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

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BIND failing to resolve with 'WARNING: recursion requested but not available'

there are no errors in the logs and query logging won't initialize iptables is fully disabled but the server will respond with "WARNING: recursion requested but not available" because my client ...
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1answer
40 views

Routing from VLAN to Internet via L3 Switch

Please excuse the brain-dump - trying to solve a problem that's had be running around in circles for an entire day! TL;DR - Clients on two networks separated by a L3 switch can see and ping ...
4
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2answers
487 views

Will blocking port 25 on a router cripple outlook clients?

I work at a small ISP, we manage about 60 buildings with p2p radios and a main cisco router at a central location. Recently we were notified that a phishing domain is associated with one of our IPs. ...
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2answers
25 views

Software installation by group policy

I have a server with windows 2008 r2, it is connected N client. Clients use software that releases updates. Is there an application that I install on the server, which allows you to select the ...
-4
votes
2answers
21 views

How to get forwarded with ssh [closed]

Let's say I, I know somebody's host IP-Address and the IP-Address of some lxc-container which is running on this system. When I only have the password for the user of this lxc-container and not the ...
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2answers
65 views

Forwarding HTTPs requests to another webserver

I have an Ubuntu 12.04 Server connected to two subnets. Eth0 is 20.20.20.1, it hosts an Apache Web Server on port 80. Eth1 is dynamic IP address in 10.10.10.0 subnet. This server is not a gateway ...
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0answers
18 views

Oracle VM Generating High Network Traffic [closed]

We Have IBM Blade Placed at Cloud Location and Connectivity Between our office and Cloud location is through dedicated 6 Mbps network (Layer-2) On IBM Blade Windows 2012 Server with Hyper-V. We have ...
0
votes
1answer
84 views

Is this a botnet? [closed]

I manage networking equipment at a small ISP for 60 highrise buildings. Each building has anywhere from 1 to 60 24 port switches, or some DSLAMs, or some coax gateways, with p2p radios on the roof, ...
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0answers
58 views

iSCSI connection drops frequently - Synology NAS

I have a Windows 2012 R2 Server connected through iSCSI to my Synology Rackstation 2414+. The problem is that the connection drops very very frequently, up to 10 times a day (manually restored ...
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1answer
37 views

UDP Proxy with cloned packets

Having UDP messages sent from dynamic public IP periodically to public IP X:20000. Need a proxy that listens in IP X:20000, then forwards duplicate/clone packets to X:20001 and a different machine ...
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1answer
37 views

Can't set up the default route from a sublan to the WAN [closed]

I am trying to connect one of my PCs to the Internet via a WiFi network using a notebook. Here is my network : (Wifi) <=============> (Notebook) <===============> (Desktop) ...
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2answers
64 views

Setting up a server with two NICs using two separate subnets (each on a different VLAN)

I'm using Ubuntu 14.04 (standard server install + OpenSSH, biosdevname=0 during instal to keep the network names simple) in an environment where I have two non-overlapping subnets M and N on different ...
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0answers
16 views

Static Route Dual LAN CARD Centos 6

First let me explain the scenario. I have two internet connection (Lease LINE and BroadBand). I have a CENTOS 6 Server which is used for VOIP calling (GOAUTODIAL). Now I want everyone in the LAN to ...
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0answers
19 views

Dell PowerEdge 1950 - Remote Access Controller not showing in router status

I just received a Dell PowerEdge 1950 server that was pulled during a company wide IT upgrade. I got the system with blank hard drives, installed ubuntu Server on it. I am able to connect the ethernet ...
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0answers
11 views

IPFire configuration as IDS behind router

I want to use an IPFire-Server primarily as an IDS behind an already existing router. The network's router (192.168.1.1) has access to the Internet and provides LAN-Slots for the clients. There is ...
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1answer
48 views

How can I connect two machine's networks using a software approach?

Updates: let's assume the locations are separated, so WAN transversal is a must, and no physical networking is possible. I want to be able to connect two machine's networks together using a ...
0
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1answer
33 views

multi-wan problems with web services

I recently set up a multi-wan connection for a small company, because they are at the end of the line for any possible ISP, services do go down, and they really depend on their Internet connection. I ...
-1
votes
0answers
18 views

Setting up a wireless connection on CentOS 6.5 without NetworkManager [migrated]

I'm trying to set up a wifi connection from my CentOS 6.5 system to a wireless AP, without using NetworkManager. This is a fresh installation, but yet I don't see any ifcfg-* files in ...
0
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1answer
51 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? ...
0
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1answer
36 views

Share Vagrant docker to host

I am setting up a Vagrant box with a development environment. I have some web apps running, some more services, a database and a docker inside Vagrant. Most services are used internally and I do port ...
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0answers
44 views

Load Balancing over multiple ISP connections

I have been trying to implement load balance and fail over on a linux machine having multiple interfaces. Currently I am using two ISP lines and I wish to split the network traffic such that both of ...
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0answers
22 views

Using a G. 655 with a G. 652.D fiber cable?

Is it possible to use a G.652.D patch cord with a G.655 fiber cable for just a small distance (less than 10 m) for the interconnect only (from the patch panel to the switch) ? If yes or no, what will ...
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1answer
18 views

Setting up a FreeBSD Server for packet filtering and routing [closed]

I have heard the many goods of using FreeBSD in Networking over Linux with utils such as pf and ipfw I currently have an multi tier application hosted on a vSphere environment with seperate servers ...
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0answers
42 views

How would you go about connecting 500 users to a corporate network? [closed]

I was referred here through superuser; I have used stack exchange sites for years, and this is my first time posting in one. Original Post: I have been searching the Internet trying to find a ...
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0answers
5 views

What does it mean when the ESSID is null \x00? [migrated]

I'm at the gym, and iwlist is running an AP that has, Cell 03 - Address: 00:23:33:16:E8:A0 Channel:11 Frequency:2.462 GHz (Channel 11) ...
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0answers
11 views

Dynamic Routes at Home Router [migrated]

I am currently using a linux box as my home router (PPPoE to my ISP and NAT, etc). Some websites are blocked in my country (don't say the name out loud), so I have another PPP in my router to a VPN ...
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2answers
2k views

Why is my eth0 called eno16777736?

I've seen http://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames/, which describes the rationale for consistent/predictable device naming, and then the rules by which device ...
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0answers
17 views

OpenVPN - manually config IPs allocation

Yesterday I did this question about a strange fact (that firstly I thought it was some misunderstood from my part, but now looks real) that OpenVPN cannot allocate more than 63 clients when using ...
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0answers
22 views

c - netmap - Tun/tap vs netmap/pf_ring/dpdk [migrated]

Would a Tun/tap device avoid a netmap/pf_ring/dpdk installation ? If tun/tap allow to bypass kernel, isn't it the same thing ? Or those codes bring so many optimizations that they overclass tun os ...
0
votes
1answer
55 views

How to configure a RedHat 6 server to always use the gateway?

In one of my datacenters, I need to configure the server to only speak to the gateway even if the other server is in the same network... How can I configure the network card ? I suppose something ...
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0answers
11 views

FreeBSD jail loses network connectivity after some time

I have a Jail on a FreeBSD 9.2 installation on my office network, which I use to run some cron jobs that upload and download stuff from external servers. The cron jobs are configured on the main ...
0
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1answer
58 views

How can I control bandwidth, access times and priority per VLAN

I'm setting up access points (TL-WA901ND) that can each support up to four SSIDs, which can be assigned to VLANs. I would like to set up three SSIDs, each on a different VLAN, with the following ...
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0answers
15 views

Why does my Windows 7 always take one default route? [migrated]

I've been looking all around but without success. I have a "freebox" (a box given by my ISP) and the two PCs use it to connect to Internet. Its IP is 192.168.1.254. Here's my problem: I have 2 PCs: ...
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0answers
11 views

Windows [not firewall] ignores incoming packets [migrated]

I've got a lenovo ThinkPad T61 running Microsoft Windows Vista Home Basic, and I'm having issues with WiFi. By monitoring network traffic from another computer, I can see that WPA-PSK authentication ...
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0answers
14 views

In what Cisco IOS versions is the “Show LLDP Neighbors” command available?

Could anyone help me with this? Or a place to find command and availability in versions or devices? I'm really new to networking. Thanks in advance.
5
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2answers
295 views

Multiple ethernet interfaces

I have a two network cards, configured like this: eth0 Link encap:Ethernet HWaddr 00:19:d1:31:08:e8 inet addr:192.168.5.104 Bcast:192.168.5.255 Mask:255.255.255.0 inet6 ...
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0answers
30 views

Linux on Hyper-v network errors

I have Hyper-V 2012 on HP DL320 G6 I've installed debian 7 i386 on, added two network adapters and configured it as router for my local network. I found out that sometimes wan interface generate ...
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0answers
28 views

can't reach a specific website

I have a basic linux centos 6.5 box with basic NAT and dhcp server and i am facing a rather odd problem. Turns out nating works just fine users can browse websites BUT there is just one website that ...
1
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2answers
54 views

What would cause alternating “Request timed out.” and “Destination host unreachable.” when using ping command?

I am pinging a Windows 8.1 PC that is currently shut down and I'm getting alternating results "Request timed out." and "Destination host unreachable." What could cause this kind of behavior?
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0answers
16 views

Network error when running multiple Virtual Boxes

I have a Ubuntu 14.04 physical desktop that's running some Virtual Box instances (also Ubuntu) through Vagrant. The Virtual Box instances are configured to use static ip and with "natdnshostresolver1" ...
-1
votes
0answers
21 views

debug tcp packets to validate iptables rules [duplicate]

I am on coreos writing iptables rules to manually connect docker containers manually. I wonder how one could debug iptables rules. I want to see where packets are going and see by which rules packets ...
1
vote
2answers
46 views

In which order are rules of custom iptables chains evaluated?

I am fairly new to iptables. The picture below shows the order in which chains are evaluated based on my current understanding. If that impression is wrong please let me know. My question is where ...
-1
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0answers
33 views

Wake-on-LAN Not Working

My company runs a Dell Precision T7500 (running Ubuntu) as a server and I cannot get WoL to work. WoL is enabled in the BIOS. Both settings (Enable and Enable with NIC boot) have been tried. Per ...
0
votes
1answer
37 views

live migration of a virtual machine to a different machine

I am trying to do live-migration using KVM (libvirt). VM is called host1 and dest. IP address is 10.81.1.9. However, running the following command gives me an error that I am not sure what this ...
1
vote
1answer
42 views

How can I host multiple websites from the same Windows 2008R2 server?

server running Windows Server 2008 R2 with two NICs and running IIS two Internet connections we can only get one IP address on each Internet connection. two routers we want to serve two websites, ...
1
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1answer
26 views

Upgrade network Class vs Virtualized LAN

We operate on one class C network, let's say 192.168.1.0/24 But the problem is we have 262 devices! I propose upgrading the network to a class B. The opposition proposes purchasing new hardware and ...
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0answers
22 views

Network issue if RRAS NAT enabled

I have a newly installed Windows 2012 R2 on my server. I want to enable NAT to handle the routing for the clients and the virtual machines what are running on it. I added the necessary roles for it ...
2
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0answers
97 views

Network Layer 7 Deep Packet Inspection linux solution that isn't a all-in-one distro?

Overview: I have software that has our Edge/DNS servers hardcoded into them, DNS queries returned from DNS servers are not being masked properly. I need the DNS entries that are returned from BIND ...
2
votes
1answer
49 views

How to set up Incoming Connection over modem for offline Windows 7 system

I have a Windows 7 computer that will be offline except for a modem connection. From a previous question I have worked around an error setting up the Incoming Connection. (The RemoteAccess service ...
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0answers
25 views

OpenVPN won't connect from remote location [migrated]

I set up OpenVPN on a linux machine in my basement. I'm able to connect from my Windows 8.1 machine without an issue when I'm connected to the local network. In this instance, I set the config file ...