Networking refers to the technologies and techniques that enable the interconnection of devices and applications allowing them to communicate electronically.

learn more… | top users | synonyms (1)

0
votes
0answers
3 views

How can I use instance discovery with openStack?

I'd like to use a service like TADDM to discover OpenStack instances. Unfortunately, this is tricky since OpenStack instances use private IPs. What are ways I can use to quickly distribute public IPs ...
-1
votes
0answers
14 views

A network issue most vexing

Here's the basic setup: I have a Linode VPS in the cloud, as one does. I also have a machine at home, again, as one does. Using an online trace route service (this one, if it matters), I'm seeing ...
0
votes
1answer
13 views

How to configure my linksys ES6900 as cascading router?

I have a Linksys 6900 router and Amped-Wireless Access Point. My network is currently setup like so Modem > Router > Access Point I need to change that so that the Access Point will be the in ...
0
votes
2answers
21 views

Printer not reachable in network

i've a low-cost printer Samsung i provided to configure in my network. i gave it a static IP and connected to my AP. i can ping (and use) the printer only if i'm connected to the same AP. why can't i ...
0
votes
2answers
22 views

Can't access particular website on Windows Server, but ping works

In my Windows Server hosted in AWS, I tried to access a particular site from Chrome/IE and both browsers returned - the site can't be reached/the server refused to connect. However, when I try to ping ...
-1
votes
0answers
6 views

How to use nagios to monitor a pfServer server?

I have a pfSense server set up as firewall gateway for my lab lan and dmz. Now I installed Nagios monitoring manager on a Linux server in lan and want to add a host target for the pfSense firewall. ...
-2
votes
0answers
15 views

Configure VLAN on desktop using intel server network adapter [on hold]

I have an old Intel pro/1000 PT quad port installed in my desktop computer Windows 8.1 Pro. All ports works great, but i want to manage VLAN. I've read that was possible with Vista, but became ...
0
votes
1answer
20 views

public interface not listening by default centos 7

I have two NIC on my system with centos 7 as OS. One interface is public with ip 172.68.122.120 (em1) and second with ip 10.11.15.20 (p4p1). Now When I reboot my system, bydefault, public ip is not ...
0
votes
0answers
25 views

How can I acces owncloud from LAN and from WAN at the same time? [on hold]

I am new on networking, at the moment I am trying to mount an Owncloud server in a raspberry Pi 2, I follow some tutorials Pi my life up and htpcguides. My network topology is : Internet -> ISP Modem ...
-3
votes
0answers
40 views

Can I get a speed increase? [on hold]

Due to downsizing I am forced to take over other tasks. Am I missing an opportunity for a speed increase in the following set up? 24 devices ( dedicated devices with SD card storage ) with 100Mbps ...
0
votes
1answer
52 views
+50

Access Point Iptable/Route rule for allowing device discovery? Devices can connect manually, but not automatically. Multicast/Upnp issue?

I setup a wireless access point on my server and for some reason, everything works but automatic discovery features. I can't see any other devices, upnp devives aren't discovered, and I think it's a ...
2
votes
1answer
31 views

Internal network DNS can't be configed to route domain.com to www.domain.com?

We host a domain on the internet that is accessible outside of our internal network using domain.com or www.domain.com, but is our actual internal network domain as well, but the external website is ...
0
votes
0answers
18 views

Network issue in Compute node instance

We have two servers with Openstack Essex. Controller node a. nova-compute, nova-network, nova-volume, nova-consoleauth, nova-cert, nova-scheduler installed Compute node a. nova-compute and ...
0
votes
0answers
41 views

“No route to host” when i do a telnet in azure

I have two VM's in azure with different public IP's and whose private IP's are : 10.10.1.9 10.10.1.6 When i do a telnet with following command from the server 10.10.1.6, i get the a error: telnet ...
0
votes
1answer
43 views

Renewing public dynamic IP via Powershell ?- Azure Resource Manager

i need your help! I'm trying to renew a dynamic IP assigned to a VM, but i want to figure it out if there's some possibility to accomplish this via powershell cmdlets without being in the need of ...
-1
votes
0answers
15 views

VirtualBox natnetwork guest ip address WITHOUT guest additions installed [on hold]

How can I get the dynamically DHCP-assigned IP address of a VirtualBox natnetwork guest WITHOUT guest additions installed?
0
votes
1answer
20 views

Basic Vlan questions

I've been "awarded" with IT infrastructure manager possition as I'm the "good with computers" guy in my small office. Nedless to say they have made a huge mistake, I have no clue.... I'd like to ask ...
1
vote
1answer
29 views

Azure vpn is establish but causing delay or no traffic sometimes

We are trying to establish VPN Hillstone FW (device) with Azure. VPN details are: VPN type: Policy based Gateway Subnet: 192.168.50.10/29 default subnet: 192.168.50.0/29 VM inet Address: ...
1
vote
3answers
98 views

Forward traffic between VLANs with iptables

We're having the following 4 VLANs on my network, connected to an Ubuntu Linux box with DHCP. This Linux should act as the L3 router as well. VLAN 10 on interface eth1.10 with subnet 10.10.10.0/24 ...
0
votes
1answer
28 views

CentOS 6.7 vm static external IP setup issue

I have a vm setup and have setup like my CentOS 5.5. It is a strange setup since we used Comcast Gateway as the router and I really don't want to change that since we're Mac and Apple routers only ...
-2
votes
1answer
72 views

Any tool for forking/teeing/sharing a TCP connection to the remote server? [on hold]

Could down voter please post your reason, as it's not obvious to me? Here's my problem. I'm building an automation program that talks to a remote server (think of it as a chat server or MUD game ...
0
votes
0answers
10 views

Firewall-Rules on Proxmox-Node cause VPS to be offline

I'm using proxmox to virtualize some small machines based on KVM. To do so I created the following network-config on the KVM-VPS: # This file describes the network interfaces available on your ...
1
vote
1answer
25 views

configure docker network bridge IP for multiple IP alias

I got a Ubuntu host with multiple IP address aliases and I want to expose the ports from docker containers connected to one docker network bridge to a specific IP address of the host and the ports ...
0
votes
0answers
10 views

What is the default value for TCP accept queue length on Linux?

I have read this article but it doesn't mention where the default accept queue length can be found (it does mention tcp_max_syn_backlog though, but it's different). I'm working on a Java 8 project ...
0
votes
0answers
18 views

captive portal on a router for guest acess to WiFI [on hold]

I'm setting up a WiFI network in a snmall boutique hotel using ubiquiti uap-ac-3 AP's and a managed ubiquiti tough switch. I would like to set up an internal webpage with captive portal so customers ...
-1
votes
0answers
7 views

LDAP Server cant talk with network printer

Recently we replace network printer hardware fuji xerox with another model and we put same configuration as like before but in new print server having issues connecting with LDAP server user cant go ...
-3
votes
0answers
42 views

Viewing current network connections/traffic in real time, inside a datacenter/cloud [closed]

Context I am starring blankly at my list of instances on Amazon. Hundreds and hundreds of computers in the wild, talking to each other. At least that's what I suppose. The truth is I don't really ...
-1
votes
0answers
11 views

How to start ubuntu server with wireless Internet connection? [closed]

I have an Ubuntu Server 14.04 installed on my system. Whenever it boots up, it requires a wired connection from a router to complete the boot process. If the connection is not present, it waits for ...
0
votes
0answers
12 views

Route to Internet router from different subnet [closed]

I ran into a situation where my network is setup like the following: my network In this image my Computer A is connected with WiFi DSL router which is connected to the Internet. Computer A and B are ...
0
votes
0answers
19 views

Large payload - connection get's Hung with CLOSE_WAIT or LAST_ACK state

We have a webservice client which posts data to a 3rd party Webservice. We are having an issue when the payload is a bit large (Around 600KB) xml. Once we pay the process hangs forever. The Netstat ...
0
votes
1answer
58 views

Multiple Gateways for Single Subnet

Right, this might be a long one, so bare with me... I have 2 machines, lets call them local1 and cloud1. local1 has 3 Nics: 2 connected directly to cable modems with public IPS (call them eth0 and ...
0
votes
1answer
28 views

proFTPD unable to connect after update ECONNREFUSED

I am working on Debian 8 - ran a series of automated system updates and now I am unable to connect to my local server running proFTPD. I have made no changes to the client attempting to connect to ...
-6
votes
0answers
53 views

Win Server 2012: Keep Network mapped drive mapped at all times

I'm trying to get the backup working for valuable client data, I have a server that is hosting client data, and are using Microsoft OneDrive as a Mapped drive... But I think the task scheduler is ...
0
votes
0answers
24 views

LXC containers cannot connect outside of VM

I have two CentOS 7 LXC containers on a RHEL 7.2 VM using virbr0 as a virtual bridge. Originally, container1 could connect out and do e.g. yum installations, but after I created container2, neither ...
2
votes
0answers
35 views

Possible to force TCP window scaling to a higher value?

Is it possible to increase the TCP window scaling factor on Linux (CentOS 7.2)? I have a long fat network (100 Mbps) from London to Chicago and I'm getting 16 Mbps throughput in TCP on an sftp from a ...
3
votes
1answer
69 views

HP ProLiant BL460C Gen9 - NICs

Is there a way to get more than 4 physical NICs (4 active/4 standby) on an HP BL460c Gen9 server WITHOUT using mezzanine cards and extra VCMs? EDIT for more information: I have two c7000 enclosures. ...
0
votes
0answers
16 views

Using the host inet address to connect containers

Running an Ubuntu 16.04 server as a docker host. One of the services I start has the following run script. #!/bin/bash # retrieving the inet address INET=`LANG=c ifconfig | grep -B1 "inet addr" | ...
-1
votes
1answer
41 views

How can I connect a group of vms in Azure?

I have a number of Azure Linux VMs. I am able to ssh into all of them using the public azure connection info, however I am not able to ssh from one vm into another vm using the private info. I have ...
1
vote
1answer
40 views

Slow file transfer speeds

I have a server that is running Ubuntu Server 14.04LTS and I am currently experiencing slow network transfer speeds. This server had been running without issue now for about 2 years and suddenly I am ...
0
votes
1answer
35 views

libvirt: set hostname using dhcp in virtual network

I've configured a host-only (aka private) network for a group of VMs on a CentOS 7 host. I've created static leases in the DHCP section for the virtual network. The IP address is getting set ...
0
votes
0answers
62 views

IPv6 not working

I'm unsure as to why this is happening... anyway, let me start from the beginning The Setup 1 * Dedicated server with a /29 IPv4 and /48 IPv6 (from Nocix (DataShack)) 1 * CentOS 7 KVM host 1 * ...
-2
votes
0answers
33 views

Port forwarding/ssh [closed]

I have a question about port forwarding. In my case - I need serverB to be able to communicate with serverA over port 9090. The problem is that serverB can't not connect to serverA over this port. ...
-1
votes
0answers
13 views

Is Weave the only Docker overlay network that supports multi-hop routing?

One of the features of the overlay network Weave is the support of hop-routing. I couldn't find any other Docker overlay networks that support this feature. Not even Docker's native networking library ...
2
votes
1answer
94 views

Tune windows for high latency/high bandwidth tcp transfers

How can I speed up my Windows 7 tcp file transfers over a 100 mbps link between Chicago and London? Right now, I am transferring two 4GB files in two sftp sessions. Each file transfer is running at a ...
1
vote
2answers
57 views

Can't ping between two VMs

I have two VMs that, up until yesterday, have been able to talk to each other just fine. Now they don't. I've been trying to get this fixed for several hours now, but haven't been able to figure ...
0
votes
0answers
13 views

PPTPD VPN Can't connect to the internet

I'm running a Ubuntu 16.04 Server on a VMWare ESXI Server with its own public IP, I have setup a pptpd vpn server which works but only with connected devices. I can't connect to the internet with it ...
0
votes
1answer
51 views

Network maps, best admin practises and how them saved your ass?

I am reviewing the security of a (quite large) network. There are a some thousands switches, several hundred routers, several hundred access points, tenths of FW, IPS, and so on. PCs and servers are ...
0
votes
1answer
55 views

How to secure dual-homed Windows Servers that are connected to the internet

We have two machines running windows server 2012. Both have one NIC port connected to the public internet and another NIC port connected to a switch with internal IPs (192.168...). What is the most ...
2
votes
3answers
42 views

VisualSVN server visible on internet, but not all subcommands work on client

So my boss is a nice guy who's open to trying new ideas, and I talked him into letting me start new projects on svn (instead of an older version control system). At this time, we've realized that it's ...
-2
votes
1answer
28 views

Can I create an Ad-Hoc network between NAT virtual machines and computers/virtual-machines external to host? [closed]

I want to create a network between virtual machines on my laptop which are running Windows Server and other virtual machines in another laptop that will be running Windows Server as well without using ...