Ubuntu Networking :: Can't Get Trough Firewall/VPN
Nov 21, 2010
On the office we have a Firewall/VPN infrastructure. Everybody connects to internet trough an Access Point (Lynksys RWT120N), which, in turn, connects to a WatchWard/Firebox red box. I suppose this is the equipment that does the VPN stuff. Finally, the red box connects to a DSL modem from our ISP.The problem is: Everybody on the office can connect to the AP and surf the internet without any issues, excepting me when I connect with ubuntu 10.10. I have windows on the same machine and I can access the internet without problems.
What I have seen so far is that Network Manager associates with the AP, gets what I would consider all the expected information from DHCP, but internet connectivity is none.For "expected information from DHCP" i mean: IP address, gateway, and DNS.I can ping my assigned IP address, the gateway and even other machines in the same network. I cannot ping the DNS or other external IP addresses.
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Jul 22, 2010
i know it all sounds weard but ive been searching google so much now.. look the setup is kinda straight forward. We got a test server for websites. This server has lamp server configured. Now i have a Website in the apache www folder. From here on everything works fine in http://localhost or 127.0.1.1 etc etc. also i have configured virtualhosts. This so we can have a live enviroment but its actually a test enviroment.
Now i try to connect trough the lannetwork! so i goto my windows client and hit in the browser :http://(serverip+port) and also tried http://(serverip) When i do this i get a 403 forbiddin acces. I solved that problem by deleted a line in the apache2.conf wot was called : virtualHost xxx.xxx.xxx.xx: xx
Now Hes loading the page but says he cant connect to 127.0.1.1 Any1 knows a solution? (sorry for my bad grammer btw )
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Nov 9, 2010
I'm quite new to ssh tunneling but I now want to make one of my machines at home accessible to my lan network here. I used the following command to make it available trough 127.0.0.1:5555(lo interface):
ssh -L 5555:192.168.0.15:80 me@xx.xx.xx.xx -N
now I want to make it available to eth0 on 192.168.1.40:5555 How do I do this?
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Aug 13, 2010
I have two NIC, one is ethernet and second is via modem. On the eth0, most of no standard ports are blocked, so I need to connect to specified port on some IP, through ppp0 (modem), to use ssh connection on non standard port to that IP. For other ports on that IP and all other IPs I want to use eth0.
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May 18, 2010
I am learning to setup firewall in my home for that i have selected four system(sys1,sys2....sys4) for testing .I have configured sys2 to act as a firewall with two NIC. sys3 and sys4 are inside the firewall . sys1 is not connected to firewall for testing purpose.
the IP assignments are follows :
sys1 : ( fedora, not connected to firewall i am thinking, But i am not sure )
IP : 192.168.2.1 ,
gateway : blank
dns1 : blank
dns2 : blank
sys2 firewall ,IPTABLES )
code....
what happened is that sys1(not connected to firewall) can ssh to sys4(connected,inside firewall),since the rules are written not to ssh form sys1 to sys4..
then I came to know whatever the request I give, It directly goes as sys1 --> sys4. Not as sys1-----> sys2(firewall)---> sys4 .and the firewall is not filtering and processing anything for both inbound and outbound (i think it's my mistake some where). the requests are directly going inside without firewall.
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Aug 16, 2011
Maybe the most stupid question you guys ever heard, but i do not find the solution.Now that i have acces on the netbook i would like to share a folder on my desktopcomputer so i can acces it with the netbook when im in the bedroom.(moviefolder)But how do i share a folder in Fedora 15?
Username and password are the same on desktopcomputer and netbook.
desktop computer is named koen-pc
netbook is named koen-net
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Jun 15, 2011
So I need to make an IPsec vpn. I've been told to use Shrew Soft. But I'm completely lost on where to begin. I've gone trough the documentation and stuff but I have no idea what to do next.
I can't find anything on the site how to install or configure the shrewsoft shizzle. The only thing I could use is something about ipsec-tools because all the rest is using a graphical interface (which ofc I'm not seeing how I'm using a server edition).
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Jul 10, 2010
What if someone tampered with some important security updates, and suddenly you get a rootkit instead?
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Nov 30, 2010
seems that the secret way to manage sourceforge.net files without pain and blood is not revealed yet!I uploaded some files in my sourceforge project named blackwar .I want to connect to my projects folder in sourceforge.net using filezilla or gftp.I want to see my files there and manage them.
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Dec 28, 2010
I have Lenovo SL500 with ubuntu 10.10. Also i have installed latest GeForce 9300M GS drivers from NVIDIA site. NVTV is also installed. When i want to connect to LG 32LE4500 trough HDMI i get no singnal message. I tried to configure with nvidia-settings but no positive results. Also i have tried with bigger SAMSUNG screen but no results... am i doing something wrong? Or, is this problem with NVIDIA (or ubuntu) HDMI support. If it is, where can i find information when will be bigger support for HDMI with NVIDIA and ubuntu?
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Aug 10, 2010
i want to access to my samba shares index (or contents) trough http. something like this: [URL] i read something about aliases...i wrote this in the httpd.conf:
[Code]...
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Mar 25, 2011
I suspect this is an initial configuration bug. All firewall logs seem to be going to all
three files. That causes a lot of clutter in the log files, and makes it difficult to see whether there are any serious problems being logged.
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May 27, 2011
I'm trying to build firewall on Debian with 'Firewall Builder'. But it won't let me compile and run unless one interface is set as management. There are two interfaces on my computer: 'eth0' and 'lo'
I don't want to be able to configure firewall remotely, so could I use 'lo' as 'management interface'?
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Sep 26, 2010
i connect to internet with the connection (with Name: DSL Connection 1) that made by myself. now i wanna use the firestarter but i have a problem.
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May 9, 2011
Can we use iptables as firewall instead of Juniper firewall
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Feb 9, 2010
I want to setup a router with firewall on ubuntu box that will connect windows pcs one serving as outside source and one serving as inside target.
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Mar 13, 2010
I am using ubuntu 9.10. Configuring my firewall using guarddog. I have setup a rule to allow traffic OUT on port 7078 UDP, and just because i'm having problems i added an IN rule.
# Create the filter chains
# Create chain to filter traffic going from 'Internet' to 'Local'
ipchains -N f0to1
[code]....
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Oct 12, 2010
I have installed Ubuntu 10.04 Server on an older desktop with the intent of making it into a firewall box. What I would like to do is hook one nic into the modem, and the other nic into my router. I'm not sure if I want to setup the 2 nics as bridged.
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Apr 6, 2011
I am wanting to build myself a Linux based firewall and network switch but I am not entirely sure where to start. I would like to point out that I am aware that it would be easier and quicker to just buy a switch and use that, but this is an intellectual exercise.
What I want to do is have a NIC which has the internet coming in. The traffic is then passed through the firewall program (I think IP tables is what I should be using?).
Now my main issue is that I will have quite a few Network Interfaces to manage. The machine could easily assign IPs by DHCP and act as the DNS server but what would I need to use to share the internet connection to all the NICs? There will be at least 4 interfaces, but possibly up to 12.
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Apr 23, 2011
im looking for a good firewall application.
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Jun 13, 2011
I have got a centos 5.5 box with 2 interface (WAN & LAN) and trying to configure firewall so that LAN user can browse [URL]...
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Jan 30, 2011
I have two webservers in differents machines (192.168.1.10 and 192.168.1.20) that hosts two differents domains (www.test1.com and www.test2.com).
I have a machine that acts like firewall with two NICs one to the ADSL router and another to the internal net where the two servers are.
There is a way to route to one or another machine based on the domain name? I've been reading about how to do this with iptables and DNAT but I can't find a propper solution that use domain name as destination instead ip address.
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Feb 6, 2010
In my firewall I have these ports open:
21
143
110
[code]...
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Mar 28, 2010
I have tried various rules, like opening port 53 for the DNS with little success. I finally figured that you need to set the source port to 53 and NOT the destination port.However, I have been unable to figure out what ports apt-get requires. The only way I get it to work is to accept everything in iptables.
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Apr 23, 2010
I have seen tutorials on setting up a secured firewall/router/gateway using ubuntu server as the platform. However, I am wondering if anyone has had experience with using an aircard (wireless broadband card via usb) to set up a router.
Which card do you recommend? Any precautions? Any specific code already written to automatically recognize mobile broadband cards and restart the connection if it goes stale?
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Aug 10, 2010
here's my delema, there is a server on a network protected by a overly restrictive firewall. I can't connect to the server.
I was thinking, does a program exist where the server would connect to another server outside the firewall, then wait for commands? This way there is no port forwarding required. The only program I know that does this is LogMeIn. If you check the logs it does use SSH, and thats even when I blocked the port. Since LogMeIn isn't what I was looking for (Windows Only, full screen capture instead of command line), does an alternative exist?
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Nov 7, 2010
I have OpenVPN running on my Ubuntu Server just fine. I can connect over the Internet and access all my resources on the LAN via bridged mode perfectly. My server only has one LAN card and sits behind my router, which means it has a private IP address of 10.1.1.2....Which brings me to my question. I want to open up access to my friends via OpenVPN, but I don't want them to be able to access other machines on my LAN (e.g. 10.1.1.20). However, I do want them to be able to talk to each other and pass broadcasts (old LAN games), as well as my laptop (let's say 10.1.1.7).I've tried using iptables to block traffic to the LAN (such as .20), to no avail. I've been reading up and it seems as though iptables won't even filter the traffic, as it's passed at a lower layer. Is this true? If so, what do you recommend I do in order to prevent my buddies from accessing the rest of my LAN while siumultaneously allowing broadcasts pass for some very old Windows LAN games (we're talking Windows 9.
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Jan 28, 2011
post the "perfect" tutorial for setting up a router and firewall for Ubuntu 10.10 Server 64-bit? I'm kind of a n00b when it comes to Linux, so I get really confused with some things, I have seen things on the ubuntu wiki about this... but it really confuses me =
I'm trying to setup my ubuntu sys as a router and firewall... Internet -> Ubuntu (Router) -> Switch (no DHCP on it) -> Computers I've already setup bind and dhcp3 and got those working perfectly... I've also setup Squid3 and Dansguardian for content filtering (blocking ads and such) and got them working too... I want to set it all up to be transparent, and allow the system itself to function as a powerful firewall router, giving absolutely NO issues to client computers connected, and no speed reduction at all.... I want to setup the firewall to allow all outgoing connections, but block everything incoming (stealth the network)... Forcing all http/s traffic to pass through dansguardian, then to squid...
But am very confused on how to pull this off... The system is running Ubuntu 10.10 Server 64-bit, with 4 GB of RAM, 320 GB SSD, and two 1Gb NIC cards... Sorry if I'm not very clear, I do speak english perfectly, but just kinda new to the "Linux world", I was using SONICWALL but that's getting a little too costly to my network and wanna do a free alternative... Something completely CUSTOM, not using some network security distro.
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Feb 23, 2011
Please review my webmin Linux firewall. This is a squid proxy / Firewall / Router. Everything works fine until I change that last line to reject or drop all. Then the traffic behind the firewall that is trying to reach the internet gets borked. I can only assume that something is killing the connections to squid. But everything looks right to me. Here is my prerouting. (please ignore the green box) The red box is the action to be taken following the given rule. But I don't think the problem is in prerouting.
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Feb 24, 2011
I Installed a game server on my ubuntu desktop which is on port 7777. I can join the gameserver without any problems on my local network but when I'm trying to join using my external IP address its not working.
This is what I did:I Forwarded my port inside my router but it still didn't work.
I Removed UFW from my ubuntu machine
I Tried portforwarding with an other machine (iMac) and it's working there
Is there any Security on Ubuntu Desktop that's blocking my gameserver
I Got 2 Network cards in my Ubuntu PC
1. Is A Ethernet card that I use to connect my iMac to the Ubuntu PC (Internet Sharing on my iMac) For fast file transfers.
2. Is A WLAN card that I use to connect my Ubuntu PC to our network.
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