username0 with this content:
server {
listen 80
server_name username0.yourdomain.com;
root /path/to/app/;
...
}
So for your solution, you would create a file per customer user. In order to activate a new created virtualhost (server block), link it in the folder with path: /etc/nginx/sites-enabled
ln -s /etc/nginx/sites-avaible/username1 /etc/nginx/sites-enabled/username1
sudo service nginx reload
Read more about dns hijacking here and have a look to virtual hosts implementations, like the nginx server blocks shown above, or the apache virtual hosts.
Good luck!
The Openshift 'all-in-one' Vagrant box uses xip.io. The security team at my company has relayed to us that using 'xip.io' for a wildcard DNS could cause some security concerns. So given that 'xip.io' is not an option, how can I get this set up?
We ran into a similar issue at my company. The best answer, which is a bit dire, is that you'll need to set up your own custom DNS. Sorry to say because it is a bit annoying to do but not all that bad. Use this link, it should give you some guidance.
Basically, you'll need to /etc/dnsmasq.conf file to look like:
# Reverse DNS record for master
host-record=master.example.com,192.168.1.100
# Wildcard DNS for OpenShift Applications - Points to Router
address=/apps.example.com/192.168.1.100
The article goes into great detail. I'm not sure how network savvy you are, but if you're not, then I'd suggest roping in one of your ops guys to assist with this. Without a relatively good understanding of networking, setting this up would be quite difficult.
I understand that you can do this without requiring your own DNS.
Quickest way is to manually add required entries to /etc/hosts of your host system, mapping them to IP address that xip.io address would map to.
Alternatively set up dnsmasq something like the following.
$ cat /usr/local/etc/dnsmasq.conf
address=/.10.2.2.2.xip.io/10.2.2.2
address=/.ain1/10.2.2.2
address=/.10.1.2.2.xip.io/10.1.2.2
address=/.cdk/10.1.2.2
$ls /etc/resolver/
ain1 ain1-xip cdk cdk-xip ddns
$cat /etc/resolver/cdk-xip
domain 10.1.2.2.xip.io
nameserver 127.0.0.1
This is cut and paste from elsewhere and I don't use CDK myself so not sure about the IP addresses here, but I understand this shouldn't require you to set up separate DNS. The 'ain1' entry is for the OpenShift Origin all in one VM, which is equivalent to CDK for OpenShift, but using latest Origin upstream version.
I recently purchased another NIC for my computer so I could separate LAN-traffic from internet-traffic.
Long story short: How do I set it up to selectively use a certain NIC?
I'm using Windows 7 64bit, but am also interested in finding it out for Linux.
So far I found something concerning regedit with RandomAdapter = 1.
However that doesn't seem to be working as Skype is confused which card to use and general traffic still goes through the same NIC.
I also use a Switch behind my PC and between my router, but I am willing to invest in a... I forgot the 4-letter-combination capable switch that lets me utilize that function.
Could you please share your wisdom with me?
Any help is appreciated!
edit 01: Accepted solution by Amit:
So do I have to delete ALL routes and then make 2 new ones, one for each NIC ?
route -f
route ADD 192.168.X.IP1 MASK 255.255.255.0 192.168.X.X METRIC 10
route ADD 192.168.X.IP2 MASK 255.255.255.0 192.168.X.X METRIC 10
Is this correct?
For windows, this can be set up with the command line utility "route".
Open a command prompt, type route /? and go from there...
Many applications allow you to bind to a specific IP address, see the settings pages.
I'm facing to this problem. I spent much time by searching some API or "something" with it's possible to obtain transferred data through Wi-Fi from other applications (how screenshot bellow shows).
Does someone know a way how to do it? Is here someone who tried (or has already done) for something similar? Or a little differently: Is this possible to do it?
Currently i think that this is not possible because i think that non-system application cannot retrieve data from other application(s) installed on device. But maybe i can "missing" something so i placed this question and will be glad for whatever suggestion.
Thanks in advance!
TrafficStats
Class that provides network traffic statistics. These statistics include bytes transmitted and received and network packets transmitted and received, over all interfaces, over the mobile interface, and on a per-UID basis.
This means you can use getUidTxBytes to get whole transmitted data and so far getUidRxBytes to get whole received data.
And you can get application's UID with:
getApplicationInfo().uid
or for other applications refer THIS
While Sercan's answer is correct, must warn you that TrafficStats is not always guaranteed to give you correct stats. Basically TrafficStats will check files in the directory /proc/uid_stat/1094/ and various files like tcp_snd, tcp_rcv etc under this directory. On some devices, these (pseudo)files are not updated. Hence you should always check for a return value of UNSUPPORTED (-1) http://developer.android.com/reference/android/net/TrafficStats.html#UNSUPPORTED
Also, typically these stats have not been including UDP data. So the numbers you report will be wrong for apps that use UDP (like VoIP apps). For more details, look at
https://code.google.com/p/android/issues/detail?id=32410
On latest Android versions, there is another /proc file that gives you a lot of details. This is at /proc/self/net/xt_qtaguid/stats. But this pseudo file will only show the stats of an app reading that. Any Android app tries to read this file, it will not get stats related to any other Android app.
Why not try reading config files containing network information?
try this:
adb shell
cd /proc/uid_stat/XXXX(Proc id)
cat tcp_rcv/tcp_snd
We have a customer who wants to go through their CRM database and somehow determine phone numbers which are valid, without actually having someone sit there and try calling them all.
Is there any way to do something akin to a "ping" on a phone number (including landlines)?
You will need to go through a third party. I have used Melissa data for address verification with good success, they also offer phone verification, but I have not used it
http://www.melissadata.com/listservices/resphoneverify.htm
If getting a 100% correct phone number is crucial, I'd look into a service which would actually call the number, give a verification code and make the user confirm that code with the site. It is a PIA from the users perspective, but that is the most complete route you can take. Doing a quick little googling came up with this site, http://www.phoneconfirm.com which seems to do what I mentioned. I am sure there are others though.
If you can't/don't want to go through a third party, I can't imagine writing something like this yourself would be impossible. Scaling it would be the biggest issue.
could always go with the good ole war dialer
I believe a CTI system using ISDN calling based service can quickly return a status code that the number is either valid/invalid before the destination begins to ring.
One vendor is Katalina systems, their product is called VoiceGuide and they have a dialling out module that may give you what you want. see www.voiceguide.com.
Just export the calling list to the dialler (csv file) and review the call status after processing.
If the list is very large, it may justify purchasing a system to do this. The rate of calling depends upon the number of lines installed/availble. You might require some custom modifications to abort the call after obtaining the status. Katalina should be able to help. I am not sure if VoIP trunks can give you full access to the line status.
I once did something like that. Yeah, for telemarketers. And yeah, it haunts my conscience to this day.
It was based on a module called app_amd.c (Answering Machine Detection) which was a third party add-on for Asterisk and, AFAIK, can be found in their main tree now. With an E1/T1, you can also distinguish between bad numbers, busy, and many other status codes. Look that up, it may help.