Ubuntu Security :: Can't Connect To Router Through UFW?
Feb 14, 2010
I have problems connecting to several things while ufw is enabled, with the most important beeing my router(10.0.0.1) and KGpg key upload. I tried to allow all incoming traffic from 10.0.0.1 but it didn't help. With ufw disabled i can connect to the routerI use wicd and wicd-client for connection and the "cant connect to access point" errorBelow are the output of ufw status numbered and portsentry(dunno if its needed)
Code:
To Action From
-- ------ ----
[code]....
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Nov 6, 2009
I have a desktop PC running Ubuntu 9.10 and Windows 7, and a Eee PC 701 laptop running EasyPeasy Ubuntu 9.04. I'd like to connect the desktop to the laptop with a wired connection (eth0), then the laptop to my ADSL router using wireless (ath0).
I have a crossover ethernet cable (I bought on ebay). I have set up my laptop with a static IP address on my LAN and it uses OpenDNS.
I have added this to /etc/sysctl.conf on the laptop:
net.ipv4.ip_forward=1
Then I tried this on the laptop:
sudo iptables --table nat --append POSTROUTING --out-interface ath0 -j MASQUERADE
sudo iptables --append FORWARD --in-interface eth0 -j ACCEPT
This is a variation on what I found on other sites describing how to set up a router. I don't understand iptables very well, but I gather that the above two lines should set up forwarding so that traffic from my router to the laptop will be forwarded to the desktop, and vice versa.
But this doesn't work. The connection doesn't even establish between the laptop and the desktop.
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Nov 11, 2010
As it stands I have a small home network operating behind my modem/router. Some of the ports on this are forwarded to my PS3 for gaming but I was looking at forward some for my file server.
At the moment I've forwarded port xxx22 to port 22 on my server for SSH for instance. ANd similarly 21 for FTP (although it doesnt seem to want to connect for any more than a few seconds using that). What I was thinking of doing was placing a small website for a handful of ppl to use on the server too and port forward again - xxx80 to 80. It works just fine but I'm a little concerned on the security front.
As I've moved the port to something different from the outside world I'm presuming I will have already cut the potential for malicious folks to wander in but is there anything else I should be doing? At the moment there's no firewall operating on the server, usually as its hidden behind the modem/router. But if I open this thign up more permanently what should I be doing? I've read a few articles on it but I'm always left with the overwhelming thought of "Thats if theres no firewall in my router" as they just seem to do the same.
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Apr 6, 2011
I am trying to setup a dhcp server for my internal network. I have two NICs, a modem, and a wireless router. I have my server connected directly to my modem which is providing me with Internet access on eth1 and is working fine. I have dhcp and dns setup on eth0 which is connected to my router. The router shows that it is connected to the Internet but when the router gives a client computer an IP address, the client is unable to connect to the Internet but can connect to the router. I will post my configuration files below with my current configuration.
[Code]....
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Aug 1, 2010
My son lost his USB Wireless stick for his Computer. I had thought I heard that if you had a second wireless router, you could use it somehow to detect the wireless router you have already set up in your home (like using a wireless card)? Is this what Ad-Hoc is? Either way, can this be done and if so how? I use a WRT54Gx2 Lynksys router and have a TRENDNET TEW-432BRP wireless router and also a spare D-link DI-514. I use ubuntu 10.04, and also wanted to know if I connected one of the router to his on the LAn port could he connect msaybe through an Ad-Hoc on my local computer here? He uses XP on his. I'm a newbie to linux and networking in general.
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Oct 5, 2010
I've read that using your computer behind a router is a must for security because of the NAT+SPI firewall so naturally I became interested in getting one. The thing is, I don't need the other features routers have because I don't do wireless, & I only use one computer. So do I really need one? Do the security benefit(s) gained from using a router warrant spending $50+?? Wouldn't using UFW with default deny rule offer the same level of protection?
Also I want to use my Playstation3 online. What security risks will I be taking if I connect it straight to my modem, instead of through a router?
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May 18, 2010
the connection via wireless lan can easily be established under ubuntu 10.4, but sometimes dhcp fails to get an ip address. is there a way to perform an action (=run a shell script) every time the connection is established? then i could get the ip manually
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Feb 16, 2009
This is my basic setup:
[URL]
I don't know how to get the wireless router to connect to the other wireless router so I can use internet on my computer. How do I achieve this wireless connection?
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Feb 5, 2010
My problem is little different then what I've seen here. I get the same message after inputting network name and password. I click connect and it just pops up again I don't get it. I'm running Ubuntu 8.10 for Ppc (PS3) I get no internet connection what so ever just the same message. The message I get is " authentication required by wireless network " What do I need to do to connect wireless to my router with my PS3 using Ubuntu 8.10? It does connect with a Ethernet Wire. I am new with Linux.
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Feb 16, 2010
I have been experiencing slight problems while attempting to connect to the internet via a wireless router. I can connect to my router perfectly fine on Vista and I could connect to my friends router while I was in Ubuntu, but I can't connect to my router while on Ubuntu. I've been entering the same code that will work when I'm in Vista, but it wont work while in Ubuntu.
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Jul 1, 2010
I am not able to get wireless internet working on Ubuntu 10.04. I have a Wireless PCI card, Netgear WG311v2.I can't connect to the router, even though I downloaded the Windows drivers using Ndiswrapper.
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Sep 27, 2010
I just installed Ubuntu 10.04 on one of my computers and the only way I can connect to the internet with it is through a wire. I have a wireless router and I want to know how I can use the internet wirelessly on that machine. The router is set up correctly because I am on the internet on my laptop (its a mac with OS X) and it is not connected by a wire.I also want to know if Verizon DSL works with Ubuntu.
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Jul 16, 2011
Just installed Xubuntu 10.04(old HP POS i threw together right quick) and can't seem to get my wireless (card > bridge) to connect to the router.. Havn't been around 'nix for YEARS and I mean YEARS, early 90s!!!! I'm back now and want to get in it again... Now my card is all good, lspci picks it up and have the name of my "interface" so what's is wrong?? Sorry for the EXTREME n00b.
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Nov 10, 2010
I have recently been the victim of identify theft and have coincidentally noticed that my router has been under attack for the past few days. I've been monitoring the log on my router (a D-Link DI-624+A) and suddenly while I was on Skype, my wireless connection was lost. I reconnected and found that the router's log had been erased. It appears from the log that the hacker has so far been unsuccessful. I have already done a 'whois' on several of the IPs this hacker has been using and have notified the respective ISPs.
Is it possible to remotely delete a router log?
Here's an example of my log before and after the delete:
Code:
Wed Nov 10 18:00:24 2010 Unrecognized attempt blocked from 221.136.83.1:40245 to xxx.xxx.xxx.xxx TCP:8080
Wed Nov 10 18:08:24 2010 Unrecognized attempt blocked from 60.173.26.168:6000 to xxx.xxx.xxx.xxx TCP:9415
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Feb 15, 2011
I want to have a firewall that is connected to my modem and router and have it function as just a firewall no dhcp no routing is that possible?
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Apr 1, 2011
Rather than use pfsense, etc I decided to create my own router/proxy etc based on an atom base with 2 nics.Proxy/routing/dns/etc all working fine, I now though want to lockdown the fw rules.ETH1 is the WAN NICETH2 is the LAN NICI'm guessing i want to allow anything out of ETH1, but only allow incoming to ETH1 when its established or related... What about ETH2 though? Any ideas pls? Am used to configuring iptables on single nic, certainly not a router.
Code:
Chain INPUT (policy ACCEPT 18535 packets, 10M bytes)
pkts bytes target prot opt in out source destination
[code]....
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Jan 30, 2010
I want to show you this scheme:MyPC -> router -> internet <- router <- Mom'spc I want to connect from my pc to my mom's pc using ssh. The first router doesn't represent a problem, but my mom's router does. Our IPs are both dynamic (anyway, I can easyly know them) and I have opened the port (TCP/UDP) 2100 on the router in order to open a gateway on mom's pc.The firewall is not enabled on the router, nor on mom's pc.
Granted all this, now I should be able to connect to that computer using ssh:ssh user@ip -p 2100 But I can't, I always get a "connection refused".if I do it on my intranet, I can connect without any problem (to others computers, of course, not mom's) What's the reason because I always get a connection refused?
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Feb 6, 2010
I have a router with 2 IBM Thinkpads connected. One Thinkpad is running Ubuntu, and the other is running XP.
They connect to the router with no problems.
I installed Ubuntu on a Sharp Moebius laptop and plugged in the network cable.
NOTHING.
I have tried pinging the laptop; nothing.
I am not sure where the problem is, because my Thinkpads have no problems connecting to the router, with both Ubuntu and XP
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Apr 22, 2010
my LAN just suddenly stopped working. we had a power outage, and it just stopped. it will still recognize the network, but it wont connect. i was experimenting with setting up a web server (trying to set it up on the standard distro). i know its not the network card (on board) because i can put in my pci card and it still wont connect. it will connect when in the live environment. i thought that maybe it had updated, so i tried to boot from a different (older) kernel. that still didn't help.
i stopped apache. i was experimenting with portforwarding at the time (i had everything else working on my server), but i could not get it to work. after this happened, i restored the original settings on my router. i had applied the settings only a day before the power outage. everything still works on another computer on the network (also running linux). (all computers run 9.10) its almost like my router won't assign me an ip address.
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Jun 23, 2010
I have a new belkin N1 router which I tested in somebody else's flat. It worked fine. When I got home I reset it by pushing a paperclip in the hole for 10+ seconds to erase this flat's internet connection settings (username and password and stuff). After this I plugged it the computer and tried to connect to it (wired connection) using 192.168.2.1 (this is correct for that router, it is not 192.168.0.1). But the browser says it is offline and cannot connect. The lights of the router cycle, the "modem router" light blinks continuously and the others briefly come on and go off again, every few seconds. I tried resetting it again, several times, leaving it off for a few hours, leaving it on for a few hours, etc.
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Sep 5, 2010
I recently just upgraded my operating system to Ubuntu 10.04 LTS and I can't seem to get my wireless card to connect to our new Verizon Actiontec router. I am using an Encore Electronics 802.11n Wireless USB Adapter (model: ENUWI-N), which had worked with an earlier version of Ubuntu and our old router. The adapter recognizes the SSID of the new router but will not connect with the correct WEP key or even with the encryption turned off. I have tried deleting the wireless profiles and manually re-creating them and still no dice. I have also gone to the website of the chipset manufacturer and found the latest drivers (RT2870USB(RT2870/RT2770)) for the adapter, which, according to the Synaptic Package Manager, I do not currently have installed.
Where do I go from here? Do I need to install the new drivers, and if so how do I do that?
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Oct 23, 2010
I wanted to try Ubuntu again but have gone wayback to an old 8.10 disk because I couldn't get 10.10 to work. The install with 8.10 went fine but the internet will not connect. The network manager shows eth0 grayed out and when going in to manage the connection it says 'never'. I'm using Vista with a broadband modem connected to a netgear router.
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Nov 1, 2010
Im trying to setup Ubuntu for my buddy. After talking it up for ages of course i get a problem ive never seen be for . He is running 10.10 (or whatever the newest is lol) and when running windows it hooks up to the internet just fine through the router. however in ubuntu it will only connect when i plug it directly into the modem. Route gives no output. Kinda weird. router is Linksys Wireless G Broadband Router. WRT54G.I dont want him running back to windows before he even gets into it.
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Nov 20, 2010
new to ubuntu and having difficultly connecting to my wireless router.It can see the router but will not connect keeps asking for password.usb adapter is working 100% as i can connect with it using xp 64bit.
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Feb 3, 2011
It says my routor's name and signal strength but when I try to connect it tries for a while and then fails.
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Mar 15, 2011
I think I have unique problem. I have a d-link DWL G510 rev c.(Austrailian) WiFi card in my pc which is detected as
Quote:
Network controller [0280]: RaLink RT2561/RT61 rev B 802.11g [1814:0302] in lspci -nn.
iwconfig shows:
Quote:
lo no wireless extensions.
eth0 no wireless extensions.
wlan0 IEEE 802.11bg ESSIDff/any
Mode:Managed Access Point: Not-Associated Tx-Power=6 dBm
Retry long limit:7 RTS thrff Fragment thrff
Power Managementff
ppp0 no wireless extensions.
Now sometimes it detects my wifi router and shows its ssid in nm-applet. but when I try to connect, it tries for 3 or 4 minutes and then fails. for most of time it even does not finds my router.
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Mar 17, 2011
I have installed ubuntu 10.10 and am really happy. I want to sort the wireless conection out now. I have been through this forum for hours today and can't get it working. I have a Broadcom wireless card, which seems to be working fine, but I am not 100% convinced.I have attached the output of some of the commands that I have seen referred to on here.
I am using the wired connection on the same router, so the router connects fine.I click on the network icon and I see the skyNNNN router in the list. I have tried connecting to it and it asks me for my password, which I provide then nothing happens until it asks me again.I have removed the security from the router and I then see the same skyNNNN router without a
lock icon. I try to connect and it still fails.I am not using an access list on the router, so there is no issue with the mac address.
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Mar 30, 2011
After reinstall Ubuntu 10.04 LTS didn't recognize my ADSL router Billion 400 G.The Ethernet 1 led is off after booting.Search on web for help on this but no good results.You good people now are my last resort.I tried boot in live CD and result is the some.Check with sudo lshw.
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Apr 14, 2011
I have been using pppoe connect to Internet,now I want my notebook get on line,I bought a wireless router but Ubuntu(64-bite) can't connect to Internet through the wireless router.pppoeconf said that found eth0 and vboxnet0,but search concentrator failed and pppoeconf exited.How can I fix it.
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May 19, 2011
I'm running Ubuntu 10.04LTS 64bit. The desktop running it does not connect to my router or the internet. My mac laptop does. When I installed windows on this desktop, it too could connect. But after reinstalling ubuntu, I cannot. I tried upgrading to the latest ubuntu, but that just bricks my computer. Here is my ifconfig:
Code:
~$ ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:1d:09:95:39:76
inet6 addr: fe80::21d:9ff:fe95:3976/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1492 Metric:1
[Code]....
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