Ubuntu Networking :: Dialup Modem Computer As Internet Sharing Gateway To Wireless Access?
Mar 4, 2011
I am wanting a computer with an external dialup modem (ppp0 modem through a com port /dev/ttys1) to act as a gateway to the internet, forwarding internet traffic through ethernet (eth0 is set to static 192.168.2.2) to a router (the router is 192.168.2.1) where it will be broadcast to other wireless computers like my laptop (192.168.2.3). I've had this setup until recently when the gateway computer (the one with the modem) died. Now I'm replacing that machine with another box and an install of Ubuntu 10.10 but so far things aren't working for me.
Success so far:I have dialup access working on the new box. Took me a while to work out the configuration for getting dialup working, though the IP address is Dynamic (or it won't stay connected), "Check carrier line" is off, and "Ignore Terminal Strings (stupid mode)" is on in order to successfully connect and stay connected to my ISP. I also had to make my normal (non-root) user "lancer" a member of the "pid" group (the reboot) in order to use gnome-ppp as non-root. The laptop (192.168.2.3) is successfully connecting to the router (192.168.2.1) as I can see the router configuration page when I type http://192.168.2.1 into the laptop's web browser. This setup is unchanged from how I had it before when this was previously working and I don't want to change how the router itself is set up. What I want is to know what to fix in the new box in order to get it connected to the router (through ethernet) and bridging the internet through.
My problem is that whenever I plug in the eth0 from the gateway (192.168.2.2) to the router (192.168.2.1), Ubuntu's automatic plug-me-in network detection kicks in and I find my dialup no longer working through some kind of IP conflict (at least that's what I think it is). Maybe I don't have the "gateway" correctly assigned? (in the gateway computer for the ethernet connection, I had it pointing to itself as I don't know what to put for "gateway IP" as that is automatic So, just to check my connection, here I am pinging google (from the gateway computer which has the dialup modem) once a dialup connection has been made.
Code:
lancer@lancer-desktop:~$ ping www.google.com
PING www.l.google.com (74.125.237.17) 56(84) bytes of data.
64 bytes from 74.125.237.17: icmp_req=1 ttl=55 time=179 ms
64 bytes from 74.125.237.17: icmp_req=2 ttl=55 time=176 ms
64 bytes from 74.125.237.17: icmp_req=3 ttl=55 time=158 ms
[Code]...
What do I need to do in order to make Ubuntu of my gateway computer stay connected to my dialup but also simultaneously share an ethernet LAN to my wireless router and feed traffic to the other computers from there? I have googled this but some of the most promising instruction (e.g. http://www.ubuntugeek.com/sharing-in...in-ubuntu.html) call for packages like dnsmasq or ipmasq which seem defunct now in Ubuntu 10.10. Other pages seem to suggest dual-networks "can't be done" in Ubuntu [URL].. (what!?! I had it before my other gateway died)
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Dec 24, 2010
I have a sprint usb 3g modem that plugs in via usb. I want to be able to share that Internet though an Ethernet port so I can connect another PC or my playstation so I can steam movies or just use the INTERNET on another puter. Iv tried lots of stuff I found on Internet like firestarter for one but it doesn't want to set up right.
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May 18, 2010
I use Opensuse 11.2 & Edge/Gprs Modem to connect Internet.I configured /etc/wvdial.conf & /etc/resolv.conf. Now I can connect Internet using this command "wvdial MYNET" in terminal.Now I want to share my internet using Lan card & Netgear Router. If i connect my PC with Router using wire & change option ON BOOT find this device in ifup then it'll show in ifconfig command.
My Router IP : 192.168.0.1 & It gives my PC an IP automatically : 192.168.0.2
I can ping my router.. even I can browse Router Admin page in browser. No problem there.But now If i want to connect my net using wvdial command... net connected... but no data passing!!! If i disable Lan card in ifup then Edge/Gprs net connection again OK!
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Jan 13, 2010
Ubuntu 9.10: where's my dialup modem on my thinkpad X60s?
I'm trying to use "GNOME PPP" to connect by dialup, and it complains that it can't find my builtin modem. But XP can, and that's what I'm using at this moment. XP says the modem is on COM3.
I tried using several "/dev/tty*" entries in the GNOME-PPP setup, but none of the ones I tried worked. The GNOME-PPP default is "/dev/modem", but none such is mounted.
Is there some way I can find out where the modem is mounted, if it is? Or else, how can I mount the modem properly and test it?
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Mar 12, 2010
I have a dial-up modem in my Laptop.
Also I have a Dial-up line[Base Phone].
Can I make calls from Dialup modem [Making & Answering calls]?
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Sep 4, 2009
I have installed fedora 11 64 bit on a new computer. I have no problems accessing the computers on my local network, but can not get past the gateway. The gateway is running windows XP with IP address 192.168.0.1 and is named "internet". When I boot the new computer in windows, there is no problem. Here is the output of some commands I saw in other posts with similar problems:
$ /sbin/ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:24:8C:7F:10:0C
inet addr:192.168.0.245 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::224:8cff:fe7f:100c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
[Code]....
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Nov 26, 2009
I have F9, F10, F11 and F12 installed along with WinXP on my desktop PC. I connect to the internet thru 56K dialup modem (USR-5610B). The earlier versions of Fedora, F9, F10 and F11, all can connect via dialup modem.
My F12 installation is augmented with the following rpms - kudzu-1.2.86.2.i686, libwvstreams-4.6-5.fc12.i686 and wvdial-1.60.10.fc12.i686 (and the rpm for USR-5610B modem)
Network Configuration GUI shows ppp0 (Modem) in the Common Active Profile
However, ppp0 does NOT show up in the Network Device Control GUI, AND ACTIVATE and DEACTIVATE buttons are GREYED-OUT.
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Sep 13, 2009
I have 1 root-server with 2 NICs, both having their own internet IP addresses:
Code: eth0 = 8x.x.x.183
eth2 = 8x.x.x.205 We only have one gateway on that network:
Code: gateway = 8x.x.x.1 We want to use eth2 for postfix + http, and eth0 for all the other stuff.
How can this be setup ? With route / ip route / iptables ?
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Dec 2, 2010
I am in college and live in a dorm room. As a dorm resident, I have access to only one wired network connection and I am not allowed to connect it to a router. My primary computer is multihomed and I was hoping I could share network access (eth1) through eth0 to a router. Then I want to hook up my secondary system to the router. I am not using the WAN port on the router. I believe this makes it act like a switch, which seems to be what I want.Here is my /etc/network/interfaces file on my primary computer
Code:
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
[code].....
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Mar 10, 2010
I had started another thread about this but had a terrible subject line. Others may have this issue.Found the answer deep in the bowels of documentation. My question now is " did version 20 mess this up for everyone with dialup"?
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Sep 13, 2010
I am completely new to linux in any flavour. I installed ubuntu 10.4.1 64-bit on my Gateway NV59 laptop as a dual boot with Windows 7. The installation went just fine. When it comes to networking, I can connect to my home network when wired directly, wireless is another matter. I can connect wireless in windows just fine, so the card is physically fine.
My set up is as follows:
Gateway NV59 laptop with Atheros AR928X PCI-E wireless adapter
Linksys WRT54G router using WPA2 Personal and a class C address scheme (192.168.x.x)
(If anyone thinks it would be necessary to post actual hardware specs of the laptop, I can, but don't think it really necessary). I have followed the Wifi Wireless Troubleshooting Guide found at [URL].
When connecting to my network wirelessly, I click the icon in the top right, and choose "Create New Wireless Network". When I input my settings (SSID - not broadcast, and security type and key - WPA), it then states I am connected under the "Wireless Networks" section found in that menu, and shows my network name with a strong signal and a computer/monitor icon. When I double-click the icon, it tells me I am connected and that the connection is active, yet the actual wireless icon on the top bar is grey, not white, and has a red exclamation mark on it. According to the steps in the troubleshooting guide, my wireless card is recognized and installed, with a driver of ath9k.
When I run lsmod, the driver is listed, therefore loaded, and ndiswrapper is NOT listed. I have verified that the driver is communicating with the kernel. When I scan for my router, it is listed under Cell 04, with the correct SSID and hardware address. There do not appear to be multiple drivers loaded, and my wifi is NOT disabled. When I check to see if I'm associated with a router, iwconfig shows my network ssid under wlan0, with the correct hardware address listed under Cell:, yet I cannot ping my router's internal ip address. At this point, I ran ifconfig, and for some reason, my wireless card has been given a class A address of 10.42.43.1.
When I try to assign an ip address via dhcp, DHCPDISCOVER runs for a number of intervals and then tells me "No DHCPOFFERS received", yet my router is using dhcp to assign ips with a pool of 50, more than enough ips for all the hardware in my network. When I run the command "sudo invoke-rc.d networking restart", I get the statement "Ignoring unknown interface wlan0=wlan0" - not sure what that means, but doesn't sound good to me, and retrying to accquire an ip address through dhcp still does not work. If I attempt to assign an ip address within my network range manually, I first run the command "sudo ifconfig wlan0 down", then just out of curiosity to see if the interface is really down.
I run ifconfig again, and wlan0 is no longer listed, but now there is eth0 (my regular ethernet interface) with no ip address. AND another interface is listed - eth0:avahi with the same hardware address as eth0, and an address of 169.254.4.42 - this seems to be the default address the OS will assign when it cannot get one via dhcp, but I have no idea why it has shown up as eth0::avahi... Anyway, after entering the command "sudo ifconfig ip addr 192.168.x.x netmask 255.255.255.0 broadcast 192.168.x.255 up" with the appropriate addresses, I receive the error "addr: Unknown host".
What I have NOT tried, are the following steps:
1. Change my router to an open signal (I would prefer not to do this, but will, if it is absolutely necessary for troubleshooting)
2. Try gtk wifi, or wifi radar
3. Try booting with kernel option pci=noacpi or acpi=off (not entirely sure how to do this just yet)
4. Try wpa supplicant (not sure what this is, just noted it was in the troubleshooting guide)
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Mar 9, 2010
I have just installed ubuntu 7.10 on my computer. The problem is getting it connected to the internet using my Sony Ericsson w580i as a modem. I have used my phone to connect to the internet on XP operating system easily. Please assist me and try to give me a more simplified step by step procedure.
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Jan 21, 2010
the bsnl modem cannot access the ubuntu 9.10
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Feb 13, 2010
I have a usb modem : huawei e220.I am using ubuntu 9.10. I can't access the internet using it. I made a connection form the mobile broadband tab but every time it disconnects .Ubuntu identifies the modem but every time i try to make a connection it fails.
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Dec 31, 2010
I managed to configure my W890i phone to get access to internet through an ubuntu-based computer. It's very easy to use the phone to give internet access to the computer, but the opposite is quite more tricky. For that I've done the following
----On the phone---
-Set the USB network option to "through computer", so that the phone uses the computer's internet connection and not the opposite.
-Decide and set "Shared Network" parameters: user, pasword and workgroup.
-In "conectivity-> internet connection" set "allow local network" to "yes"
----On Ubuntu 10.04---
-Install samba, samba-client, smbfs, smbclient, firestarter and dhcp3-server
-Configure Samba (System-> Administration-> Shared folders): same workgroup as in the phone, add new user (the phone), passwd this new user. In my case the user was called "w890i" and the password given was the same.
-Once the phone is connected to the computer through USB (then select "phone mode"), a new connection appears in NetworkManager: usb0.The aim is to create a shared network that gives internet access to this device. Edit the IPv4 parameters of this new connection, set them to Manual and give an IP adress (192.168.0.1) and a subnet mask (255.255.255.0); the rest of the fields are left empty.Connect this network.
-Set firestarter to use dhcp3: sudo ln -sf /etc/init.d/dhcp3-server /etc/init.d/dhcpd
-Launch firestarter and follow the wizard. Set "allow internet shared connection", choose the device for the primary internet access, and then the device for the shared network (usb0). Then change the settings for firestarter: activate DHCP for local network, set IP to the one we gave before (192.168.0.1).
-Open dhcp3-server config file sudo gedit /etc/default/dhcp3-server And set INTERFACES="usb0"
-Set the policies of firestarter: in incoming connections, allow connections from the IP adress given to the phone (192.168.0.1). Then add rules for the ports that need to be open for this connection. I opened HTTP, HTTPS, SMB, SMTP, POP3, IMAP, IMAPS, DHCP for all the connections in the local network.
-Apply policies and start the firewall.
------------
After all this, the phone can access the internet through the computer. Two problems appeared:
1. I couldn't get access to https sites, like webmails. The phone gave a "communication error". But then I tried with Opera instead of the browser built in the phone's firmware, and I could finally get to https sites.
2. I couldn't retrieve mail, neither POP nor IMAP nor IMAPS. I thought it was a firmware problem again, and I tried out several mobile phone email clients written in java, but none of them worked.
So this is at the moment the problem. If I connect from the phone to the internet directly through 3G, the email clients work for all my accounts. I don't think it's a firewall problem, because the ports are opened for this connection
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Jan 16, 2011
i would like to setup one of my old pcs as a file server and internet gateway; we are living in a large building shared with 40 others. the ubuntu box would be the one connected to the internet via ethernet and sharing connexion via wifi. i haven't started yet - presently, i am doing the ground work and reading before to start i understand sharing the internet is relatively simple and can be done from the GUI
What we would like is slightly like BT Fon or BT Open Zone in the UK: you can hook on a free network but in order to access outside (internet: email, web, ftp, etc) you need to login login would help us monitor fair usage. I imagine something with username and password for each user would do: as we are a few in the same building not everyone is actually paying for the connection and we don't want to end up with rather large excess bills. So the ones who are paying access both files and internet; those who dont just have access to the files on the local server.
Do i need Ubuntu server to set this up? What hardware would be ideal - given we are all far from rich but willing to have a nice setup
It would be great if you could share some knowledge around the topic and eventually provide some tutorial; also any heads-up on the hardware side would be great! (signal booster, etc - there's 3 floors and 3 buildings)
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Oct 10, 2010
I just installed Lucid Lynx Ubuntu on my computer. I love it, but I do not see how to configure my dial-up modem and connect. I'm hoping it's still possible. Here's my hardware.
333mHz Pentium III
Lucid Lynx 10.04 LTS
US-Robotics 56K Faxmodem External
256mb RAM
ISP OmniLEC
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Dec 30, 2009
I have a wired lan at home with 2 XP boxes connecting to a router to a DSL modem. I want to network my laptop, running only fedora os, for file sharing, printing and internet access. I will be using the laptop probably exclusively for creating/maintaining a Drupal-based (LAMP) e-commerce site to replace our old one for our small family business.
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Jan 13, 2010
I tried to setup sharing to connect Ethernet and wireless. I want Ethernet connected to desktop A, and wireless connected to another laptop(B), with my laptop acting as an AP. I set the network settings in Firestarter: Internet for wireless, local network for Ethernet. I want to share Internet from laptop B over the network. Internet won't work from my laptop since it seems to use the wrong interface.(Since the desktop is sharing Internet, although not on Internet usually when connected via Ethernet. And of course DNS/Gateway IPs aren't set for wlan0 since it's acting as an AP.) SMB wouldn't work for desktop A and laptop B: laptop B could detect desktop, but reports error "Path not found".
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Aug 29, 2010
For the last 3 or so hours I have been trying in vain to simply give my mobile phone wifi internet access from my netbook. I have tried to google and follow some howto's and guides, but they're either too old or don't explain it very well. I'm fairly new to use of Linux and of wireless networks, but can handle setting them up in Windows. So basically, having said that, I believe I mostly understand how this whole thing is supposed to work theoretically but I just feel as though I lack the experience to jump the wireless hurdle AND the Linux hurdle at the same time. I have provided some information below.
- Setup is based on Lucid netbook remix install with a Maverick kernel update due to lack of driver support for wireless NIC - I can confirm wireless does work properly for connection purposes
- I followed [URL] and kind of followed [URL however I couldn't even tell how to run Network Manager, even though Synaptic tells me it is installed
- When I ran into problems trying to install ipmasq I found [URL] and followed what the response told me to which allowed me to restart the dnsmasq and the dhcp3-server at least
- I have restarted the entire netbook several times throughout the process.
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Nov 3, 2010
I am trying to establish an adhoc connection in my ubuntu 10.10 and share my cable internet throughout this connection with my Android phone. I have read some guides but I couldn't be successful. (I have another windows mobile, and it couldn't connect too). I have installed Firestarter in order to enable internet sharing. My main Problem is that, no one can obtain IP adress from the adhoc connection, whether Firestarter is active or not. What should I do in order to make the other devices gain IP address from this connection. If I have to set static IP what should I do exactly?
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Apr 1, 2011
I have 2 pcs at home. I dont have a switch so I can connect only one PC at a time to my adsl router/modem for internet access. In the past I had successfully connected the two PCs (NIC to NIC) to each other using the same ethernet cable which was supplied with my dlink adsl modem.
Recently the motherboard of on of my PC went bad so I replaced it with a new one. The problem is when I connect the two using the same Ethernet cable they won't connect. The lights on the Ethernet port won't light up. I can still connect both of them to the adsl router (NIC to Router) (one at a time).
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Mar 11, 2010
My computer is already connected to a 100Mbps LAN. I can use wvdial to connect to internet using a modem when I have my LAN disconnected. Now, I want to share this modem internet to one of the IP addresses available on LAN. Say 10.100.99.56 for example.
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Jan 22, 2010
I just bought a TRENDNET TDM C4000 (=modem/ wiredrouter) and got it working. If I connect my computer with through the ethernet port directly, the internet will work. However, when I try connecting the ends of the ethernet cable on the modem and my wireless router, it's not transmitting. I know I set up the wireless router correctly because it worked with my previous modem. I just need to know how to configure my modem so that it works with my wireless router (D-Link DI-524).
I have a long wired ethernet wire to satisfy my academic needs for the internet at the moment but my mother is not able to surf the internet and it would be more convenient for myself to put the wire back to my desktop and have my laptop browsing wirelessly.
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Jan 28, 2010
Earlier today I decided I wanted to switch back over to ubuntu, my internet was working fine, but as soon as i reformatted to Linux my modem stopped showing any lights under ADSL - TX and RX. and I can't connect to my wireless connection anymore. What should I doooooooo
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Jul 22, 2010
I have a wireless Internet modem (USB) and a LAN Ethernet connection. I can only pick 1 of them to connect to (by disconnecting the other). How can I connect to both at the same time?
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Aug 6, 2010
i'm having problems connecting to the internet unless i manually enter the IP info.
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Jan 1, 2011
I have internet access through 3G/4G USB dongle direct into my Ubuntu 10.04 box. Works great! Now I would like to share this connection out through my Netgear WGR614 wireless (and wired) router. Any clues? I've tried the simple (GUI) instructions using Network Manager, but just can't seem to get it right. Previously, I had DSL and this plugged nicely into the WGR614 and internet and ethernet access was had by all. Now, I'm a bit confused on how to get the sharing (ethernet and wireless) between my Ubuntu box and the wired/wireless network while at the same time getting Internet access to all through the Ubuntu box.
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Sep 10, 2010
I'm not really a newbee in Linux but I am a newbee in networking. I have both a Ubuntu laptop and a Gentoo desktop computer. I have just bought me the MBR1000 Cradlepoint router and it works great with my Verizon USB 760 modem plugged in it. I can now send and receive email on my Ubuntu laptop. I like it.My Gentoo desktop computer is just sitting there with no Internet access because my Verizon modem is no longer plugged into it but plugged into the router instead. Only my laptop now has Internet access. The laptop has an integrated wireless card built in the MB but my desktop has no such capability.
Is there a way (besides buying a wi-fi adapter) to get Internet access on my desktop computer through networking so that the router would give both computers Internet access at the same? My Gentoo desktop does have an ethernet adapter that perhaps I could useThe router has several LAN ports and one WAN port, both unused.
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Jul 7, 2011
Im using WPA with a TKIP pre-shared key...Can a client pc im sharing my key with access my files if im not file sharing? Router config?
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