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

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30 views

Identify The Source of Networking Spikes [closed]

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
32 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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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: ...
1
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2answers
17 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 ...
1
vote
1answer
41 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
19 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
votes
1answer
35 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
12 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 ...
1
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0answers
9 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
votes
3answers
88 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
votes
1answer
27 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
votes
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
46 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
votes
1answer
13 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 ...
1
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0answers
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 ...
16
votes
3answers
1k 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 ...
1
vote
0answers
40 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 ...
2
votes
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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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
votes
1answer
24 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 ...
-1
votes
0answers
23 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
18 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
votes
1answer
99 views

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
70 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
votes
0answers
13 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 ...
0
votes
1answer
26 views

serving html remotely from mac os x [closed]

TL;DR: simple HTTP server is accessible locally, but how can I make it available remotely in order to view the served files from another computer on the network? I'm using a zero-configuration ...
0
votes
1answer
19 views

Troubleshooting poor point to point (over internet) bandwidth between two machines

My problem started out as poor bandwidth between a 64 bit Win 7 Home OpenVPN server in location A (Northern Europe) and a Win 7 or Linux Client in location B (Southern Europe). Location A has FTTC ...
0
votes
1answer
34 views

Custom Live Boot PXE ISO Script

Currently I am using an open source PC auditing software called Open-Audit to audit PCs my company receives off lease from school districts. The software uses snmap to pull hardware information over a ...
2
votes
1answer
18 views

How to check SSL connectivity between certificates installed on two different server

Suppose there are two organizations which share information with each other. Every organization installs SSL certificate in their application server and provides the same certificate to other ...
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0answers
23 views

Host Became Inaccessible

A strange thing happened recently. I have a few servers that have statics IP's and I can not longer access the servers. I cannot ping or trace them. However, I can go to their web portals. Each server ...
0
votes
1answer
31 views

ipv6 static routing is not working

wondering ipv6 static route default route nothing working, only can ping the directly connected interface, but sh run command gave the static routes which I created to other networks, but on the sh ...
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votes
1answer
27 views

Why do network connections hang? [closed]

We've all had the experience: you click on a link, and your browser just... sits there. After 10-15 seconds the page might eventually load, but it's usually the case that if you just stop the page and ...
0
votes
2answers
37 views

Routing DNS requests via DNSMASQ [duplicate]

Ubuntu 14.04 | dnsmasq My goal is to setup a catch-all HTTP server using an Ubuntu 14.04 workstation as DNS resolver. I have installed dnsmasq on my Ubuntu 14.04 OS using apt-get install dnsmasq and ...
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votes
1answer
44 views

Which VLAN should a secondary server NIC go on?

We have just upgraded our SAN backend with 10 Gbps connectivity and we have a few Windows servers that currently use a 1 Gbps connection, which we would like to upgrade by adding 10 Gbps NICs to. Part ...
0
votes
0answers
11 views

WiFi range extender drops connection after a day. Rebooting main router fixes it [migrated]

I have an issue which I can't seem to get to the bottom of. My main router works great, but to increase the range I recently added a WiFi range extender. The range extender was easy to set up, and ...
1
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0answers
36 views

Automounted AFP home directories are owned by root (OS X Yosemite client, Linux Servers)

What I am trying to do but can't get to work I am trying to set up network users in Yosemite clients with their home directories on kerberised AFP. I am using automountd to have the home directories ...
-6
votes
1answer
13 views

Finding device network disconnection location (which hop failed) [closed]

If you can't connect to the internet and you know the problem is as simple as one of your devices being disconnected along the line which of the following would you use to find out which? You also ...
0
votes
0answers
17 views

GeoServer Slowly Requests to Remote DB

I have two servers, one for database (S1) and the other one for my web app & GeoServer (S2). Both inside network A. Application works fine on S2. Retrieving WMS and GWC layers from S1 through ...
0
votes
0answers
21 views

Setting up veth in proxmox

I have recently taken over an openvz stack from an admin that left, and I am having problems with veth interfaces. There are 3 CTs using the bridge vmbr0 in the stack, with their own public IP ...
0
votes
0answers
11 views

Direct Access Stacking network filter driver before iphttpsinterface

Is there any way I can stack up my NDIS filter driver on top of iphttpsinterface, which is a virtual tunnel adapter provided by Microsoft for Direct Access. With this, I would like network traffic ...
0
votes
0answers
6 views

SUSE 12 setting up virtual network interface [migrated]

I'm struggling to setup virtual eth interface on Suse 12 When I run: ipconfig eth0:1 10.0.0.2 netmask 255.255.255.0 Output from ifconfig is as expected: eth0 Link encap:Ethernet HWaddr ...
0
votes
0answers
26 views

Can not ping from Ubuntu VM but can to

I've got an XenServer with an pfsense Router Running on it. There are the following Networks: Lan: 10.0.0.0/24 DMZ: 10.0.1.0/24 Secure: 10.0.2.0/24 WAN: xxx I got 2 Windows VMs inside LAN: ...
3
votes
1answer
198 views

Very slow network file transfers

For some reason, our network is very very slow when it comes to transferring files internally thru LAN (gig). Some numbers: C:\iperf-2.0.5-3-win32>iperf.exe -c 192.168.100.12 -w 256k ...
0
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0answers
41 views

How to deploy single OpenVPN server instance with multiple unique “--config server*.conf” profiles?

How to deploy Single OpenVPN server instance with Multiple unique --config server*.conf profiles as service start|restart parameter ? Would you please share any tips to run one single Openvpn server ...
6
votes
1answer
274 views

Do ESXi vSwitches have their own mac address?

I'm in the process of trying to decommission a few subnets which are believed to be no longer in use. When I query the mac address table on the physical switch for the vlans associated with these ...
0
votes
1answer
24 views

Internet access on debian using external gateway

I've checked online for a solution to this but not having any joy, i'm sure it's pretty simple to fix as well. I did find http://serverfault.com/questions/ask?title=debian%20private%20gateway which I ...
1
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0answers
31 views

Trunk vlans inside openvz container (Proxmox)

I have a node running OpenVZ CT (ProxMox). eth1 on HN are bridged through vmbr1 to veth device on CT101 (eth1 inside container). (Host Node) eth1 -> vmbr1 <- veth101.1 <- eth1 (CT101) No ...