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Is it possible combine 2 different internet connections from 2 different ISPs?

Is it possible combine 2 different internet connections from 2 different ISPs?


Technically, yes, anything’s possible. :-). In reality though, this is usually left to the realm of high-end routers; there’s no pre-packaged solution for multiple computers that I’m aware of. A single computer can sometimes make use of multiple connections which is similar to having two network cards.

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39 comments on “Is it possible combine 2 different internet connections from 2 different ISPs?”

  1. I don’t think having two network cards is the same as strapping two internet connections together, which is what I’m trying to do and I think was the original question, in my case it is to increase internet bandwidth as it would be cheaper than SDSL. Having 2 network cards does not increase bandwidth, there must be more to it than that. I have a wireless network and a wired network running off two different network cards, this does not increase my bandwidth. So can anyone answer this question. Can you combine multiple internet connections to increase bandwidth and if so how?

  2. I have a similar configuration. I use one computer on my network as the router using Internet connection sharing, but i also have two internet connections and would like to combine their bandwith. I have a cable modem connection and a wireless connection. It has been suggested to me that a firewall can be used to distribute traffic between the two adapters, but it seems like a very messy solution

  3. Dual Wan Routers dont double your ‘speed’ They increase your bandwidth. If you DL a 2MB file it will not DL any faster with two WANs, but if you D?L 2 such files they will each DL at the same time via balancing..

  4. Russell is 100% right, 2 connections means 2 IP’s. if you are downloading a 2MB file, the computer you are getting it from cant sent 1/2 the packets to 1 IP and the other 1/2 to the other… the best you can hope for is fast multiple tasts…

  5. This is pretty much what I want to do. I’ve been searching for a way to implement load balancing on a WinXP Pro machine. My setup includes two ethernet ports on my workstation, one is connected directly to an ADSL modem, the other is connected to an internal LAN whose router is connected to another ADSL WAN network. I want to have windows use both network connections to download more files at the same time and faster. For example, most websites limit the connections per IP to 2, this could be theoretically increased to 4 by using two separate IPs. Also, fail-over protection would be nice. Any suggestions? Thanks in advance.

  6. In general you would need to do your load balancing at the gateway/router level and not at the individual PC level. The reason is that standard TCP/IP protocol specs dictate that your operating system only use one gateway to route your traffic at a time based upon the last best known route to the destination.

    Because of that your system will not send packets out *both* NIC’s to a single destination (at least not if its conforming to standards). However if the gateway/router is intelligent enough to do the load balancing then your computer (and others on the LAN) can work as normal, stay in compliance, etc, while the gateway/router is doing the real work.

    You can use either a hardware or software based solution for providing that intelligence. A hardware solution must reside at the router/gateway level but a software solution could exist almost anywhere. Sygate Office Network would be an example of a software solution, but there are lots of others.

    Regardless, no solutions that I know of within range of consumers do true multiplexing of the data to increase overall speed. Instead you increase the overall bandwidth available to the network. This is extremely beneficial to businesses and other multi-user environments, but doesn’t do much for the individual home user environment as most load balancing solutions use an algorithym that would not benefit a single user doing a ton of usenet downloads for example….even though there are lots of small files being downloaded, and you would think therefore you would utilize both wan connections fully, the truth is that most algorithyms would look at the source headers of the data packets..see that it is from the same source…and still limit you to using only one connection. This is done because the algorithym itself is geared to optimize the internet experience for multiple users..not a single user. So instead of completely swamping both wan connections it would let you have as much as you could get from one while reserving the other for the next source packet. This is not always the case, but most products within the reach of the average consumer that do load balancing do it this way.


  7. hi frnds
    i have two dsl conections , it is connected to 4 +4 pcs,all eight pcs wont use net always,so iwant to use the maximum bandwith available is there any software hardware available,i need help urgerntly,pls send me a reply on
    thanks for ur advice in advance from my heart

  8. I have Verizon dsl I have 2 connections 1 wont run without the other I have a lan and verizon [default] connection 1 wont run without the other when I first got dsl it loaded as lan Local Area Connection now I had to redo it for some reason and it now has 2 connections any suggestion would be appreciated Thanks

  9. Can you name some other programs like Sygate Office Network? Since they are no longer offering Sygate Office Network. Unless you know of where I can obtain a copy of Sygate Office Network? I would like to attemped the double internet connection with a software program but I can not find one. Please help me out thank you.

  10. I’m sorry I didn’t understand Matt’s answer, I know so little about PCs/networking, I was wondering, does anyone know: How do you choose which ISP/connection to use when web-browsing? I have two connections, with two ISPs, two phone lines, one with USB modem and one with wireless adapter(obviously connected through a different PC). I also have an ethernet connection I can use and have used. For emails, it’s easy to choose the connection, using Outlook Express. I am using Firefox as my web browser, and I don’t understand their connection settings, it’s all about proxies and I haven’t a clue if that’s how to set it up, and, if so, how, i.e. what settings to put in. Any ideas? Thanks a lot if you can help.

  11. Hello Friends,

    I Am using 3 DSL Connections, 2 from one ISP and one from the other. Now I need to Bunch them all (Multiplexing) to get one single output line. Pls suggest me how to do it.

  12. hi i have 5 ips and want to connect 17 pcs i used 3 ips for 3 pcs, 2 1 ip share with 7 pc`s and another with 7 pc`s now i have 3 networks. i have printer which i want to share for all pc`s can anyone give me idea how to do that or how can i combine my 3 networks so i can share my bandwitdh and sharing resources. please mail me on

  13. Yes it i s posible to do that with very simple equipments and you can combine as many networks and internet conections as you wish and share the bandwith with single or multiple computers but only one company that i know dos have technology to do that witch is MAHA PC INC.
    you can contact them and ask them how to do that by visiting under network and spacial internet access tab.

  14. Yes it is posible and ther is a company out ther witch I know is doing it. In fact thay have don it for me and it works Grate and now I am using 4 Fiberuptich lines with total speed of 80 MBPS same up and down streem on my network by using a single Linksys wireless G Router and have 2 wired and 12 wireless computers conacted to internet and secure network.
    you can have themset it up for you as will by calling (888) 462-0476 or visiting
    thay even have UK and AU Local Numbers if you are from Austoralia or United Kingdom.
    Hope that I could be of help to you 🙂

  15. I am using 2 Internet lines, 1 is Broadband wireless and 1 is Satellite(IP Star), they are diffrent IPS and they have different proxy gateway. Currently I using 200 PCs, So I build the local proxy server with ISA 2004 Standard. Now I need the bunch these two lines(Multplexing) also need load balancing, pls let me know how can I do this.

  16. I also have two broadbend 256k connections at the same ISP, and I want to combine it into one 512k. Is there any software solution for this or I need to buy a router or something?

  17. In general, you need a special type of router to do what’s necessary to combine two connections. And even then, it’s doesn’t always get you the results you want.

  18. you can combine any tipe of connections no matter what ISP provides tham and thay do not have to be even from same ISP but ther is a spacial equepmint needed for that witch is called MAHA INTERIGATOR witch is provided by MAHA PC INC.
    as far as i know thay are the onlyone with this technology and Maha Interigators are not expensive at all
    how ever you can only buy it from them and it is not avalible in any stores
    you can se exactly what they offer by viziting
    hope that I have bin a help to you all

  19. I also have two broadbend 256k connections at the same ISP, and I want to combine it into one 512k. Is there any software solution for this or I need to buy a router or something

  20. yes it is possible to combine, its called bonding adsl but you will also require a unit to install the links into. visit xrio for how this works

  21. what about with wireless connections? i sometimes can see 20 hotspots from my house. is there a router that will let me use all 20 at the same? i assume that they would have to link to a server somewhere to have a single IP address. it seems to me if someone came up with a router like this it would be extremely popular since there are so many open wifi connections these days in urban areas. and if I do the same amount of surfing I would only be using a little bit of each connection therefore not slowing down any one connection being used by someone else.

  22. vmware player wil do 4 u all using multiple broadbad connection… a single it free from brother soft

  23. I have two internet connection both are from same ISP(airtel).Both are 256 kbps broadband connection.Is it possible to combine both line.

  24. I have 2 diff copmuters. One for work and one for home. Currently I’m still using dial up at both locations. Which isp can provide highspeed internet w/out me having to pay two different bills in two locations?

  25. yes, you can combine 2 different Internet connections even without a high end router. routers are not that complicated and are essentially a highly specialized miniaturized computer. so take your old machine slap on any Linux firewall type distro. there are several, and good tutorials can be found through Google and you tube. jam extra cards into the box as needed for you internet connections the rough formula is n+1 cards where n is you number of Internet connections e.g. If i want to combine 2 internet connections I will need 3 Ethernet cards on one box. two incoming ISP connections 1 feed to my network. Also check out the article on LAN speeds and you will see that Internet connection is your bottleneck and not the Ethernet to your LAN.

  26. Almost prepackaged solutions
    – pfsense
    -ClearOS (I am currently using this so i can actively vouch and redirect people to help for this).

    Google is your buddy.


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