General :: Gateway Got Choked By NIC Card Of One System?
Feb 1, 2011
we have several servers working on 172.15.2.X series .Our mail server ip is 172.15.2.4 & plateform is linux as it is squirrelmail server.other server which have the same series of ip are working on win2k3 plateform.however I try to recognise this problem by iptraf tool but can't get positive result.
Sometime the ip of all 172.15.2.X series could not ping from outside and LAN as well .
We has been temporarily resolving this problem by
1 changing gateway on all servers as well on firewall.
OR
2 change the ethernet card on mail server and configure same ip on new one .however we have only two NIC card on mail server .The problem resolved temporarily for one OR two hour after it same problem on that card also.than again we have to do same step on switching on another NIC card and reconfigure IP and do down first one.
OR
Take shut down for few time the mail server. But by these all above are not permanent solution BKZ After few hours mailserver starts blocking the gateway again. Than we want to know that what issue can be with this server
1 Are we need to configure VLAN?
2 Is that hardware problem?
3 Is this traffic overflow problem whcih is chocking the gateway of whole network machine having same gateway?
I am sending the few attachment to you please revert ASAP.But keep in mind one thing that attached document indicate the good running mailserver configuration.may be you could not found any problem in this conf.
In order to resolving this problem I have tried by changing duplex mode to
1 > 1000 MB/ps full duplex utonegotiation off
&
2 > 1000 MB/ps full duplex autonegotiation on
but can' get positive Result. I have also tried by IPbinding but it was useless. I think some thing wrong is happening in mailserver which make gateway chocked and 172 series server got also affected by this because they could not get path of gateway as it got choked by mail server's over broadcasting .Although I have make ready the old mailserver it is working but it is cabinet server & not reliable so please suggest for that problem.
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Jan 23, 2011
I am looking for ideas or an explanation of what happened to this system during an update. Here are the details: I had a fresh version of Ubuntu 10.10 installed in its own partition and it seemed to be running OK. I decided to get all of the updates for it so I fired up the Update Manager. I decided to get everything so I left all of the selections checked. Then I started it updating and observed that was going to download more than 200 MB so I went away for a while.
In normal operation I get about 80K bytes/sec download speed due to my internet connection speed. This allows the system to loaf along and the CPUs typically report only about 2 to 7 percent usage.
I had a few other things running before I started the updates: a terminal, the system monitor, and Firefox. I had ssh connected from another machine. When I returned to the system I found that the progress bar showed about 2/3 done and the update manager was announcing the name of one of the packages, I don't recall which. I noticed that the system monitor was not scrolling but it was not showing much CPU usage. I watched things for about a minute and did not see any change. I thought that something had crashed during the updates and I started to figure out what to do about that. Then I noticed that the system monitor had scrolled just a tiny amount - the system wasn't completely dead. So I watched it for a while longer and it scrolled another tiny amount. The mouse and cursor were operating normally so I fired up top in the terminal. This ran, although slowly, and it reported that most of the CPU time was going to gnome and to Xorg but no entry showed more than about 27% usage. (This system uses an Intel 950 with 8 processors.)
I spent a couple of minutes wondering what was going on and wondering what I should do. Suddenly, the system monitor started to scroll at normal speed and the graphs were typical. Apparently, whatever was wrong had cleared itself. The updates proceeded normally and finished. The system seemed to be running normally.
I was concerned that something may have been corrupted so I booted from an older release from a different partition. That version worked OK. I rebooted from the newest, updated version and the boot seemed to proceed normally up through the time when the system played the drumroll associated with login. However, instead of getting a login screen I had only the purple splash display with 5 red dots and nothing was changing; there was no login box. Since I could not log in, I reset the system and booted from an older release and this worked OK.
The next time that I booted the updated 10.10 release, it worked like it should. When the system was choked up, it was acting like it was extremely busy and did not have enough CPU time to update the display. But the cursor moved as it usually does, without hesitation or jerkiness.
I am not running the proprietary fglrx driver; whatever the 10.10 install provided is presumably what I am using. This system has two ATI HD4870 graphics cards because I want to run crossfire mode.
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Jul 13, 2009
I have two network card in my computer.
1. eth0 is set to automatic obtain IP from provider (DHCP)
2. wifi0 is set to static IP (local) 192.168.1.1
My ifcfg-wifi0 is configure in /etc/sysconfig/network-scripts/ifcfg-wifi0 as below
# Atheros Communications, Inc. AR5212 802.11abg NIC
DEVICE=wifi0
ONBOOT=yes
BOOTPROTO=static
IPADDR=192.168.1.1
NETMASK=255.255.255.0
HWADDR=00:17:9A:75:48:37
my /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=pc1.homeserver.in
eth0 IP is connected to broadBand internet service provider device WiMax and IP change time to time from internet service provider. How can I get IP for gateway in /etc/sysconfig/network. I am using Redhat enterprise Linux 4.
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Apr 3, 2011
I'm using a Gateway LT3103u running a dual boot of Win 7 and Ubuntu 10.10 (separate partitions) and ever since I've started using Ubuntu (last October) I've had persistent graphic card problems.
My graphics card is the ATI Radeon X1270.
Right now I can't use any visual effects because of I do the screen spazzes out and becomes unusable. This isn't a big deal for me since I don't use them but I figured it's relevant to the problem.
Even with visual effects off I still have problems and at times parts of the menu will stay on the screen in a little box which covers any windows that open beneath it. The only way to get rid of it is to turn visual effects on so the screen resets then hit use previous settings.
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Jan 7, 2009
I have a network gateway system which runs redhat 7 (2.2.16)
Firewall running is ipchains
Internal network is eth0 192.168.5.1
External network is eth1 99.99.99.98 (example add)
My problem when I change the static address of the external network from 99.99.99.99 to 99.99.99.98 I am not able to connect to internet. From my preliminary investigation ip is not binded to network card., but I am not sure, is there a way to check binding accurately
Below is the ifcfg-eth1 file contents
DEVICE="eth1"
USERCTL=no
ONBOOT="yes"
BOOTPROTO="none"
NETMASK="255.255.255.0"
IPADDR="99.99.99.99"
IPXNETNUM_802_2=""
IPXPRIMARY_802_2="no"
IPXACTIVE_802_2="no"
IPXNETNUM_802_3=""
IPXPRIMARY_802_3="no"
IPXACTIVE_802_3="no"
IPXNETNUM_ETHERII=""
IPXPRIMARY_ETHERII="no"
IPXACTIVE_ETHERII="no"
IPXNETNUM_SNAP=""
IPXPRIMARY_SNAP="no"
IPXACTIVE_SNAP="no"
I have updated the address change in ipchains firewall scripts. Before IP change network was work fine with this firewall scripts.
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Jun 4, 2010
Basically I'm working as part time administrator in a company, and still am at college. To keep the story short, the company I work with used to have a linux gateway, namely Untangle. We tried to upgrade to E-Box, which is supposed to have more options than Untangle, but it doesn't seem to work as it should. What I'm trying to ask here is this. I need a gateway system that handles QoS, Content filtering, Mail Filtering, DNS, Wan failover / load balancing, LOGS (important), Firewall and maybe the handling of separate users or groups. The ideal solution would be one that like the E-box, has a central control system, without the need to adjust code in CLI for configuration. I have some experience on CentOS and Fedora, so I am able to do some configuration, like installing Samba, DHCP and VNC.
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Sep 16, 2010
I can very well configure squid transparent proxy on gateway server.But i want the squid transparent proxy on non-gateway system as i already have hardware firewall installed.i.e i want to redirect all the traffic coming through my gateway (hardware firewall) 192.168.200.1 to my squid server 192.168.200.3 on port 3128.How it is possible? Without transparent proxy by directly giving proxy ip in browser i can access internet but how to do it in transparent mode?
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Dec 19, 2010
I could not able to configure the default gateway ip address onto the system. i use the route command (" route add default gw 192.xxx.xxx.xxx eth0 ") to add a default gateway onto the routing table but it is "disappear" in the routing table when i had restart the service network.
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Jun 8, 2010
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Jun 4, 2010
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As per the subject really, is it possible to configure sendmail to use my ISP's SMTP gateway? If so, how?
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Aug 2, 2011
We are using Linux machine as a gateway server to connect our local network to wan. We use pptp vpn to connect our remote customers network, is it possible to connect VPN to the gateway and make local network to connect through it? So that there is no need to connect vpn in every local client.
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Oct 19, 2010
My problem is i use a command " route add -net to add a route oand gate way, how do i remove the route addid if it is incorrect but also my pc's use a standard static ip 192.168.1.X but my gateway is as a given 196.215.X.X if i add this gatway there is no internet but the same gateway is used on windows pc's
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May 6, 2010
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Jun 18, 2010
in fedora/redhat system I want to add IP address along with Default Gateway and DNS.For assigning IP to eth0 i use the command # ifconfig etho 192.168.1.10 subnet mask 255.255.255.0 upthis remain temporary and when I restart my system it lost the IP address. Well to permanently add IP address in etho I use the file #cd /etc/sysconfig/network-scripts and then use # vi ifcg-eth0 to add IP address and Network Mask. How can I add Default Gateway and DNS permanently in ifcg-eth0 file or there is any other file for it ?
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Sep 6, 2010
Possible Duplicate:Forward SSH traffic through a middle machine.I am looking to get an interactive ssh session on a remote machine, but must login via a gateway.For example, right now I do the following:
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@gateway % ssh <user>@<remote>
Is it possible to achieve the same thing in a single command from my local machine? I have tried:
@local % ssh <user>@<gateway> 'ssh <user>@<remote>`
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Jun 10, 2011
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Mar 5, 2011
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Jun 14, 2011
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vi /etc/modprobe.conf
alias eth0 bnx2
alias eth1 bnx2
alias scsi_hostadapter aacraid
alias scsi_hostadapter1 ata_piix
alias usb-controller ehci-hcd
alias usb-controller1 uhci-hcd
alias bond0 bonding
options bonding mode=1 miimon=100
[Code].....
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Jan 20, 2011
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Oct 25, 2010
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Feb 23, 2010
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