0
votes
0answers
5 views

Duplicate Ubuntu Server VM in Parallels loses networking

I've created a fairly vanilla Ubuntu Trusty VM in Parallels Desktop, but when I clone it the resulting VM has networking issues. After shutting the original VM down, I duplicate the .pvm bundle with ...
0
votes
2answers
57 views

Setting up a server with two NICs using two separate subnets (each on a different VLAN)

I'm using Ubuntu 14.04 (standard server install + OpenSSH, biosdevname=0 during instal to keep the network names simple) in an environment where I have two non-overlapping subnets M and N on different ...
-4
votes
1answer
45 views

Ubuntu insufficient disk space [closed]

I am getting an insufficient disk space error, here is my df -h Filesystem Size Used Avail Use% Mounted on /dev/sda1 29G 28G 31M 100% / none 4.0K 0 4.0K 0% ...
0
votes
0answers
57 views

Dual homed Linux host (Debian/Ubuntu) using DHCP

We have an Ubuntu server with 2 NICs. Each one is on a different subnet. Besides there's a third subnet. Clients sit on all three subnets. All clients should be able to talk to both server IPs so we ...
0
votes
1answer
243 views

KVM Ubuntu Guest cannot connect to the internet on bridged networking

I have Ubuntu 14.04 (64 bits) + KVM Host with 2 NICs: - eth0 connected to the "public" network - eth1 connected to the br0 bridge with a private ip address range From Host I can access internet, ...
2
votes
1answer
44 views

Two LAN cables when using Remote Access Card?

I recently bought a HP MicroServer N54L and a HP Remote Access Card. Connecting to the server over a KVM viewer for BIOS setup etc. works fine, but when it comes to installing Ubuntu 14.04. the ...
0
votes
1answer
83 views

How to load new profile in Network manager v0.9 without nm-connection-editor using cli?

i'm working on migration of autoprovisioned Ubuntu 12.04 LTS servers from ifup (/etc/network/interfaces) to NetworkManager. /etc/network/interfaces is clean (only loopback interface is configured): # ...
1
vote
1answer
332 views

Ubuntu 14.04 LTE forward port to another port

I am looking for a way to forward 1 port to another internally. I have an Ubuntu 14.04 server on which I installed a game server that listens on port 25565. The game does not support multiple ports. ...
0
votes
1answer
70 views

SSH connection timing out on certain clients only

I have a server that has around 100 SSH tunnel connections active from client servers across Canada and the US. We use the same device that runs a custom build of Ubuntu and load that on each client ...
1
vote
2answers
188 views

All traffic is passed through OpenVPN although not requested

I have a bash script on a Ubuntu box which searches for the fastest openvpn server, connects, and binds one program to the tun0 interface. Unfortunately, all traffic is being passed through the VPN. ...
0
votes
0answers
175 views

php-fpm process in D state ,cause nfs wait rpc_wait_bit_killable

my wordpress site which is in clustered environment using NFS,nginx,php-fpm,mysql the infrastructure is hosted on amazon ec2.Under high load/traffic the php5-fpm process goes in D ...
0
votes
1answer
139 views

Can't reach multi-homed Ubuntu from different subnet

I have a multi-homed Ubuntu 12.04 server. I have two network interfaces connected to two different IP ranges. 2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen ...
1
vote
1answer
162 views

Split tunneling through two VPNs simeltaneously

I want to run two OpenVPN client instances on an Ubuntu Server 14.04. I have both .conf files that can work independently (both are set to different interfaces - tun0 and tun1). I want to run both at ...
0
votes
1answer
260 views

Can't connect to 2 different Linux computers via VNC (local network)

I have a problem connecting to Vino VNC server with 2 Linux Computers running Xubuntu. The computers are Based on the ODroid U3 chip which is ARM based. When both of the ODroids are on the same ...
1
vote
1answer
38 views

Sharing a file system, or how to horizontally scale access to files

My API mostly serves up stuff from the database, but a big part of the product is generating images by combining SVG files with large pattern fills (~50MB tiff files). The API can scale ...
0
votes
1answer
56 views

Only one server behind a switch cannot access the internet and vice versa

I have multiple servers deployed behind a single switch. All the servers have their own public IP addresses. Suddenly one of them (say A) cannot be accessed from the outside by any means, e.g. HTTP, ...
0
votes
1answer
224 views

Setting the default network interface

My /etc/network/interfaces looks like this: auto lo iface lo inet loopback auto eth1 iface eth1 inet static address 10.0.0.99 netmask 255.255.255.0 gateway 10.0.0.1 auto eth0 ...
0
votes
0answers
348 views

Routing issue with KVM: Gateway on different Subnet than VM

I have Server at hetzner.de, with a /29 subnet for running KVM-VMs. The VMs get network access via a bridge interface. I'm currently using two IPs from the subnet. The VM-host is running Ubuntu 12.04 ...
1
vote
0answers
330 views

Using ebtables to drop packets out of bridge and route via Tinc VPN

We have a bridge set up on Ubuntu to link our LAN to our gateway which is on the same subnet. We need this to be able to control the traffic and are not currently in a position to change subnets so we ...
0
votes
0answers
1k views

Always get “SIOCADDRT: File exists” when restarting networking on ubuntu

I have a problem very similar to getting error "SIOCADDRT: File exists" when trying to restart network on ubuntu, but it is not a duplicate for reasons explained below. My ...
1
vote
1answer
115 views

How do I receive traffic to the public IP of an additional ENI on EC2 Ubuntu?

I've added an additional network interface with elastic public and private ips. In ubuntu I can see the interface getting a local IP from DHCP, but I cannot ssh to the additional public IP. I'm ...
1
vote
2answers
252 views

Ubuntu Server 12.10: set up network bridge in the initramfs pre-boot environment

In this scenario, I have a machine that boots its root volume off of iSCSI, and it only has a single network interface. If network configuration is done the normal way, then taking the interface down ...
1
vote
1answer
124 views

Ubuntu Second Wan Interface Card

I configured 3 network card. one of them is LAN card and others are Wan network card. eth0 Link encap:Ethernet HWaddr 00:50:56:00:30:da inet addr:5.x.x.1 Bcast:5.x.x.3 ...
0
votes
1answer
97 views

Open Stack Installation - single server

I have managed to set up openstack on a single machine, everything appears to work with exception to being able to ssh. I can ssh to the instance from the host box, which has a public ip. However as ...
1
vote
2answers
516 views

Network no longer works after replacing components on Ubuntu

The motherboard of my server (Ubuntu 8.04) died, so I replaced the motherboard, CPU, and RAM. Now I cannot get the server working on the network as it was configured. The network is configured ...
0
votes
0answers
142 views

OpenVPN clients cannot access internet able to access LAN

Clients are sucessfully connected to OpenVPN server and they are able to access lan share drives, but they are not access internet Below is my OpenVPN server conf file mode server local 10.2.2.121 ...
2
votes
3answers
766 views

VirtualBox guest responds to ping but all ports closed in nmap

I want to setup a test database on a vm for development purposes but I cannot connect to the server via the network. I've got Ubuntu 12.04vm installed on 12.04 host in Virtualbox 4.2.4 set to - ...
0
votes
1answer
266 views

Ubuntu guest on VirtualBox, add host-only adapter and lose internet connectivity [closed]

I've got an Ubuntu guest VM in virtualbox. When I add a second network adapter that is host-only, I lose internet connectivity. All internt traffic gets sent through the second interface, instead of ...
5
votes
3answers
4k views

Ubuntu: disable udev's persistent-net-generator.rules

I'm using Ubuntu 12.04 LTS server edition and I am modifying /etc/udev/rules.d/70-persistent-net.rules to define my own mappings of ethernet interfaces to MAC addresses; that file is initially ...
1
vote
5answers
10k views

ubuntu server 12.04 can not remove dhcp-client

When I change network from dhcp to static, it will periodically change IP to the dhcp configuration and ignore the configuration of /etc/network/interface. So I want to remove the dhcp-client, ...
0
votes
1answer
1k views

Ubuntu Server 12.04 ISC-DHCP-Server not working using standard configuration

I have been trying to configure the isc-dhcp-server package to assign ip addresses to devices connected to my eth1 adapter. Current Configuration interfaces: auto lo iface lo inet loopback auto ...
2
votes
1answer
669 views

iftop Shows Lots of Mysterious Connections - Not Showing in netstat

I've just stopped all pretty much all services except sshd on my server (Ubuntu Server 10.04), and when I run iftop I get output that looks like this: 12.5Kb 25.0Kb ...
1
vote
2answers
797 views

Linux (Ubuntu 12.04) two gateways one nic

I have Ubuntu 12.04 Server edition Two gateways, both on 192.168.0. network, let's make them 192.168.0.1 and 192.168.0.2 I've read you should be able to add second gateway into ...
1
vote
1answer
967 views

Load balancing ISPs on Ubuntu Server

I have a Dell server with Ubuntu 11.10 Server installed on it. The server has 3 Ethernet cards eth0, eth1 and eth2. I have two ISPs say ISP1, ISP2 eth0 has a public IP (provided by ISP1 - we require ...
0
votes
5answers
16k views

Ubuntu Server 12.04 can access LAN but not internet

Using Ubuntu Server (12.04) via command line, I can access the LAN (e.g. ping local machines) but not the internet (e.g. "ping google.com" or "sudo apt-get update"). How should I troubleshoot this? ...
1
vote
1answer
950 views

How do you setup a virtual IP on a Linux cluster?

I am having some problems setting a virtual IP and Linux (Ubuntu) cluster and I am hoping someone can help. This is the first node cluster I've tried to setup and I am not finding many resources in ...
0
votes
1answer
361 views

What is the simplest way to route web traffic via separate (dedicated) interface? [duplicate]

Possible Duplicate: iptables - Target to route packet to specific interface? Ubuntu 12.04. So on the client's machines I've got two NICs eth1 and wlan0. I'd like all the web browsing ...
2
votes
1answer
162 views

Pro Linux Administration Guide / Book [closed]

We run a cluster of 45 linux machines with a lot of different stuff running (nginx, Varnish, Apache, MySQL, memcache etc) and load getting balanced on different machines. We do around 3000 requests ...
7
votes
5answers
15k views

Can only bring up one of two interfaces

I'm having a bizarre issue with my HP Proliant DL 360 G4p server. It has two gigabit ethernet interfaces but I can bring up only one of them. This is starting to freak me out and that's why I turned ...
4
votes
1answer
5k views

Ubuntu: Network driver reset to eth0?

I've been trying to get my Ubuntu Server VM running through VirtualBox. I ended up trying several network interfaces because of some networking issues and finally got it working. However, I noticed ...
0
votes
1answer
648 views

Ubuntu 11.10 on VMware Player - No network behind proxy

I have VMWare Ubuntu 11.10 guest hosted on Win7. When behind a proxy, I am able to browse with chrome / firefox but all other network activity does not work (i.e. curl, system update, apt-get, etc.) ...
4
votes
2answers
5k views

How do I put a bridge on top of a bonded interface?

I'm setting up a Ubuntu Server 11.10 box with multiple Ethernet interfaces that are bonded for redundancy. I'm planning to use it as a KVM host, so I'll need a network bridge. To accomplish this, I ...
2
votes
2answers
910 views

IPv6 configuration SIOCSIFADDR file exist

I am configuring IPv6 address in a Debian machine, and this is what I have in my interface file. auto eth0 iface eth0 inet6 static pre-up modprobe ipv6 address 2001:23:207:141:0:0:0:0 ...
0
votes
2answers
1k views

Multihomed ubuntu inbound connectivity issue

I have a multi-homed system (Ubuntu server, 11.04) where eth0 is lan and eth1 is wan. There is internet connectivity through both, but via different routes. When the system boots, I cannot connect to ...
3
votes
1answer
2k views

What is the difference between MULTICAST and ALLMULTI ifconfig ifconfig flags

What is the precise difference between the ifconfig flags MULTICAST and ALLMULTI? Also How do I change the default flags under Ubuntu?
0
votes
1answer
197 views

samba not working on one interface

I am going a little crazy trying to get Samba working and would really appreciate some pointers. It's quite possible that I have misconfiged some part of the network configuration too. I am running ...
0
votes
1answer
88 views

Is there a way to detect the first time networking is run in linux after the computer starts?

Is there a way to detect the first time networking is run? I am referring to the very first time after the computer is started up, rather than when it is installed, ie networking has already been ...
2
votes
1answer
758 views

ubuntu/linux vpn connection with certificate

I want to connect to a windows pptp vpn server which accepts only connections with a CA certficate. From windows im able to do it easily (since its windows of course and native supported) but from my ...
1
vote
1answer
1k views

stunnel: SSL-to-SSL? (for smtp/imap)

How can I configure stunnel to accpet SSL connections, and connect then to an SSL port on a different server? Here is my setup: Our ISP's server, "Mail Server", supports smtp/imap over SSL. (Not ...
0
votes
1answer
68 views

Machine only responds to network requests from machines it is pinging

I have two machines. WOPR: Ubuntu server edition 10.10 LTS 32 bit Adam Selene: Windows 7 home premium 64 bit / Ubuntu Desktop 10.10 LTS 64 bit I want to be able to SSH from Adam Selene to WOPR, so I ...