-1
votes
0answers
47 views

Can access server from internet but server can't get out [closed]

Update(2014-10-14) - Issue turned out to be a second level of Firewall. The firewall on my servers wee OK, but the virtual networks firewall had port 80 blocked I have some new servers at a new ISP ...
0
votes
0answers
35 views

KVM virtual IP address not working on HOST, works on GUEST

I have a setup composed of the following: -> A HOST running KVM with the following network configs: # The loopback network interface auto lo iface lo inet loopback # The primary network interface ...
0
votes
1answer
40 views

Restarting the networking on the HOST makes GUEST lose connection

I am probably missing something but have a KVM virtualized HOST/GUEST setup. The GUEST is using a bridge (br0) on the HOST for internet connectivity. When I make a "/etc/init.d/networking stop ; ...
1
vote
0answers
97 views

Network Performance / SMB-CIFS / Guidance

I'm an IT professional working out of my home office. I'm having some performance problems (NAS file copies) which I'm trying to isolate, using iperf. My question is on iperf. Infrastructure - ...
1
vote
1answer
47 views

Trying to setup Multi-Homing under Ubuntu12 but can only get 1 of 2 IP to accept requests

I am having an issue on some new servers that we are creating under Ubuntu 12 in a virtual box running under VMware(VSphere I believe). This is at an ISP not my desktop. I think that we have the same ...
0
votes
0answers
45 views

Aggregate two pptp connection ubuntu

I used pptp client to create two pptp VPN connection ppp0 and ppp1. I would like to aggregate these two connections (in round-robin style). I tried bonding , but it seems that it only work for two ...
2
votes
2answers
312 views

Set iDRAC IP Address on Ubuntu 12.04 without Reboot?

We have a Dell PowerEdge R720XD server and want to setup iDRAC, but this is a production server so we need to do it without a reboot if possible. We just need to set the IP address on the iDRAC but ...
2
votes
0answers
2k views

Ubuntu 12.04/14.04 - apt-get 404 Not Found [IP: local-dns-server-ip 80] through proxy

I am trying to setup an ubuntu server (12.04 or 14.04) and have installed the server image onto the system I am using. Everything works fine until I try to run sudo apt-get update. When this runs, I ...
1
vote
0answers
15 views

Connection problema to specific IP

Sometimes, like twice a year a have problems of connectivity from my server to an api server. And only to that api server. Other third party services we use were working fine. I am not so good on the ...
0
votes
1answer
154 views

Using isc-dhcp-server to allocate addresses from subnet different from server subnet

I'm trying to break my network into different subnets. Server is located into 192.168.15.0/24 subnet. I have the following declaration in my dhcp.conf: subnet 192.168.15.0 netmask 255.255.255.0 ...
0
votes
1answer
368 views

How to set up reverse DNS on Ubuntu 12.04 VPS

As far as I can remember when setting up my VPS and mail server on it, I had configured the mail server correctly. However, a few of my clients get SMTP errors, host mx1.zonnet.nl[62.58.50.9] ...
0
votes
1answer
76 views

Handling many outgoing TCP connections

I was testing a server on EC2 with "High" network performance to check the maximum outgoing connections I could use on it. Without changing any settings, by opening around ~1000 threads which each ...
1
vote
1answer
220 views

kvm guest can not connect to outside of host, vice versa

I have a vmware vm running ubuntu 12.04 server(name=vmhost), with network bridged and full access to the internet. This vmhost is using the kvm hypervisor and is running a vm(centOS 6.4),network ...
0
votes
0answers
10 views

ubuntu not restarting after uninstalling dhcp3 client

I have uninstalled dhcp3-client using the command aptitude remove dhcp3-client dhcp3 common And I restart the ubnutu. But the box is not coming up. It has become a big problem now as i have lots ...
1
vote
1answer
2k views

Diagnosing packet loss / high latency in Ubuntu

We have a Linux box (Ubuntu 12.04) running Nginx (1.5.2), which acts as a reverse proxy/load balancer to some Tornado and Apache hosts. The upstream servers are physically and logically close (same ...
0
votes
1answer
36 views

How to configure DNS nameservers for Ubuntu cloud machines non-interactively?

I want to setup custom nameservers for my Ubuntu cloud instances (which have static IPs). When I try to edit /etc/resolv.conf, I see that it gets overwritten on reboot. If I try to set it in ...
0
votes
3answers
305 views

Installing CFEngine on Ubuntu 12.04 - Can't stat file

I am trying to install CFEngine on Ubuntu 12.04. For simplicity's sake, I am using a virtual machine with a fresh (with updates installed) version of Ubutu Server. I installed CFEngine 3.5.1 from ...
4
votes
1answer
284 views

Cannot ping B from A until B pings A

I have a server cluster all connected on a local network(all physical machines, not virtual). When trying to ping from Server A to B, I get a Desitination Host Unreachable. I can ping from B to A no ...
0
votes
1answer
659 views

DHCP server with multiple scopes is issuing the wrong IPs to VLANs

We're restructuring our network, and configured our router/dhcp server as follows: # public internet connection auto eth0 iface eth0 inet static address 192.168.10.10 netmask 255.255.0.0 ...
0
votes
0answers
60 views

No HTTP connectivity in vbox guests with bridged network

I'm running Ubuntu 12.04 Server x86. Network connectivity is on eth2 for the host server (the 10ge card). I installed VirtualBox 4.2 using the downloadable deb package from VirtualBox's website. ...
0
votes
1answer
63 views

Heartbeat with two machines each different network

I am able to configure the heartbeat for two machines at same network. Properly set&configure ha.conf and haresources. I would like to know how I can establish same configuration for two machines ...
0
votes
1answer
348 views

Cannot Traceroute/ssh outside network

My server cannot connect to ANYTHING EXTERNAL via ssh. I also cannot traceroute to any of them. Machines on the same network work fine via SSH and traceroute. This machine is connected to the ...
0
votes
1answer
60 views

Channelling DOM0 internet connection through DOMU

Bit of an odd queston but wanted to know your opinions on the following: I have a small computer that has Ubuntu (Both DOM0 and DOMU) virtualized using KVM. Now the person that will handle this ...
-1
votes
1answer
324 views

VirtualBox ubuntu guest can ping out and access other IPs on bridged network but cannot be pinged or remotely accessed

Aim: To be able to access RStudio Server page from other internal PCs (all windows) I barely know linux and everything I've done so far has been due to walkthroughs and the helpful responses to ...
3
votes
4answers
147 views

Remove IP with ip command in linux

If I add two IPs like this: ip addr add 1.1.1.1/24 dev eth2 ip addr add 1.1.1.2/24 dev eth2 and then I try to delete one of like this: ip addr del 1.1.1.2/24 dev eth2 BOTH IPs will be deleted ...
2
votes
1answer
2k views

DHCP fails in Ubuntu network install: DHCPDECLINE

I'm trying to do a network install of Ubuntu 12.04 on Cisco UCS C240 rack-mounted servers, using Cobbler for the provisioning. Cobbler is managing my DHCP server (ISC), which is configured to hand out ...
1
vote
1answer
59 views

Can arping by IP but not MAC address

I have an interface that I can arping to by its IP, but not its MAC address: # arping -i eth2 10.10.0.153 ARPING 10.10.0.153 60 bytes from 02:68:b3:29:da:98 (10.10.0.153): index=0 time=81.062 usec 60 ...
3
votes
1answer
1k views

Cannot find network subsystem in cgroup on Ubuntu 12.04 LTS

I'm trying to use cgroups to limit a process's network bandwidth, as described in this answer. However, I am unable to find the "files" they refer to. I am using Ubuntu 12.04 LTS with cgroup-bin ...
1
vote
2answers
184 views

Wrong Gateway assigned

Hello people of serverfault. I am currently running into some issues. Currently I have a total of 7 servers. 6 of them have Ubuntu 12.04. The other one is a clearos. Currently the clearos machine ...
0
votes
1answer
23 views

Apache workers upate

I would like to update 2 ubuntu(newest packages, fixes) servers which are balancer members(Apache) running on esxi as Virtual Machines with internal IP's and running on the internal network. What ...
1
vote
1answer
924 views

xen Dom0 network setup on ubuntu 12.04.1 LTS

I read a lot of tutorials (or at least try to be) but none is able to explain well how to configure networks for xen host. my Dom0 has two interfaces eth0 (real interfaces) and virbr0 (I guess was ...
1
vote
2answers
2k views

Problems bringing up a second virtual network interface

I'm having issues adding a second IP address to one interface. Below is my /etc/networking/interfaces # The loopback network interface auto lo iface lo inet loopback #eth0 is our main IP address ...
1
vote
2answers
808 views

Service networking restart not working on ubuntu

This one has been cracking my head for quite a bit and I can't seem to find a decent answer for it, hoping you guys can shed some light to it... # Loopback interface: auto lo iface lo inet loopback ...
1
vote
1answer
251 views

ubuntu 12.04 kvm virtual server network setup, can't get the machine to be connectable

I have worked on my Ubuntu Server host for weeks now and I just can not manage to get the virtual machines into the network.... here's what I need to do: I need to be able to create virtual machines ...
1
vote
1answer
736 views

HAProxy causing delay

I am trying to configure HAProxy to do load balancing for a custom webserver I created. Right now I am noticing an increasing delay with HAProxy as the size of the return message increases. For ...
0
votes
1answer
75 views

How to setup software and config file network state in Ubuntu 12.04?

I'm new to Ubuntu networking and I am wondering if there are methods for me to do the following with Ubuntu. Maintain Network users and a single network admin. Maintain Software state between ...
1
vote
2answers
659 views

Debian/Ubuntu - No network connection

I have a very weird situation on my Ubuntu 12.04 LTS Server. I can not access (ping) my gateway, although I believe my config is ok - I attach the outputs. Any hints where to look? (I changed the ...
5
votes
1answer
8k views

How do I set the dns search domain in Ubuntu 12.04?

/etc/resolv.conf is dynamically generated from the contents of /etc/network/interfaces, which on my system contains a line like this: dns-servers 8.8.8.8 How do I include the default search ...
2
votes
1answer
1k views

Ubuntu LDAP auth - offline cache / network init speed

I have configured LDAP auth for Ubuntu using this guide. The authentication works, but I have connection problems after reboot & suspend. Although the PC is configured using a static ip, after ...