My host is ubuntu 9.04 and the guest is winxp sp3. I need to use QEMU to monitor the network communication for security researches. But I failed to establish the connection between the host and the guest.
To build a TAP connection, I input commands as the following t.
How should I establish the TAP and Bridge connection in the QEMU?
I have a Gateway laptop running ubuntu 10.04, and just now have a compaq desktop running windows 7, my laptop has wireless internet connection, it's the only way that i can get it in my room. my desktop has only ethernet plugin. My question is, If i plug my laptop up to my desktop using an ethernet cable, can i bridge that connection to get internet from my laptop(using the wireless) to my desktop(using the cable)
View 1 Replies View RelatedFirst of all I have a Ethernet cable from the wall to my desktop then I have a Ethernet cable from my desktop to my laptop. Before I did a fresh install of Ubuntu 11.04 I was using Ubuntu 10.10 and I found a tutorial to make this network bridge work by changing settings in the Devices - Network Tools. I need to make this bridge work again and i totally forgot how and I can't find the tutorial.
View 1 Replies View RelatedHow I can make this "link" with Ubuntu 10.04?
pc 1 == win xp
pc 2 == Ubuntu 10.04
I have an openvpn bridge up and running (ubuntu to ubuntu, both in vmware fusion machines on macs). My problem is that I cannot get a connection faster than ~9mbps even though 20+mbps is available. I've been troubleshooting for a while and have tried many fixes. I just now did ethtool tap0 and I think maybe I found it. It says the link is 10mbps. I tried to change it with:
sudo ethtool -s tap0 speed 100
but it says ethtool cant change speed on tap0. How can i define the link speed of tap0?
just wondering if I could get a hand with bridging my eth0 and wlan0 connection. I'm using Ubuntu 11.04 if that helps at all.
View 1 Replies View RelatedI want to connect my dataone broadband connection in bridge mode in fedora 7. As i am currently using a bridge connection through this modem (smartAX MT882) in win XP, i want a bridge connection in fedora 7 too to access the internet from linux. I have gone through some forums discussing this issue. somewhere i have found the option "adsl - setup" and tried it in my fedora 7. But it is showing the message "adsl- command not found" on this issue. I need a detail step by step procedure for brigde connection using datone in fedora 7.
View 3 Replies View Related"I am new to Linux. Could you please guide me how to make ADSL bridge connection. I have tried to make connection using Network manager. But, it some times works and some times doesn't works."
View 1 Replies View RelatedI have installed opensuse 11.4 xen on a HP ML115 G5 AMD Opteron server, which previously hosted a fully working opensuse 11.3 xen. The problem seems to be that br0 is not showing as a bridge device in network settings. When I first installed opensuse 11.4 networking was available via dhcp, I then installed the xen tools and answered the prompt to create a bridge, it was only when I re-booted the system that I lost my network connection.
Going back into network settings I compared the settings to an existing working opensuse 11.3 xen install that I have and noticed that br0 is not showing as a bridge device in network settings so cannot be selected, in fact no bridged devices are shown.
I have a bridged network setup ifconfig -a gives following output
Code:
br0 Link encap:Ethernet HWaddr 00:26:b9:82:42:38
inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::226:b9ff:fe82:4238/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:150779 errors:0 dropped:0 overruns:0 frame:0
[Code]...
3) What are these vmnet1,vmnet2,vmnet3,vmne4 which I see above. I used kvm and virt-manager to create a bridged setup.
Actually i'm doing an ingenior training in SAGEM company, well i'm trying to develop an application which is able ti disturb the IP Network,my idea was is to mount 2 Network Interface Card (NIC) and make a bridge to pass the IP flow and to exploit the firewall Netfilter using iptables command.The application has to import a text file containing a binary array like this one:
0 1 0 : 0 corresponds to iptables -p ip ACCEPT
1 1 1 : 1 corresponds to iptables -p ip DROP
0 0 1
==> So the expected result is to have 5 ip datagrams dropped
My idea was: if 0 --> iptables -A FORWARD -p ip -m limit --limit-burst 1 -j ACCEPT
if 1 --> iptables -A FORWARD -p ip -m limit --limit-burst 1 -j DROP
The problem was: After executing the application and parsing the text file,
with iptables -L -v: i have
Code:
-A FORWARD -p ip -m limit --limit-burst 1 -j ACCEPT
-A FORWARD -p ip -m limit --limit-burst 1 -j DROP
-A FORWARD -p ip -m limit --limit-burst 1 -j ACCEPT
which is logic, but when i sniff with wireshark i find more packets are dropped(6,7 or 8 are dropped), like i had put more DROP rules. and sometimes i found the exact value(usually 5 dropped).
I want to set up a bridge using bridge-utils within /etc/network/interfaces like is shown here in this guide: [URL] The problem is that, at the same time, I want eth0 to have a specific static IP address. Right now I have a configuration for eth0. This guide tells me that I should not configure eth0 outside of the br0 configuration.
View 3 Replies View RelatedI have an adsl modem acting as a bridge to my router my setup was working well for more than year now , but then the internet went slow . I set the modem back to PPPoE the problem was with the DNS server of the ISP so using ifup i set the dns t 8.8.8.8 (google) the connection is back , but when i set the modem back as a bridge slow internet does the router know that my dns is 8.8.8.8 or i should set the dns on the router ? I can't see an option to set the dns on the router ( i just enter my username and password from the isp to use PPPoE mode ) by the way i called the isp support they kept telling me to restart , i told them i did but i never restarted my pc . I'm sure if i tell them i'm running linux they will blame the os !
View 2 Replies View RelatedPc 1 : netbook with an usb wifi antenna spotted on a free wifi hotspot
Pc 2 : same model netbook that can't access internet
What I need : Share the wifi connection by the 2 internal WLAN on ubuntu by network-manager
I have changed my sshd banner in /etc/motd code...
However, I would also like to change the banner that someone sees if they attempt to use another method of connecting to my ssh server (telnet, for example). Currently, this is what happens code...
Where do I edit the telnet/ssh banner, so it isn't so easy to fingerprint my os/ssh version simply by using something such as telnet?
Is there a way to use the firewall to essentially lock certain programs like firefox and transmission to my vpn connection-so that in the event that my vpn connection goes down these programs do not use my default ISP Internet connection.
View 1 Replies View RelatedI was hoping to set up a Kubuntu 10.04 Chroot on a PC with no internet access (I only have dialup anyway, not Broadband). All the information I have been able to find refers to downloading debootstrap in order to do this.I purchased a set of DVDs with all of the Ubuntu packages on them and created a single repository of them on my harddrive.Is there some way that I can create the Chroot using the packages on my hard drive without having to access the internet to download stuff as I do it?
View 6 Replies View RelatedI'd like to buy some stuff from the Software Center but I don't see how to confirm a valid certificate or see any indication of a secure connection on the screen where I enter my credit card info. Of course, I'm sure the page IS secure because who would design it otherwise (especially considering how our patron made his first fortune), and I could sniff out the network connection, but I don't see any information provided to the end user.
It seems like it could open up Canonical to all sorts of legal issues to not have security info and a privacy policy easily available in the payment section of the USC. Maybe it's there and I've missed it somehow. maybe it is on the next page, but I didn't press the "submit" button.
Thought about posting in the Networking board, but I believe this is a much more security-oriented thread. So let's say I bring my computer to a public place, say a library with one open, public, shared wireless network. I connect to that network. Let's assume that everyone else who's connected is using Windows. Can they see my computer (through Network Manager or other software) and attack it (SYN flood or something)? Or does it depend on the network settings?
View 9 Replies View RelatedIs my ssl connection secure if I'm going through a proxy. Is it possible to craft a malicious proxy to steal/crack authentication?
View 2 Replies View Relatedon my linux server i have many websites, before i use this command
netstat -anpl|grep :80|awk {'print $5'}|cut -d":" -f1|sort|uniq -c|sort -n
to see all the ips with many connection but the problem is is show me all the ips from all the websites from the server, can be another way to show me all the ips just from my website ?
I will be hiring Linux freelancers very soon to do some work on my Linux Centos 5 machine. And I need a way to see what he's doing on my computer over ssh, now I don't mean me reading the logs, I meaning seeing what he's doing in realtime (kind of like vnc, but except the freelancer will only use ssh to do his work and not on the desktop environment.)
View 10 Replies View RelatedSince important information like pass-phrases is sent via a Bluetooth link, I wonder how secure this is. I think it must be quite a weak point.
View 3 Replies View RelatedI'm having a web server running with ssl version 0.9.8 on Ubuntu 8.0.4. Server is having a valid certificate issued by authorized CA. In the begining client and server able to communicate (beyond handshake) successfully. However, after a couple of days all of the active connections go haywire.
View 3 Replies View RelatedI am running ubuntu 10.10. I recently enabled the firewall and installed Firestarter to configure it. Bad decision apparently. I can't connect to the internet using Firefox unless I first stop the firewall using Firestarter. After I do that, Firefox connects to the internet just fine.
If I uninstall Firestarter, will the ubuntu firewall function as it did originally, before I configured it? Or will it continue to function the way it does right now, which doesn't allow me to connect to the internet?
I'm running an SFPT server which my clients logon to using an FTP client. at the moment each client has a user name and password.
Thus far to improve security I've disabled root login but an looking for futrhrt ways to protect it from attack, having researched using google some of the security features suggested prevent the FPT clients from connecting.
Questions:
1- what further things can i do to secure my server that still allows it to be usable for FTP clients?
2- specifically is it possible to use non login pre-share key authentication?
How i set up the server is shown here: [url]
What is happening when I log in to my Ubuntu server machine via ssh and putty. trying to understand everything, primarily securing my server.
I have specified the ssh server to listen on port 5525, and can login without a problem.
When I look at the logs though it says I connected from xxx.xx.xx.xx on port 53602.
What is happening here and why is the logged connection a different port to the one specified in the config file?
I have several CS servers running on ubuntu server, and sometimes someone is trying to brute server's RCON password with the program called HLBrute. I've found the following rules to prevent such hack attacks, but they don't work What can be wrong in these rules?
Quote:
iptables -A INPUT -p udp -m multiport --dport 26000:30000 -m string --algo kmp --string "HLBrute" -m limit --limit 1/hour --limit-burst 5 -j LOG --log-prefix " HLBrute_Ataka "
iptables -A INPUT -p udp -m multiport --dport 26000:30000 -m string --algo kmp --string "HLBrute" -j DROP
I open this thread after an unsuccessful long search over the Web. Essentially what I want is to block the outgoing connection of a program. All I know about this program is its name and so I don't have any information regarding the ports it utilizes or the address it may contact.
View 9 Replies View RelatedI was working on my desktop under Ubuntu 9.10 when I got a message in the the upper right telling me that my Remote Desktop Connection had been activated. I don't know who it was, but they proceeded to open up a terminal and start typing a bunch of stuff. This scared the living @#$^ out of me, so I didn't really pay attention to what he was doing and immediately dove for the reset button. I disconnected my network from the web and found that RDC was NOT password protected.
Now, I probably did this a little while ago while I was playing around with it, but I also set up an account with dyndns.org. Would this possibly increase the number of attacks on my network? Just in case, I have removed my listing. Also, would any of this incident be logged somewhere? How/Where would I look to see if I'm being poked and prodded for another security hole?