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

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Connected to Internet but can't load certain page

For some reason I can't connect to a certain site...I've checked whether it's up or not by searching for the "is a website down" test and the result said the site I wanted to go to was UP. I can ...
0
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0answers
16 views

Network Config: Difference between Windows and Debian

We have a so called "LAB"-Network(VLAN). The Switch and Firewall are configured to allow access from the ip 10.150.151.1(Windows Client in LAB) and 10.150.151.10(Debian Client in LAB) to a mail ...
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1answer
27 views

Select source IP on windows server 2012 with multiple IPs on 1 NIC

I have searched a lot for a solution to this case but I couldn't find any. So, any help would be appreciated. I have a windows server 2012 with 1 NIC having 2 IPs bound to it 37.188.120.8 and ...
9
votes
1answer
111 views

Should I use link-local addresses where a non-routable, internal IP address is required?

I have a network appliance which contains some load balancing features - in my design, these features are only for use internally within the appliance. Nothing should EVER speak to them externally ...
1
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2answers
24 views

Setting up a network for a Host Server and it's Guest OS

Is there a standard as to how one sets up networking on a Server Host that will have virtual servers within? In the past I've used virtualmin and set up the nic to have multiple alias such as eth0:1 ...
1
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0answers
13 views

Setting up a new DMZ for Web Servers

When it comes to security, VLAN ACL's, firewall DMZ policy and the like I am a Newb. So any help will be appreciated. We are trying to architect our network to place all of our web accessible ...
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0answers
8 views

Can I manually define a Wireless Portable Devices firewall predefined rule?

I want to connect my portable device to my Windows Server 2008 R2 via Wi-Fi. After enabling ports and services, I am still unable to connect, most likely because I am unable to modify the predefined ...
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1answer
19 views

Is it possible to change wireless router BSSID? [on hold]

I suspect someone is trying to hack our wireless network. I've stopped broadcasting the SSID, but assuming they've already attempted to gain access in the past they could have the BSSID stored, which ...
0
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0answers
27 views

Removing The Server [on hold]

Good morning every one, im looking for a little advice if possible please. Im not new to IT but I haven't really dealt with anything too in depth on the server before. We have a server running ...
-3
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0answers
20 views

Which flags should I use for my “netstat” commands? [migrated]

I would like to use two variants of the netstat command, one for exclusively IPv4 and the other for exclusively IPv6 traffic. For both commands I would only like to list the following information. ...
0
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1answer
15 views

Networking Cat5 Jack [on hold]

Can a cat5 wall jack transmit data both ways or is the connection only an output from the jack. I have a router hooked in to a cat5 wall jack that runs to a switch the switch is connected to two ...
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0answers
12 views

how to bridge two network interfaces to access guest ubuntu server [on hold]

I am running ubuntu as guest inside virtualbox on osx host. There are 2 network cards configured: That allows me to work localy through a fixed IP and in the same time access internet on the ...
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1answer
28 views

Cater to multiple countries? [on hold]

I run a game server off a linux machine with a single IP address masked by a proxy. The box is located in an LA datacenter, and for players in some other countries, they experience a high ping ...
1
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0answers
15 views

how to overcome conflict between 2 network cards - virtualbox ubuntu [migrated]

I am running ubuntu 10.4.04 LTS as guest in virtualbox on OSX Yosemite. Unfortunatelly I seem to have the network configured wrong I followed this tutorials ...
4
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0answers
69 views

Why would you internally use NAT? [on hold]

I work at a fairly huge company as a software engineer and I would like to understand why an enterprise would internally use NAT. We have several data centers, somewhat geographically close to each ...
2
votes
1answer
54 views

A local IP address (RFC 1918) on my network that is not … local

I've noticed an IP address today on my network (192.168.15.1) which when visited actually goes to a page that has a router webconfig page (Not my router) The puzzling thing is that i tried traceroute ...
1
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0answers
15 views

A local IP address (RFC 1918) on my network that is not … local .. [duplicate]

I've noticed an IP address today on my network (192.168.15.1) which when visited actually goes to a page that has a router webconfig page (Not my router) The puzzling thing is that i tried traceroute ...
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0answers
29 views

Identify The Source of Networking Spikes [on hold]

I have been getting some crazy network spikes ranging from 300 - 1200Mbps. The machine hosts a WAMP server, which serves some low traffic websites. These spikes will effectively kill my network - for ...
3
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3answers
31 views

Can't consistently ping both networks of multihomed host

I have a host which is multihomed, eth0 is on 172.31.254.0/24 and eth0.10 is on 172.31.253.0/24 . Obviously eth0.10 is a subinterface on vlan id 10. From this host I can succesfully ping hosts on ...
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0answers
17 views

Internet Usage Monitoring [on hold]

I have a WiFi enabled ADSL Modem/Router (ASUS DSL-N10) connected to some devices (PC, Mobile, ...). It's connected to internet via Cable or WiFi through this Modem. I need to monitor traffic used by ...
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votes
1answer
11 views

Addresses overlapping

I was putting somes static addresses to my interfaces then it shows me this: 172.16.1.0 overlaps with FastEthernet 0/0 What does it mean when two addresses overlaps and how can we avoid it? EDIT: ...
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2answers
16 views

Invoke-WebRequest timeout if NIC 1 disconnected

I have a windows pc with three network interfaces. One is a UMTS modem and the two others are lokal networks and one network has connection to the internet. Invoke-WebRequest ...
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1answer
34 views

Hyper-V virtual machine upload speed unbelievably slow

I have the weirdest problem I was hoping you could help me with. I've got a dedicated Server 2012R2 server with an Intel 82580 network adapter. It runs a couple of VMs in Hyper-V that are attached to ...
0
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0answers
23 views

MySql JDBC - java.net.ConnectException: Connection refused, can't see why [duplicate]

I have a test environment with MySQL 5.6 server running on a Windows machine and a Linux machine running a webserver. When I start the webserver it tries to connect to MySQL via: ...
2
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0answers
16 views

How do I enforce preferential routes with BGP & Quagga?

I have two routers that I'm setting up currently and they will be feeding my network of servers with a private AS number provided by the datacentre. What I want to do is provide both a VRRP failover ...
0
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0answers
4 views

Implement QoS on home network (maybe using a Synology NAS) [migrated]

My home router (Technicolor TG784n v3, firmware version 8.G.M.1) has no Quality of Service (QoS) settings. Still, I would like to implement QoS, mainly to be able to control bandwidth occupancy by ...
0
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1answer
31 views

How to limit outgoing traffic per IP Address using Linux TC

I want to limit outgoing traffic per IP address. For example I have a network interface eth0, having 1Gbps of bandwidth. I want to limit the whole network interface to 1Mbps each destination IP ...
0
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0answers
18 views

Linux - iptables - get youtube streaming bytes usage [on hold]

How do i get bytes usage using iptables for particular IP for all data usage including youtube streaming videos Currently i am using following IP tables rule to get data usage by particular IP ...
0
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0answers
9 views

Deny DHCP-Requests for specific subnets on specific interfaces

I have a router (Ubuntu 14.04) running the isc-dhcpd-server on the interfaces em2.X (X can be any of the VLANs 2, 3, 4). Each interface has its own 192.168.X.0/24 subnet. Now I have a Windows-Client ...
0
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0answers
8 views

How to connect to my other home network? [migrated]

I have an ADSL modem from my ISP. I have another Tenda router that is connected to the ADSL modem via twisted pair cable. I connect to the internet using Wifi from the Tenda router. The ip address of ...
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0answers
8 views

Firebox x700 Reset to Default Not Working

I found a site that explains how to reset a Firebox 700 series back to default as you can see from this link: https://www.hashdoc.com/documents/7502/how-to-default-a-watchguard-firebox-700-or-x700 ...
0
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3answers
87 views

Mess of a system : Where to start? [closed]

I just started a role as the sole "IT guy" in a company of over a hundred people. This is a company that has had a troubled history with IT, managing to go through 6 people in as many years. During ...
0
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1answer
18 views

Unstable connectivity on Ubuntu server 14.04 with two network adapters

I'm experiencing a weird behaviour on my server. It is a virtual machine, running on ESXi which is hosted on a "so you start server" from OVH. i want the virtual machine to have two network adapters: ...
0
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1answer
15 views

voice vs data device authentication

When a device is plugged into a switch (let's say, a Cisco Catalyst switch) how does a switch know whether the device is a VoIP one - and subject to being placed into the voice VLAN - or some other ...
0
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2answers
44 views

Http Requests: how to identify a machine using multiple IP addresses

I have an http server. Is it possible to identify a machine, which is making http requests to my http server using different IP addresses? In other words, is it possible to identify a machine, by ...
0
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1answer
12 views

Openning an RTSP port in linux

I want to check if a client can access a server via rtsp://192.168.1.5:554. As you can see the rtsp protocol and port #554 must be open and working on the server. Can I add iptables -A INPUT -m ...
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17 views

Run application from network drive takes long

This problem started recently, and I wasn't able to find a solution. Not even formatting solved. We have a program on our network drive and the Whole company accesses to this single exe. Usually the ...
15
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3answers
868 views

Is it possible to SSH access a server with a misconfigured subnet?

We have a server where one of our engineers misconfigured the subnet and now we are locked out of this server and the only access that I know of would work is a serial console from IDC (it means ...
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0answers
31 views

Event id 4227 tcp/ip warnings on Windows 7

We're deploying a new image out to the field, and we're seeing tcp/ip event id 4227 warnings periodically throughout the day (1-3 a day). The event message reads as follows: TCP/IP failed to ...
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0answers
13 views

Open Vpn is connected in Windows 8.1 pro but ip is not changed [closed]

I run openvpn-gui as administrator. I got assigned ip from the server but my ip is not changed. any idea why?
2
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1answer
49 views

VMware Vsphere Monitoring and Alerting Network Outage

I am trying to set up an alert to email out when any of our VMs lose network connectivity. I'm trying the following settings but I do not get any alerts when I kill the network connection. Alarm ...
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votes
1answer
17 views

Server stuck with default static IP from router and won't set to anything else [closed]

I'm green when it comes to networking and in need of help. I have a simple ISP modem going into a Netgear router WNDR3400v3. Then I have this server connected to the Netgear router. The Netgear ...
0
votes
1answer
31 views

Deny some local ip address to unknow devices [closed]

My company network has this subnet mask: 10.0.0.0/16. I reserved first 255 addresses to servers (10.0.0.1-10.0.0.255) and all other to clients and other network devices. In particular my dhcp server ...
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0answers
10 views

Windows 8.1 Suddenly Ignores Hosts File [migrated]

Good evening. After hours of research regarding the given topic and no working results until now I came here. I know that the problem of ignored hosts files on Windows platforms is a known issue. ...
2
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1answer
20 views

Virtual interfaces with different MAC addresses

I try to figure out how to set up two logical network interfaces (at one physical interface) with separate MAC addresses on a Linux machine. My first attempt was to use macvlan which seemed to work ...
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0answers
21 views

Snort alerts analysis (web interface)

I have a question about Snort (or maybe any other IDS/IPS, any working solutions would be ok). The goal is to set up some web interface providing a way to view the whole TCP stream packets of each ...
0
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0answers
16 views

Is 'offline files' the cause of my network problems?

I have inherited the responsibility of a network with 4 virtual Windows 2008 R2 servers and 25 clients. Users work a great deal with files on a share on one of the servers. They often make one or more ...
2
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1answer
74 views
+50

Network WAN load-balancing over Multiple Firewalls

Currently we have a Cisco ISA570 Firewall which does failover load-balancing between two ISP links. I would like to get a Sonicwall NSA6000 which should be primary and the ISA570 as a failover ...
0
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2answers
68 views

Odd Network Cable Color Coding Sequence

I just got hired into a new company where no IT has been before. My first task was to identify the possible problems. This is what I first saw, when checking on the cables connected to the switch, I ...
0
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0answers
12 views

OpenVZ container(s) and NAT

I have been trying to days to solve my NAT issue with OpenVZ. I have used their guide on their website/wiki, however I just seem to be unable to get it to work. My Linux box is running on CentOS 6 ...