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

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Internet traffic counting software for Linux / FreeBSD router?

Are there any (popular) software to count traffic passed via Linux / FreeBSD router? "Traffic" means number of bytes per month per provider (WAN). Additional details (for example, per shorter ...
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29 views

Looking for network description language (DSL) [on hold]

I'm looking for a domain-specific language that is focused on building networking definitions (transport, services, ports, interfaces, probably some failover configuration, etc.). I plan to use it to ...
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1answer
20 views

Allowing Internet traffic into DMZ using Azure Network Security Group

I am trying to create a simple DMZ using Azure Network Security Groups, using a Barracuda WAF as the public entrypoint into the DMZ, however I am having some trouble allowing internet traffic to ...
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0answers
6 views

kvm guest not able to reach anything other than host

I'm trying to setup KVM on a vm in my esxi instance. The vm is ubuntu 14.04 and I have enabled virtualization for my vm. I want to use bridged networking for the setup. I can get the guest up and ...
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0answers
9 views

M6220 Configuration Assistance

I'm trying to setup an M1000e chassis I just received. I know about nothing related to networking, but I'm good with the hardware and software components of this system. Here is my situation and ...
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1answer
28 views

At my wits end about slow application response [on hold]

I'm hoping someone can help me with this seemingly impossible task. We have several internal applications in my company that is used by employees at multiple locations with no issues. Out of the blue, ...
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0answers
4 views

m_split reverse operation for mbufs [on hold]

I need to perform an operation to combine two mbufs as a single mbuf pointing the complete data by both the single mbufs. For instance, if mbufA --> 0xA0 to 0xB0, and mbufB --> 0xB0 to 0xC0 and these ...
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8 views

Docker container needs access to a few vlan interfaces on host

I have a debian box, with a lot of vlan interfaces iface vlan4003 inet static address 10.254.25.249 netmask 255.255.254.0 mtu 1500 vlan_raw_device eth1 iface vlan4004 inet static address ...
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21 views

BroadCom 5720 Multi-Switch Connection failing to achieve full bandwidth

We have following Setup: 2 redundant Dell 2848 Switches, identically configured and connected via 8-Port LAG on Ports 41-48. 2 identically setup Dell R730 with BroadCom 5720. Operating System is ...
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1answer
25 views

measuring network throughput with netperf

I'm doing benchmark test of Linux server using netperf. According to information at networksecuritytoolkit the theoretical max throughput rate for 1514-bytes packets is 117.35 Mbp/s. However I'm ...
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0answers
13 views

enable lacp mode active on isr 2951

Any idea if ISR 2951 support LACP ... i don't see any cli command to enable it. My router IOS version is 15.2(4)M7. Can you help please. below is my config: interface Port-channel1.1 description ...
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8 views

MAC to MAC MII interface not working

I have a MAC to MAC MII interface, whose schematic design is followed from here. I want to ping one device from another. I have worked with MAC to PHY MII interface and get it working. On ...
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43 views

Bridging two datacenters

i need to find out what would be best way to bridge current datecenter with new DR datacenter. I have following network configuration (show in picture). http://i.imgur.com/7bohb3I.jpg So on internal ...
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1answer
46 views

Out of 2 VMs and their 1 host, only 2 at a time are reachable from the LAN

I have a VMware vSphere hypervisor set up with two VMs. I need to be able to reach the host (for configuration, etc.) as well as both VM's from my client (which is also in the same subnet). I want to ...
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3answers
45 views

Linux network interfaces take so long to come up

When any of the network interfaces on my x86 server comes up (1GbE port with igb driver, or 10GbE port with ixgbe driver), whether it's been done using ifup or by enabling the switch ports it's ...
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1answer
33 views

How do I get a network interface up in rhel 7?

I was given a rhel7 vmware template to use for provisioning rhel 7 test environments. When I created my vm, it booted up fine except that my network interface doesn't seem to come up. If I type ...
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1answer
28 views

CoreOS - Starting Docker containers on specific VLANs

This is an addition to this question about how to setup VLANs on CoreOS [CoreOS bare-metal vlan networking. My question after is after you set this up, how do you use it? How do you start a ...
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31 views

Cisco vpn access to another router

I am using a Cisco ASA 5505 to VPN into my network (which is working great), and I want to connect to a different network that is on a Asus RT-N66v. For example: network 10.1.1.1 is my VPN and ...
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0answers
10 views

Windows Server 2012 PerfNet error: (2006) Unable to read Server Queue performance data from the Server service [on hold]

I have seen the Windows Server 2008 bug, but what about Windows Server 2012? PerfNet event error (2006): Unable to read Server Queue performance data from the Server service. The first four bytes ...
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0answers
23 views

Cisco 3850 flooding all ports because CAM table not populated?

Encountering a strange issue with a Cisco 3850 that is in use as a core switch. It is flooding all ports on the switch with traffic. After investigating more, it appears that the CAM table is not ...
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1answer
26 views

how do i make my website accessible to the internet without a static ip and from a virtual machine? [on hold]

I have windows 8 host and i have installed ubuntu 14.10 server as a virtual machine in vmware. i have installed LAMP server and i am trying to host a website from it. i have created a virtual host. my ...
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23 views

IO Rate is exceedingly incrementing

I have read through Is a 'high' IO rate healthy?, and was at ease when I read someone say that even 50,000 / hr wasn't an issue.... or not unhealthy, to answer their question; so I increased ...
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0answers
23 views

way to trace IP address change in Windows [on hold]

Ours is a small network consisting of 15 users. We have lan messenger installed in every machine. Someone is misusing it by using annonymous IP address in their system. We traced the anonymous IP as ...
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1answer
41 views

Why does my TTL value fluctuate with dig? [duplicate]

I dig xkcd.com, and I get something like this back: ; <<>> DiG 9.9.5-3ubuntu0.1-Ubuntu <<>> xkcd.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: ...
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1answer
16 views

Cannot use PStool for more than 7 PCs over LAN

Below is the batch file command I am currently using to shut down remote computers on our LAN. Here is what it does. I have specified the remote computers IP address in text file named list.txt I ...
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1answer
24 views

Remote Desktop connection error [on hold]

It's been a while I'm using Remote Desktop to work with a server and it was fine. but suddenly this error appeared : your remote desktop session has ended. your network administrator might have ended ...
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0answers
14 views

Name resolution across multiple adapters (VPN)? [on hold]

I have a situation where I use a VPN to work remotely. I cannot get DNS recognition on any addresses on the remote network. If I use IP addresses, the connections work fine, so the network is up ...
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0answers
27 views

How to set up a Linux gateway for multiple WAN networks?

I have a network with the following IPv4 and IPv6 addresses: eth0 Link encap:Ethernet Hardware Adresse 30:85:a9:42:3e:60 inet Adresse:109.2xx.239.145 Bcast:109.2xx.239.255 ...
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0answers
32 views

How do we maintain our global operation in China [on hold]

I work for a company with offices around the world, we use Google apps and mail and we have a website hosted in Europe that our customers globally need to access. we have 2 challenges 1) Our website ...
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1answer
23 views

Firewall High Availability - Active Active set up [on hold]

I wish to create a cluster consisting of two or more routers which have firewalls active on them. These routers would be connected to a single ISP through a switch. The basic idea is to make sure ...
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0answers
46 views

Unable to configure eth1 and eth2 properly on Ubuntu [migrated]

I am completely new to network administration, and so am finding things a bit tough. I have a machine, whose 1 interface I have to set to the subnet 10.0.20.0/24, another to 10.1.0.0/24 and a third to ...
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18 views

Certain PCs on a domain become unreachable. Solved by unplugging/plugging ethernet

I have a domain of approximately 30 PCs. All but 3 are running Windows 7 Professional, the others are running Windows 8.1 pro. I've noticed there are a handful of PCs that aren't reachable via ...
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1answer
27 views

Accessing virtual host from all computers on home network [closed]

I've set up an Apache server on a computer in my home network and enabled name-based virtual hosting. When I enter the URL of the virtual host on that computer in a browser the page is correctly ...
2
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1answer
59 views

Static Route for Windows

I have a network as follows. Router->Windows Server->Clients I want to be able to be on the LAN of the router and access the clients who are on a different subnet behind the Windows Server with ...
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1answer
28 views

Execute PHP script when someone requested a certain file in another Folder

I am building a WebHosting service. Users can create a Account and upload Files with FTP and access them by visiting username.mywebsite.com (just an example). I would like to record the number of ...
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1answer
31 views

Cannot connect to port over the internet (works from localhost)

I'm running something (=Faye server) on port 9292: david@theta:~$ lsof -ni tcp:9292 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME ruby 2406 david 13u IPv4 1579461398 0t0 ...
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1answer
26 views

How do I properly configure host server net adapters when using Hyper-V?

I am converting a number of physical servers to virtual ones, and I have a question regarding configuring the physical adapters on the host server. I am new to virtual machines, and have a nagging ...
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0answers
4 views

Debian server makes internet connection drop [migrated]

I have setup a small home server / NAS running Debian 7. The server is connected directly to the router with a static IP set in the router's control panel. There are no port forwarding rules set for ...
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0answers
3 views

Bandwidth control for my home network [migrated]

Goodday, I just wanna ask if how can i control the bandwidth of the wiFi users. I have two routers. First is the modem/wireless router (DHCP) (2in1) (KASDA brand) provided by my ISP, it has other ...
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0answers
9 views

IP address visible in browser's “Inspect Element” [migrated]

I've recently started hosting my own website on a machine on my network. Whenever anyone goes to my site and does "Inspect Element" my external IP address is visible to everyone. This seems like a ...
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1answer
43 views

Cisco ASA - difference between inside_access_in and inside_access_out?

So a minor problem we have is any internal servers have no (non-icmp) access to the outside is being blocked. Our current config is: inside_access_in any ---> any ---> icmp inside_access_out ...
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1answer
24 views

How to route load from one server machine to another on falure?

I have two HP Proliant servers. Both have same configuration and same data (Replicated). Currently all production load is on Server A, while Server B is idle. Now I want to configure my network such ...
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0answers
23 views

Application that is low Throughput and long delay [closed]

Can someone give me an example of an application that has a performance requirement of low throughput and long delay? For example video conferencing requires high throughput and short delay, so I am ...
-1
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0answers
9 views

Why next router have smaller response time than previous router in mtr? [migrated]

In other words why first host have 20.4 ms response time but second host have 15 ms response time. As I know for access to second host must pass through first host, Is that true? Why is this ...
1
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1answer
49 views

Hitting Ephemeral TCP Port Exhaustion

We run a high traffic website. Over the past few days, we've had several customers complain of sporadic downtime that we cannot reproduce. We have several web servers elected to receive traffic from ...
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0answers
13 views

Windows 7 routing with single NIC [migrated]

I have a PC with single NIC running windows 7. This PC is a member of 180.x.x.0/24 network and is internet accessible. Now, my brother brought another PC with single NIC. I want to make it also ...
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20 views

Leased Line Service [closed]

I want to know ...if I am planning to have a leased line for a Domestic Society....for approximately 60-80 devices...what is the ideal bandwidth required to have a good internet connection....by ...
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0answers
20 views

server 2008, SMB issues after changing to virtual network

I have a windows 2008 server that I use as AD, DNS, and mostly for file sharing. I wanted to use hyper-V to add a virtual Linux box for some network monitoring software. So I added the external ...
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2answers
26 views

Can I use an LC-SC fiber optic cable with a 10G NIC that only mentions support for LC-LC cables?

Specs (ftp://ftp.supermicro.com/CDR-NIC_1.32_for_Add-on_NIC_Cards/MANUALS/datasheet-AOC-STGN-i2S.pdf) for Supermicro Fiber NIC AOC-STGN-i2S say it supports LC-LC 10G cables. Is there any reason to ...
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1answer
29 views

What is the purpose of these routing tables

I examining a debian router's configuration. Route output: 71.71.71.0 0.0.0.0 255.255.255.224 U 0 0 0 eth1 10.0.0.0 0.0.0.0 255.255.255.0 U 0 0 ...