I am wondering which connection gets stuck with the data charges in the following situation:
1 Windows 7 PC with default VPN connection active
- connect to video streaming service to watch a movie
- disconnect the vpn (stream keeps running)
Now, for some types of VPN you get charged for quantity of data and I am wondering if in the above situation the data used by the video stream is charged to the VPN. Is there a way to check?
Thanks!
Basically, as soon as you disconnect the VPN connection, traffics flow over your ISP but to make sure if it's still passing through your VPN gateway you can utilize tracert command on windows to get a trace of the route that packets take to reach the destination.
e.g. tracert www.hulu.com
You can also use an IP address instead of a DNS name.
Related
I've got a cloud backup programme that I'd like to only run when connected to one particular wifi network / LAN. As the other networks I connect to regularly dont have another bandwidth to backup the computer over the internet.
I've been thinking of ways to Block / Allow outgoing connection to select services / sites based on what LAN / wireless network your connected to, and have looked at some GUI apps such as Little Snitch and Tripmode, but these both work on the principal of blocking all outgoing connections and having you manually approve each new connection, they also let you do this on a per network basis.
Really I just want to block 1 outgoing connection, which got me thinking of ways to do this, could i add the site / service i want to block to my DNS block list, but only have it triggered conditionally when connected to a pre defined wifi network / LAN (I can't do this on an external IP basis as I have a dynamic IP at the site where I want to backup from).
I'm running OSX 10.10.5
You can use something like Control plane to run script on location change.
The script, for example, can add a line to /etc/hosts with the backup endpoint address pointing to localhost.
I am having a strange issue. I am working on sms module for one of the client.
So, I am using Kannel to connect to SMSC server. At the very first attempt means after restarting both client and server applications . I am able to connect to SMSC with one active connections but, after some time server is having multiple connections for My IP although i am having only one connection at that time . Because , of this we are not able to receive MOs properly there is a huge MO drop. To overcome this problem we has to restart both client and server applications frequently. Which is not a proper solution So, server requested me to resolve our end as they have multiple partners and they are not facing this issue.
Background :
Before , they have provided us a ip(public ip) and port to connect to SMSC .Asked our IP(public ip) to make whitlist at their end. And they have provided VPN settings after VPN configured we are successfully connected to SMSC. They have masked our IP at their end to treat as local IP.
So, Please help me to resolve this multiple connections error as i am new to kannel and SMPP.
I had the same exact issue with another SMPP client app, it was NowSMS, and also, it was very strange as my NowSMS is connected to +15 SPs since 7 years ago, and I had no such issue with anyone of them. But, NowSMS told me that there's an understandable issue at SP's side and after a some investigations, we noticed that the SP deals with the first established connection only and ignores the other connections, although, I had one single connection only and all previous connections were closed from my side before establishing a new one.
So, please discuss the same with your SP, otherwise, share the full config here as you may have something incorrect.
BTW, did you try getting a live TCP trace from your side and SP's side at the same time?
I configured my Windows 8 machine that it listens to magic packages send from other PCs to start it. It works very good. BUT I don't want to explicitly send a magic package, I would rather prefer it if I could send a magic package automatically when I try to access the PC over network.
I tryed using an smbclient event (30803). I configured this event to trigger a command line WOL. But This command will be triggered each time I get this event, no matter which PC I try to reach. I don't want to wake up PC-X when I actually try to access PC-Y.
Is there another way?
This sounds interesting... a possible solution would be, create a windows service and install it on the server or a computer that uses to be up. This service basically would be a network sniffer that captures all tcp traffic in network. It would have a table with ips and MAC addresses (to get MAC from an IP) that should be filled previously with manually or better... from ARP table (I did a program that gets IP / MAC from ARP table but has its issues... so each machine plugged on the LAN will get its MAC / IP), also this service would have last date ping done to each IP.
Then... how it would work... the service would capture all TCP packets and make a list of distinct IP, then each second or two get all distinct IPs (this will guarantee that the service is not consuming a lot of system resources), and on each distinct ip check last ping: if last ping was done successfully in last 5 or 10 minutes nothing is done (machine is guessed up), if no ping done or success in 5-10 minutes a ping is made. Based on ping response... if the machine is not responging magic packet is sent to MAC (provided from ARP when machine is up or manually as commented before). If ping responds nothing is done. Ping result and date is stored to avoid pings to all machines every time. Instead of ping also its possible to do it reading ARP table.
I this approach, system resources are preserved, and pings are made with sense, also magic packets are not sent if machine is up or guessed up.
Note that firewall should allow ICMP.
I have been reading about setting up a ping tunnel to access the internet when you can only send ICMP packets. Ptunnel seems to be a popular program and the instructions to use it can be found here http://www.cs.uit.no/~daniels/PingTunnel/. The instructions to this program say that you must have both a client and proxy computer.
I do not understand the benefit of a ping tunnel if you must have a proxy computer that can send TCP/IP packets. If I had a computer that could do that, I wouldn't need to set up the tunnel in the first place. Can someone please explain this to me, why is a proxy necessary and if it is how is ping tunneling useful then?
NSNolan
Well, let's assume you have a server (PC running linux for example) in your home where it has total internet access and now you are at work/airport/hotel with your laptop where you have no access to tcp without paying.By setting an icmp or dns tunnel you can "encode" your packets to appear as if they were pings/nslookup, those packets destination is always your server. When the server recieves those pings from you, it "decodes" them and totally understand what you are trying to reach (like a website or download a file as an example).
Then your server serves you and get the information you are seeking and "encode" them again into icmp/nslookup like packets. Those packets can reach you without any problem and once they do, your laptop can decode them back into useful information (just like the ones it would recieve with tcp). That encoding & decoding are what the Ptunnel do. Though I'm not professional I think that is the total point.
I'm using BOOST-ASIO for a simple echo client-server (there is a separate link for the client and server). When I try to run the server I use this async_tcp_echo_server 4000. For the client I use blocking_tcp_echo_client #.#.#.# 4000 (with #.#.#.# as the ip address). I'm on XP-SP3 with my computer connected to my wireless dsl modem using a usb card. After a few seconds on the client side I get this error:
Exception: connect: A connection attempt failed because the connected party did
not properly respond after a period of time, or established connection failed be
cause connected host has failed to respond
Any ideas what it could be? I turned off my firewall including the windows firewall and still I get no response. Could my port be in the incorrect range? Do I need to include a computer name to specify the machine on the network( there are other machines on the network sometimes active)? I did try running this on another computer directly connected to the dsl modem and same issue. I did ping my address and that did work for 4/4 packets.
It could be a variety of issues. Thus, it can be worthwhile to use lower level networking tools, such as netcat to serve a port on the server, and try connecting with netcat from the client side. This can help simplify the problem by removing any potential problems introduced by an application's network programming code. If the problem is identified as being a network issue, then there are a few things to check:
Verify firewall exceptions on the server.
Verify firewall exceptions in the server's network gateway.
If the server and client are on different networks, with the client trying to connect to the server's external IP, then verify that the server's gateway knows what traffic to route to the server. This may require setting up rules, such as port forwarding, in the routing device.
If the server and client are on the same network, but the client is trying to connect to the server through the network's external IP, then verify that the gateway supports looping back internal traffic destined to the external IP.
Use a network analyzer tool, such as Wireshark, to verify that the time to live field in the packets is high enough that it will not be discarded.
you could try
$ telnet server-ip 4000
from your client and see if it is possible to establish the tcp connection.