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

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Windows 8.1 third party firewalls and Hyper-V virtual switch compatibility [closed]

I have the following problem: Hyper-V is installed on windows 8.1 with an external virtual switch. Everything works fine with windows firewall. When i try to install any third party firewall on ...
0
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3answers
167 views

VPN - What is the complexity involved setting one up across less than a dozen machines?

I have never set up and configured a VPN. I was wondering what it takes to set one up across windows server 2008 servers. What is the complexity involved? How complicated is it to configure? Do I ...
0
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2answers
53 views

Limiting IP access geographically

I don't want to cause any offence here, but whenever I take a look at the logs for my servers I can see I am constantly having IP addresses in China try to login to my machines, hoping to get access ...
0
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1answer
1k views

VPN - local and remote networks IP collision

I have created a VPN connection in Windows using the New Network Connection wizard that comes with Windows. It works without problems in most places, but there is one concrete place where, despite ...
0
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1answer
1k views

Can't resolve local IP using remote dns server

I'm trying to do something I thought would be pretty simple. Mapping local.mydomain.com to 192.168.0.1 using my registrar's DNS server.(namecheap.com) I've added an A Record for local with value of ...
1
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3answers
814 views

How to make same server IP accessible from multiple interfaces that are not bridged on Windows 2008 R2?

My server have two interfaces (e.g. A, B) that are not bridged. These interfaces have different IP adresses (e.g. 192.168.1.1, 10.0.0.1). These IP addresses are in different subnets. I need to ...
5
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3answers
3k views

Disable IPv6 address autoconfiguration on Windows XP

In Windows Vista and later versions, you can assign a static IPv6 address and the gateway to the interface via a GUI or alternatively with netsh. Addresses can also be statically configured on Windows ...
11
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1answer
221 views

SSH tunneling is faster than OpenVPN, could it be?

Logically, VPN should be faster than SSH for tunneling, because: It's running on UDP and not TCP (so no TCP over TCP) It has compression However, today I tested Redis replication over both ...
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1answer
67 views

Restrict shared folder access to specific computer/IP [closed]

How to configure a server [having DNS and ADS roles installed user account created/configured] to restrict its shared folder access to a specific computer in the network. Sol-1: Solution proposed ...
6
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3answers
6k views

iftop - how to generate text file with its output?

iftop is great tool to view almost live bandwidth usage distinguished by source-ip source-port destination-ip destination port. I'm using it to see which client's ip is using most bandwidth. Now I ...
4
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1answer
42 views

Ping time variation correlates with IP phones not working

We have an IP Phone system (most models are snom 320). Today someone's phone has decided to stop working. It has an IP address assigned to it by DHCP, and I can sometimes go to it's IP address to view ...
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1answer
2k views
0
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1answer
39 views

conflict in network interface configuration of CentOS 6.5

I am trying to create 2 network interfaces, one with DHCP and the other with static IP on a CentOS VM running on ESXi Server. Content of file ifcfg-eth0 is as follows: DEVICE=eth0 ONBOOT=yes ...
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0answers
87 views

Not getting ping My Local Network Domain xxx.local [closed]

My Domain OS is Server 2008 r2 with DNS and we have 200 PCs in Different VLANs, Currently my domain PCs Network shows xxx.local(Unauthenticated) also some time DHCP not providing IP address to Client ...
1
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1answer
887 views

Multiple Homed Windows 2008 Server / Windows 7 Client

I have a small Windows 2008 network, with some Windows 7 clients. The clients are both laptops with docking stations and I would like them to communicate with the Windows 2008 server (for filesharing) ...
1
vote
1answer
62 views

Inactive router on quagga

Im trying to connect 5 virtual machines using quagga but for some reason one of my virtual routers appears as inactive, when I use "show ip route" my router with IP "192.168.2.2" is inactive ...
1
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2answers
41 views

Use OpenVPN tun device for specific request

I have setup an OpenVPN connection with the route-nopull configuration. So now no special routes have been added to the client's configuration and only a TUN device is created, like so: tun0 ...
6
votes
7answers
258 views

Windows 7 computer: “No internet access”, can browse internet, can remote into it, cannot activate office 2013, cannot join domain

Like the title says, I've got a Windows 7 machine that connects to the network just fine, I can use it to browse the web, including https://officesetup.getmicrosoftkey.com/, I can connect to it via ...
0
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1answer
838 views

pfSense in VMWare Cannot Access Web Control

I'm running VMWare ESXi Free on a rented box. I have 2 physical NICs, 1 connected to the Internet, one connected to the Private Network in our DC. Each NIC is connected to a vSwitch and each vSwitch ...
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0answers
42 views

Mystery IP address attached to Windows Server

While scanning my network I came across a mysterious IP address which shows no open ports but responds to pings. It is in the range of static IPs I reserve for servers. When checking arp table of PC ...
0
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1answer
1k views

Deleting port on one openvswitch bridge causes change in MAC address on another bridge

I am trying to set an explicit MAC address on an openvswitch bridge named br-ex. I am running Fedora 20 and using the native ifdown/ifup commands to configure the bridge (details of my network ...
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votes
1answer
35 views

Windows redirect outgoing traffic

I need to redirect network traffic in a windows server which is destined to for example 111.111.111.111:100 to 222.222.222.222:100 This would be easy with iptables but cannot find any method how to ...
0
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0answers
23 views

How do I know the remaining buffer space?

There is a socket error 10055, meaning "No buffer space available". But what is this buffer space and how do I know, how much of it is still available? At the time I've got this error, the server had ...
1
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0answers
45 views

linux not replying to an arp request

I am running linux 3.14 on a system with 2 interfaces. on the first interface, i can access our local network. on the second interface, arp packets come in but linux doesn't send out reply. is it ...
2
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2answers
6k views

Network identified as public when multiple network adapters present

Adding a Windows 2012 Hyper-V server to the network. The server has five network cards. One is for the LAN and the other four are a private SAN network for MPIO. When the SAN1-4 network cards are ...
0
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0answers
12 views

OpenWRT: Software update wget returns “Network is unreachable” [migrated]

I have OpenWRT [Barrier Breaker 14.07 / LuCI Trunk (0.12+svn-r10530)] installed on a TP-Link Wifi Extender (TL-WA850RE v1), though acting like a simple Access Point, DHCP & DNS are provided by a ...
4
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0answers
61 views

Configure Juniper M320 as Ethernet/STM transparent converter

There is Juniper M320. We need to move ALL the traffic from one port to another. Everything that comes to one port goes to another and vice versa. No snooping or any other processing is required. One ...
0
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4answers
8k views

FTP/FTPS/SFTP/SCP - Speed comparison [closed]

How do FTP, FTPS, SFTP, and SCP compare in terms of transfer rate and how can I compare them through testing?
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0answers
35 views

openvpn rdp networking mystery : can connect HTTP cannot RDP, even with firewall off

I have 2 small networks joined using OpenVpn (routed configuration), lets call them A and B. on A, I have a test web server (IIS, Windows 2008R2 or Windows 2012 depending on test machine), lets call ...
0
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2answers
388 views

SQL server performance over long distance

Is it reasonable to expect decent performance from a SQL server connected via fiber private WAN - 5000 km's away. The carrier is telling us that this network is the 'best' possible, and will ...
0
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1answer
82 views

Linux Servers in same network unreachable from each other, but however reachable from outside

I have 5 servers in the same network with IPS X.X.X.110 - 114. They are all connected to a switch. I am able to reach all 5 of them from outside(internet). However, I cant connect from servers 0 - ...
2
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1answer
87 views

Windows Server 2012 R2 runs out of ephemeral ports, though it shouldn't

We are regularly experiencing strange issues with networking on our dedicated server. It runs Windows Server 2012 R2 x64 on Xeon E5620 with 16 GB RAM and Intel 82575EB network adapter. Please note ...
2
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2answers
231 views

Should a NAS with multiple ethernet ports be split across network devices

I'm adding a Synology DS 1513+ NAS to a small business network. The NAS has four ethernet ports for data transfer. The current network configuration has a modem in bridge mode, hooked up to a ...
0
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2answers
21 views

Cisco PIX 501 and jumbo frames

We currently have a cisco pix 501 running in our office building and we just got word that our network is going to updated to run jumbo frames. I haven't been able to find much information, but from ...
3
votes
4answers
2k views

Need help troubleshooting intermittant TCP timeout in HAProxy

I have an application where the client connects to a server via a simple TCP based protocol over TLS/SSL. In development, this has worked great for many months while we were building our application ...
0
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3answers
891 views

ipconfig slow to complete

Does anyone have any idea why ipconfig on Windows XP might take a 10-20 seconds to finish? It’s causing a timeout issue for me in an application.
0
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1answer
18 views

How to scan mails with amavis from other mailserver

I have two postfix mail servers mailserver1 is running amavis to scan spam and virus mails mailserver2 is running without amavis. My question is how is the smartest way to use mailserver1 ...
0
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0answers
23 views

Equivalent to TYPE=“OVSPort” DEVICETYPE=“ovs” OVS_BRIDGE=br-ex in Ubuntu 14.04?

Is there an equivalent to TYPE="OVSPort" DEVICETYPE="ovs" OVS_BRIDGE=br-ex in Ubuntu 14.04? The system is OpenStack Icehouse with 3 nodes (controller, network, compute1) each on a VirtualBox Ubuntu ...
8
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5answers
10k views

Network Error: no buffer space available

After some time of running fine, one of our Windows XP SP3 machines does not open some(!) new TCP/IP connections anymore. Putty says Network Error: no buffer space available, IE won't open any new ...
3
votes
1answer
1k views

Unable to make work both private and public ip network on openvz container in Proxmox

I'm using Proxmox 3, it is a fresh installation. For those who know, I'm using OVH Vrack 1.5 (along with a previous Vrack 1.0). My server has two interface eth0 and eth1, I succeeded to configure ...
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0answers
12 views

Is virtualbox birdged adapter slower than NAT? [migrated]

I use samba server to share files between ubuntu and windows 7. The samba requires the Windows 7 and Ubuntu must be in same net section (eg. 192.168.0.108 and 192.168.0.125) in this way the samba ...
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0answers
35 views

DFSR speed Server 2008r2

So, here’s the simple setup: 2 sites, each with their own file server (server standard 2008r2 fully updated) 100MB WAN link at each site 1.7TB shared drive Replication schedule 64Mbps at night and ...
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votes
1answer
21 views

is host id size of IP address will vary between the private and public networks? [duplicate]

I understood that size of host id in the class c network is 8 bits(1 Octet) Classful network After started exploring about private networks, in the below link Private network The host id size of ...
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votes
1answer
51 views

Is this a switch loop?

I have a quesion regarding creating switch loops. I have 1 server with 2 network cards (nic1 and nic2) and 2 switches (sw1 and sw2) Question: Am I creating a switch loop if I connect nic1 to sw1 and ...
0
votes
1answer
76 views

How to assign different static IP addresses to the same machine depending on its OS on a network? [closed]

I was wondering if it is possible, e.g. to assign/reserve one static IP to a computer when it's running windows and assign a second static IP to the same computer/MAC address when it's running Linux? ...
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1answer
14 views

Brocade FCX648-I In password recovery process

Brocade FCX648-I In password recovery process I get to a Monitor> prompt. The password recovery instructions tell me to assign a new password at this point but doesn't tell me how. There is a link to ...
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1answer
40 views

can't ssh into KVM VM despite using bridged network

I'm trying to access a KVM virtual machine running inside my company's network. I am VPN'ed into the network from my laptop and can ssh into other VMs, and I set up my VM to use a bridged network for ...
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2answers
35 views

Restrict SSH access to whitelist IP - what is stopping someone pretending to be from my IP? [closed]

I know I can whitelist a client IP for connecting to SSH on server and then Deny All other IPs. However, seeing as how the packet arriving at the server network interface must include the IP, what is ...
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0answers
63 views

Can I install an internet connection on a small town? What would I need? How much would it cost? [closed]

Here is the problem. 3,000 people with no internet or internet very slow. Here is what I want to do. Give them free or almost free internet based on how much money they make or have. Can I do it? ...
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1answer
2k views

Error while bringing up eth1

I'm getting this error while bringing up my network card: (process:2550): WARNING **: _nm_object_get_property: Error getting 'State' for /org/freedesktop/NetworkManager/ActiveConnection/3: (19) ...