I have an Ubuntu 9.10 server installation which have been working flawlessly for some months. The server runs bridged networking, because of some VMs that runs on it. But, a couple of weeks ago the network connectivity have started to disappear now and then (usually once a day or so). Running "sudo /etc/init.d/networking restart" always kicks it back to life.
After a bit of debugging I noticed that when OK the routing table looked like this:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 * 255.255.255.0 U 0 0 0 br0
192.168.122.0 * 255.255.255.0 U 0 0 0 virbr0
default 192.168.1.1 0.0.0.0 UG 100 0 0 br0
While when in the non-working state it looked like this:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 * 255.255.255.0 U 0 0 0 br0
192.168.1.0 * 255.255.255.0 U 0 0 0 eth0
192.168.122.0 * 255.255.255.0 U 0 0 0 virbr0
default 192.168.1.1 0.0.0.0 UG 100 0 0 eth0
default 192.168.1.1 0.0.0.0 UG 100 0 0 br0
Deleting the two routes to eth0 restores the networking again. Why these "erronous" routes gets added, and what adds them? How to further debug this?
routing tables using "ip route 2" I have a server(server1 from now on) with eth0(internet connection) and eth1(lan connection). eth1 have 2 more alias devices = eth1:1 and eth1:2 On my server 1 the eth0=public ip, on eth1=192.168.10.1/24, eth1:1=192.168.20.1/24 and eth1:2=192.168.30.1/24 server1 is running squid and iptables to all 3 networks (eth1, eth1:1 and eth1:2) All of the clients have access to internet. Now what i want to do is add 3 more networks via a router(linuxBox = server2 from now on) connected to server1 in eth1. so the network will be like this:
Code:
server1 eth0=internet eth1=192.168.10.1/24 (connected to server2 and other clients)
After a long time that I didn't touch my PC I just forgot how to configure the routing table I trying to ping the router and get "destination host untraceable" I manually assign the ip of the machine to 192.168.1.2 .And the gateway ip to 192.168.1.1 the only problem now Is to get to the router interface on 192.168.1.1 to configure my internet and to browse
A packet is sent from the computer to the router it's connected with only the destination address in it, right? So - what does "kernel routing table" mean?
My routing table does not get complete for some reason. I'm using a Huawei E220 USB modem on openSUSE 11.3 using NetworkManager to connect.When I connect to the net the routing table looks like
Code: /home/freefox # route Kernel IP routing table
eth1 which is connected to interneteth2 internal networkbecause the server is part of a complicate network i need to setup the routing tables for eth1 and eth2but i need that the default 0.0.0.0 must be read from eth1 while i dont know why the server first read the one on eth2. this creates big problem to me.if i add the default route to eth1 i get an error saying that the default route already exist (i suppose is the one on eth2)how i can solve this ? i must create a script that first delete the default from eth2 and after add it to eth1
When I try wget URL... I get failed: connection timed out.I have created br0 as a bridge over eth0 to run this VM. The host has this IP 172.30.8.135.The host has access to internet through eth0 and this is the output of route inside the host.
i used to have ubuntu 9.i decided to move to sabayon so i used the live cd to install it ,resize the ubuntu partition and use the remaining space for sabayon.while the resizing procedure i got an error(i dont have a copy of the error log file but i know it has something to do with an anaconda process).i aborted the installation and the result was an filesystem that couldnt be mounted.when i try to mount the hdd i get this:
Code: Error mounting: mount: wrong fs type, bad option, bad superblock on /dev/sdb1, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so and this is what i get from fsck: Code: $ sudo fsck -f /dev/sdb1 code....
What I believe has happened is that I've corrupted the partition table. Essentially one of my partitions' ending point exceeds the maximum number of cylinders/sectors on my drive.
Essentially I have the same problem as on the thread @ [url] but do not know how to fix this and am afraid to reformat/partition based on sectors without really knowing what I'm doing here.
[code]...
When I try to look at SDA in GParted everything shows up as unallocated (though it's obviously not) and it says
What exactly does gateway in a route refer to? I know what a default gateway is- it's the route of last resort. But used in context of a host route (with destination specified), what is a gateway and why is it important?
I have one external ip address and a few domains. Would it be possible to have each domain on a internal domain and the box that sits on that external ip route to the internal. This would be for a number of server (mail, apache, imap, pop3, https ) So for example:
Some visit domain1.com ->external ip -> 192.168.10.100 Someone else visit domain2.com ->external ip -> 192.168.10.101 and so one with a number of domains
I'm having problems with the ftp-server ProFTPd,If I transfer files from a Linux host to a Windows client, it says that my transfered files are damaged, so I'm unable to open them..I've searched this forum and several people say I have to set the default transfer mode to 'binary' mode.I did that, but it didn't work at all for me... so despite the binary transfer mode my files are still damaged when I transfer them.when I do it through SSH, it works fine, so the problem is the FTP-server...
Just curious to see what everyone's opinion on using routing vs. bridging for openVPN. I'm installing openVPN on a linux box that I'm using as a router. What I was wondering was your opinions on which one of these two options to use.
I am playing with openvpn, and I got stuck.I am using ubuntu server for openvpn server, which has 2 physical NICs, one is directly on internet and other is LAN, where few pcs are connected on.
I want to use tab networking in my kvm with routing.Can any one guide me how i can do it. i have been reading different guides over the net but not understand any one clearly.I have read this[URL].. One problem is this all my server are remote and no gui is running.I am able to install kvm with ssh console with -nographic and -x "console=ttyS0" option now i want to change from bridging to tap networking with routing.And i have live ip on kvm guest/Virtual machine.
I'd like to report an issue I've had with Ubuntu server ISO. I downloaded ubuntu-9.10-server-i386.iso by HTTP on ubuntu's website and burned it on a CD. It doesn't work well. I got an error in udevadm sys/devices/pci0000 etc. it was a problem with the hardware, but it seems that it's the ISO that is corrupted. I checked the MD5 checksum and it's not good. Then I download the same ISO a second time (by HTTP) and same problem.
So it seems to me that the ubuntu-9.10-server-i386.iso that we can download by HTTP is not the same as the torrent one. Maybe I'm wrong. Anyway, if I'm right I hope this information will be useful for administrators.
As far as I can tell, the server guides only explain a bit about what dynamic routing is, but not how to implement it.
My situation is this:
We require a server with 3 interfaces. One local, one to a vsat link and the other to a fibre link. The fibre will be the default route for Internet traffic but we want dynamic routing to automatically switch to the vsat link when the fibre link goes down (which happens fairly often in Zimbabwe!) and then switch back to the fibre link when it comes back up again.
The first option would be to handle dynamic routing on a Cisco router, but at the prices of Cisco devices here, it's not the most affordable option.
So my server running FC4 died last night and I decided to go ahead with the long-awaited upgrade to FC10 while I was rebuilding my server. I use my server for a number of things including, but not limited to: router, firewall, web server, mail server... I have a typical configuration process that I have followed since before fedora, and it has worked well for me up through FC4, but my usual config process doesn't work on FC10.
First of all, I don't want SELinux running, I didn't see an option to not install it during the FC10 setup, so how to I properly disable or uninstall it afterwards? Second, I was unable to even configure the server to route traffic from my internal network to the web, here's the process I usually go through for this:
[Code]...
I don't have a static IP from my ISP, so I'm not quite sure how to add the default route. I think I need to do something like "route add default gw xxx.xxx.xxx.xxx eth1" where eth1 is my external NIC, correct?
What else do I need to do to route traffic? I noticed that I wasn't even able to ping my server from the internal network even though they are on the same subnet, my server's internal NIC has an address of 192.168.7.1 and my computer on the network has an address of 192.168.7.2. If I can get this going to I have internet access again at the very least, I can move forward with the web server, email, etc.
I have an environment of roughly 30 machines that all have ssmtp installed with identical config files. I also have logwatch installed on all of them, and it runs nightly as it is supposed to. The problem is that any given night, a random number of machines do not send out the resulting email from logwatch but instead dump it to ~/dead.letter. The number of failures changes every night, but most of the time it is between 20 and 30 of my servers.
I am attempting to copy files from one server to an external USB drive on a second server. Both servers are running custom RedHat Linux, kernel 2.6. Both are setup as Check Point SecurePlatform (one is a log server and the other a management server). I am trying to archive files from one (HP DL380 G5) to the second (HP DL380 G6). I am not able to archive directly to the external usb drive when connected to the HP DL380 G5 (data gets corrupted and switches to read-only access). The external USB drive has no issues when connected to the HP DL380 G6 server, thus my reason for trying to copy the files across servers.
When I attempt to use scp to copy files between the server, I am prompted for the password. Once entered the debug shows the authentication is successful, but then no files are copied (see log below). I have tried searching for potential answers, but none have panned out. Unfortunately I can't yet post the actual scp debug log output as some of the text is viewed as a URL and not yet allowed for me. I have changed all the atsign symbols to '(a)' to avoid the URL inference.
Output log from scp attempt follows: [Expert(a)server1]# scp -p -r -v /var/fromhere/* copyfile(a)server2:/media/disk/tohere/ Executing: program /usr/bin/ssh host server2, user copyfile, command scp -v -r -p -d -t /media/disk/tohere/ OpenSSH_3.6.1p2, SSH protocols 1.5/2.0, OpenSSL 0x0090707f debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug1: Rhosts Authentication disabled, originating port will not be trusted. debug1: Connecting to server2 [192.168.10.3] port 22. debug1: Connection established. debug1: identity file /root/.ssh/identity type -1 ..... debug1: Exit status 1 lost connection [Expert(a)server1]#
There are two connections in my Ubuntu server: eth0 is a normal interface and, eth1 is configured with an static IP, and has an domain name with that IP. But this connection is charged by bytes, very expensive.
how to set up the route table so that: everyone can access my server with the domain name, and let the traffic goes from eth0 as much as possible(I have a proxy service on my server. At least, let the proxy traffic goes from eth0)?
I am trying to install some program: rosinfo: - Create mysql database for rosinfo - Create table hosts, locks. Use file docs/rosinfo.sqlAnd I need to create table hosts, locks, using file rosinfo.sql. I have that file, but dont know what to do with it.
I've started a webserver at 127.0.0.1:**** I want to be able to use a database for this server. Which schema do I use to add a new table to? Do I create a new Schema altogether?
I'm COMPLETELY new to linux. I"m running Ubuntu 9.10 and TRYING to install Devede. I have tried the Terminal, Synaptic Manger, and the Add/Remove and still keep getting this same error. I'm running a regular 32 bit Pentium 3 process to test if I like Linux or not. this is what it says: E: /var/cache/apt/archives/libavcodec-extra-52_4%3a0.5+svn20090706-2ubuntu3_i386.deb: corrupted filesystem tarfile - corrupted package archive this is not a DUAL boot computer either.
