So I am looking to modify my network cards MTU (for some testing purposes), and I only know how to do it it Windows (via command prompt ping command with special flags) and not in Ubuntu.
Any easy way to figure out proper MTU numbers in Ubuntu?
I have a small pc running fedora 8 with iptables and 2 network cards for routing/firewall and secondary DNS.For some time I've been alerted by the network guys that this machine was generating some alerts. The real network IP address keeps being assigned to the other interface, intended for LAN only (10.0.0.1/24).I've already changed the PC, installed a more recent operating system, replaced the 2 network cards and the problem persists. I have another pc running the same services (except DNS) in a very simillar way and no alert logs from that one.onder if it is some configuration issue on my startup firewall script.I've also installed arpwatch and I could confirm this IP and physical address issue:
Arpwatch output:
hostname: my.host.name
ip address: my.ip.address
[code]....
I have installed CentOs 5.4 for Snort sensor , on the location where i intend to place the Snort sensor to listen for internal firewall leg (LAN) the switch doesn't support port mirror so i would like to create with 2 nic's bridge and pass trough the firewall internal leg my question how do i set such configuration.
View 2 Replies View RelatedI have installed slackware 13.1 64-bit version and can not recognize network cards.I'm with laptop acer aspire 7540g.Wireless card is atheros ar5b93.Ethernet card is Broadcom NetLink � Gigabit Ethernet.
View 16 Replies View RelatedI've got two NICs connected to two different routers, and on different subnets of course. Each is set for static IP. But somehow I must have mixed up the connections at some point, so the NICs don't always have the IP addresses I expect. I think there may also be a mixup with different ways of setting the network addresses. When I click the Network Icon on the Desktop, I see that each NIC has both addresses as options. The /etc/network/interfaces file has some information about eth0, but all commented out, so there must be another place the addresses get set. And I just discovered that eth0 and eth1 aren't physical but virtual. I guess eth0 is the first one that is set.
View 2 Replies View RelatedI'm new to Ubuntu - I've decided to give Ubuntu Studio a go as an alternative to Windows. However, after installing it, neither of my network cards work. I have a Intel Pro Wireless 3945ABG wireless card, and a Broadcom Netlink Gigabit Wired card. Neither work, And I'm not sure how to. I've tried searching, and have come up with the .tgz file here, but I have no idea what to do with it I'm concentrating on the wireless card for the moment, seeing as that will be the main one I use.
View 4 Replies View RelatedI'm running xubuntu 10.04 LTS (upgraded from 8.04 LTS) on an old low power sempron machine as an always on 'internet machine' i.e. it does all my downloading email etc. and up until yesterday it has always performed flawlessly. Yesterday wasn't its fault, it was a BTI network problem that took out my internet service but while talking to tech support I realized that this machine has lost all ways to control the network cards. Network-manager and network-manager-gnome are installed according to synaptic but they have no menu or notification appearance. I've tried reinstalling them to no avail.
View 8 Replies View RelatedOk, so I've gotten tired of my router, and I've decided to make my own using IPFire as the OS. Right now I'm looking for ethernet cards that I can use for the green network, but I don't know if I can use 2 for the same network. I'm trying to get 4 ports at 1000 Mbs, and the only thing I've been able to find so far that's within my price range is a card from startech that has 2 ports, but would I be able to use 2 for the green network?
View 3 Replies View RelatedI've got two network card interfaces on my computer, one wireless and one wired. The wireless card is connected to the Internet and the wired is connected to the LAN. When only the wireless card is active, Internet works. As soon as i enable the second wired card, Internet stops working. And it seems like Ubuntu chooses the wired card for Internet as soon as it's enabled.
Are there any ways to solve this? So my Ubuntu box always chooses the wireless card for Internet traffic and let me use the wired device for LAN only?
I have a fedora 10 box with two network card on eth0 I have a pppoe connection to the internet, on second card eth1 I share my internet connection end I set up a samba server but I don't know if the settings are good. How to do this settings right to work fine, the ip are assigned by dhcp I don't use any static ip .When I try to browse the internet from the other computers some site's like {.com ; .org ; .info} are block, other site from {.ro} are working. Someone tell me something about turn off all my filters, but I don't know where to find this filter to turn it off. And when I use samba I can't have and internet access or vice versa. My network look like that:
Code:
eth0
|<--pppoe connection
|
MyComputer
(fedora 10)
|
eth1
|
switch
|
comp.1 comp.2
Win OS MacOS
I have a strange problem regarding networking on the Alix 2d13 running Ubuntu 10.04. The Alix has 3 physical network interfaces, lspci says:
Code:
00:09.0 Ethernet controller [0200]: VIA Technologies, Inc. VT6105M [Rhine-III] [1106:3053] (rev 96)
Kernel driver in use: via-rhine
Kernel modules: via-rhine
00:0a.0 Ethernet controller [0200]: VIA Technologies, Inc. VT6105M [Rhine-III] [1106:3053] (rev 96)
Kernel driver in use: via-rhine
Kernel modules: via-rhine
[Code]...
It seems, if more than one cable is connected, a random hardware port is chosen as eth0-eth2. If only one cable is connected the port that is connected is chosen as eth0-eth2. Any idea what's going wrong here?
I've installed Ubuntu Server 10.10 with two network cards. One for external, and one internal.My problem is that as soon as i activate eth1 (external), i can't access the server from the internal network (eth0)
With these settings i can't reach the internal network from inside.If i disable the gateway on eth1 and enable the gateway on eth0, it works.
I have a desktop computer running OpenSUSE 11.2 with two network cards installed. I would like to use both cards for connecting to the internet using different networks. The setting would be the following: eth0 is the main (default) card, almost all programs should use this NIC for connecting to the internet. eth1 is used only by a few programs, which have setting for selecting which network interface to use. The two NIC's are connected to different networks, so the IP address of the NIC's, the related subnet masks and gateways are also different.
Saying short, I would like to have the two NIC's as they would be in two separate computers. I can set the IP address and subnet mask of the NIC's. The main problem is that I can only declare one gateway. How can i setup this? I do not use network manager, I configure network cards using yast, but if needed I can of course use ifconfig directly.
I'm planning to use Debian as the OS for a firewall machine, which will sit between my internet connection and the rest of my computers. Now my network is all wired, no wireless whatsoever. I'm using the onboard the motherboards cat5 socket which seems to be using the VIA rhine driver and I'm also using a 3com 100MBps card.
I can list the machine spec if you want but it's nothing special, an old Athlon 64 rig with 1gb ram and an OEM motherboard, it all seems to work ok apart from the internet doesn't' seem to work. Lenny seems to detect both cards ok and I even used the net install CD and it managed to download everything using the 3com card.
The strange thing is when I'm in Lenny, I can't seem to connect. I can ping google, but when I try and view a webpage, the browser just sits there with a while screen... Could it be that using 2 network cards is confusing Debian? Right now I've only got the modem hooked up the the 3com card, and nothing connected to the onboard network card.
I am using open suse 11.1 in my acer emachine laptop. Everything is okay except Network cards are not working. It says that firmware is missing or kernel problems. My network cards are Broadcom network cards. How can I fix it?
View 9 Replies View RelatedI m pretty new to Linux..! I've been given a task to modify network protocol(TCP in particular). So now i've to make few changes to the kernel which includes modifying few source files. So i want to know how can i go abt it. Till now i've explored various .c files of kernel(Eg.tcp.c,tcp_input.c etc etc)by referring few books. And now comes the important part of implementing it. So how exactly can i go abt it?? I went thru various threads like installing a kernel,compliling a kernel and other things. But i m not getting the exact sequence in which i should do it. I've installed fedora 10. But i cannot see any source files which i can modify. Where and how can i modify these files?
View 5 Replies View RelatedToshiba T110 laptop, 4 meg ram, kernel 2.6.31-14; multi boot Suse / Ubuntu / Windows; Atheros AR8132 Ethernet card; Realtek RTL8191 SE wireless card.
Installed 9.10 from an old DVD lying around - everything appeared to go ok, but no networks cards - Ethernet or wireless - were detected during the install.
(Later versions do not install - problems somewhere with video card - I need to allow multi kernel selection - but this is another issue)
Does this mean that this install is toast, or can it be saved?
I have two D-Link network cards installed in my computer. The Ubuntu 10.04a2 installer seemed to recognize only one of them, though I know both are functional. I plugged a CAT5 cable in here, connected to my home network (with Internet). The installer proceeded happily, configuring DHCP and synchronizing clocks. However, when I rebooted after its completion, Ubuntu didn't recognize that I was connected to the network. I re-jiggled the RJ-45 connector, to no avail. When I run "System Testing," it does list both network cards during the Network suite, one being D-Link, and the other "James Bond" or something. So, what gives?
View 2 Replies View Relatedanyone know network packet editor for Linux? or modify network packet in wireshark?
View 1 Replies View RelatedI have a dns server started with 2 NIC Cards in it. The bios sees both cards but they both dont show in ifconfig. is there a way to activate the second card?
View 1 Replies View RelatedI just installed Debian 5.0 onto my laptop (Dell e6410) and it appears to boot and run fine, except that it does not recognize the network card (it did not do so during the installation). It also does not seem to recognize the wireless card.I have an ethernet connection, but running ifconfig displays only the local connection.I have tried adding -nomodeset and -noacpi to the boot menu, but that does not seem to change things
View 9 Replies View RelatedI have a Proliant 7000 with 4 interfaces across 2 cards - 3 intel 10/100Tx and 1 intel 100FX. During install it detected the 3 tx interfaces - but couldnt see the network - post install the network devices were no longer there, their devices missing from /dev/.
Neither google nor a forum search have been particularly edifying, is this a known issue with any cards? If so is there a known fix? ifconfig gives me information for loopback only as expected.
Does anyone have a kernel that supports Atheros network cards? I am using ASUS EEE PC netbooks and none of the kernels I have access to have drivers installed for the NICs. I am having issues when I try to build my own kernel and maybe someone has a precompiled one? Either that or if someone has a basic, step-by-step guide to building your own custom kernel. This is my first time building a kernel and I am kind of lost. This isn't actually for running Ubuntu I will be using it in an imaging program called FOG. I just need a kernel that will support these NICs so I am able to do some imaging.
View 5 Replies View RelatedI want to share the wireless connection from an Ubuntu machine with an old lap top via the wired Ethernet cards. the old laptop doesn't have wire less. the Ubuntu machine is 10.04 LTS -the Lucid Lynx.
View 1 Replies View RelatedI was saddled with the job of maintaining my department's website (I work at a college). When I still used windows I would access my department's folder on the web server using the following procedure: (in windows XP) go to the start menu > click 'run' > enter the folder address, I would be prompted for my login and password. The folder, and the whole server in fact, would then be visible in the windows file browser, under the 'networks' icon. I could then navigate to my department's folder and modify the files I need to to update the website.
How do I do this in Opensuse (using Gnome). I tried going to 'network' in nautilus and then 'open location' but no luck. I also tried 'connect to server' in nautilus (in the 'file' menu), but again no luck. which I could stomach if my college provided reliable access to computers on campus, but they don't so I have to use my laptop, which is now windows free . My current job is only going to last for a few more months, so having only so recently got rid of windows I am reluctant to re-install it just for this purpose (which is just about the only reason I currently have for using windows - the other is being able to download audiobooks from the public library, but that's another matter).
how to make my second network card work?Here is the info (debian lenny) I am at right now:
ifconfig -a:
-----------------
eth1 Link encap:Ethernet HWaddr 00:50:ba:42:5c:a2
[code]....
I use a network-connected HP printer through hplip and cupsI'm trying to discover how to access the media card ports that are built-in on the printer. Q1: Is there some way that my linux workstations can mount or otherwise access these flash-media cards?If not, then,Q2: Does anyone know about a network-connected, shared resource, multiple format media card device?(My wireless router has a USB port for shared things, but I think
View 6 Replies View RelatedI've been searching all over trying to figure out how to get my Slackware box to detect my 2 PCMCIA wired nics. Specs are:
Dell Latitude CPi (old, I know...)
Compaq 10/100 PC Card (series NNB108)
Xircom "Credit Card" Ethernet 10/100+ and Modem 56 (model: CEM56-100.
Slackware 11 (kernel 2.6.21.5)
Both cards work under Ubuntu 9.04 on the same hardware so I know they are both working and linux compatible.
Checking the /var/log/messages file I see entries when I insert or remove the card. States that a PCMCIA card has been added/removed however other than the /messages log entry there is no other activity that I notice. No lights on the NIC card dongles either. Most of the reading I've done on the net indicate that there should be a /etc/pcmcia/network.opts file but I don't even have the /etc/pcmcia directory. Sure would appreciate some guidance on where to go or what to do to get these two PCMCIA nics up and running.
I'm wondering a couple of things about my LAMP stacks:
1) How do I get a list of all the network cards installed in a linux box? I've run this command and it shows 2 network cards which is probably all of them:
Code:
mii-tool -v
2) How can I check the percent utilization of a given network card? I.e., at any given time, what linux command will tell me the how much of a network card's bandwidth is being consumed? I've checked both ethtool and mii-tool and I don't really see any helpful stats.
3) How can I make sure that a linux box will optimally use both network cards? I'm a bit fuzzy on how IP addresses and network cards and hostnames work together.
I've been using wicd (1.6.2.1 was the latest version on my desktop computer, maybe it got updated) without any problems for a long time. This morning after switching the thing on to read the morning news with a nice hot cup of coffee I got a number of funny Gui system messages: Wicd needs to access your computer's network cards. Password
View 12 Replies View Related