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

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Networking failover

i am not much expert at network side , i am looking for help... we have main office and branch office, both are connected through fiber cable. we are planning for long range wireless also for ...
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Is there a way to get current txqueue utilization on e.g. eth0 or tun device?

I have detected drops on my tun0 interface. They seem to have been caused by low txqueuelen setting. Now as I increased the txqueuelen value for the network device and there are no more drops yet - ...
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1answer
11 views

What do I need to consider when setting TCP idle timeouts?

What's purpose of having a [low] TCP idle timeouts? E.g., why have a 60 second timeout on a firewall or load-balancer? Is it a memory management or /performance optimization thing? Is there a security ...
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4 views

Two IPv4 adapters in same PC on same network valid? [migrated]

Is it valid to have two network adapters on the same PC have the same network portion in their IPv4 address? If not why is my DHCP server doing so and how should I setup my DHCP server to have it ...
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2answers
35 views

Multiple non-http services, 1 static IP

I have an issue where we have several non-http(s) services which we would like to access from across the WAN. SSH is a primary protocol we'd be using, FTP as well. Here's how things are laid out. We ...
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1answer
7 views

Working WCF WebServices with NLB server

Im starting the architecture of a new project using WCF, but im not the right person to make some network considerations, so im doing some research but cannot find the answers to these questions: ...
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2answers
40 views

how to get ip address of a PPP(Point-to-Point Protocol) network interface?

I have a Linux machine with two network interfaces, and I'd like to get the IP address of the PPP interface w1g1 but it doesn't show up in ifconfig. There is a public IP on the PPP interface, but ...
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28 views

“Network name cannot be found” just on some shares

We had an Windows XP in a VMWare virtual machine joined to an Active Directory domain. DC servers are Win2008 and the workstations have static IP addresses. Because the HDD with that vm (called P2) ...
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17 views

Create account for service

I am configuring a new server. The server is running Hudson that is going to copy some files from this server to another. The other server is a virtual machine. Both running Windows Server 2012. ...
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29 views

Solution for file store needing large number of simultaneous connections

So I'm fairly new to large-scale architectures. We're currently using linode instances for our project, but we're brainstorming about scaling. We need a file store system than can deliver ~50mb ...
2
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1answer
67 views

What is the correct iptables rule when NATing multiple private subnets?

I have a Centos minimal 6.5 acting as a router. eth0 is connected to a Cisco switch trunk port, allowing VLANs 200-213. I have several VLAN interfaces just as this link suggests: ...
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1answer
37 views

tc-qfq is classless error

I'm using Linux 3.0.101 with iproute2-3.4.0 on a router and I'm getting this error: tc qdisc add dev eth2.2 root handle 1: qfq --> OK tc class add dev eth2.2 parent 1: classid 1:10 qfq weight 1 ...
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18 views

Problems with Windows Server 2012 Hyper-V [on hold]

I install a windows server 2012 R2 and then install a virtual machine on hyper-v. When i configure the virtual machine in hyper-v i configure 4gb of ram then few days later y change it to 12gb of Ram ...
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1answer
40 views

Blocking an SSDP Flood

I've been hosting game-servers since a long time and I keep updating my iptables firewall time and again to block most attacks. One of my game-server port is being flooded with "SSDP" requests and my ...
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8 views

Want to route NFS response via an interface. What will the source ip of the packets being sent out?

The NFS server is listening on an interface for a new connection, once a new TCP connection is established the NFS operation is carried out. I'd like to send this NFS response via a different ...
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1answer
24 views

How to set up vpn tunnel (ipsec) connection

I'm working with a client who wants to set up a vpn tunnel between their network and ours. They're in charge of the tunnel and to give us the access they are asking me my public IP and my LAN IP. ...
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2answers
28 views

Ways to setup a ZFS pool on a device without possibility to create/manage partitions?

I have a NAS (Synology DS214 with DSM 5.0) where I don't have a possibility to create and manage partitions (maybe I could with some hacks that I don't want to make). What ways to setup multiple ZFS ...
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1answer
31 views

peer to peer disk image transmission

Installing linux/windows through pxe works smoothly for me. But downloading images(especially windows) is a headache. Let alone the time, bandwith usage is horrible. And p2p tech comes to my mind. ...
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1answer
13 views

iptables and TPROXY support

I'm running iptables v1.4.21 on Ubuntu 14.04 and is trying to setup iptables to use TPROXY. How can I check whether my current build of iptables supports TPROXY? I can check TPROXY support for ...
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1answer
46 views

Public IP on LAN port. Is it possible? [on hold]

I have a RV042 router with a public static IP (XXX.XXX.XXX.42) and 4 LAN ports assigned to net 192.168.1.0/24. Can I connect a host to one of the LAN ports and assign it a public static IP ...
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34 views

TPROXY Not working with HAProxy, Ubuntu 14.04

I'm trying to use HAProxy as a fully transparent proxy using TPROXY in Ubuntu 14.04. HAProxy will be setup on the first server with eth0 111.111.250.250 and eth1 10.111.128.134. The single balanced ...
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1answer
22 views

Using 2 Transparent HAProxy for load balancing

We can configure HAProxy to be a transparent proxy by using the guide here, where one of the steps says ...to put the backend servers in a different subnet to the front end clients and make sure that ...
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1answer
42 views

AWS - What do we mean by associating a subnet with an elastic network interface? [on hold]

I'm trying to understand the meaning of this output: [user@ip-10-1-3-12 ~]$ ip route default via 10.1.3.1 dev eth0 default via 10.1.0.1 dev eth2 metric 10002 10.1.0.0/16 dev eth2 proto kernel ...
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4 views

Draytek AP Wireless Bridge IP Issues For LAN Devices

OK, I have a very messy network at my office, piggybacking off a neighbor's WIFI for internet (with their permission). I have a Netgear Router + DNS (DGN2200) connecting via LAN to a Draytek 800AP. ...
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2answers
48 views

How many IPv6 addresses can one network card have assigned to it, and what is the benefit?

This is not my area of expertise, so forgive me if I am getting this completely wrong. Some datacentres are now offering IPv6 addresses and potentially 100s per VM. What would the benefit of this be? ...
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1answer
50 views

What would be the side effect if I use network address as my IP address? [on hold]

I have read at multiple places that network address is a reserved IP and is not recommended to be used as an IP address for an interface. However, I do not see any immediate error or other side effect ...
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3 views

Firewall Ports for Toshiba CIX server

Other then SIP ports: 5060 and 5061 what other ports need to be opened to have a phone set up in a satellite office with via external IP address. Phone Server CIX100 Firewall ASA 5510
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9 views

problems in configuring a modem wirelessly [closed]

Hope you are doing well. I'm new to networking and as my first project I want to configure my TP-LINK wireless modem router. When I type 192.168.1.1 in my browser, nothing happens and I just see ...
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3 views

network adapter not listed in my virtualbox vm [migrated]

I am trying to SSH into a virtual machine I have set up in virtual box from my Windows 7 host machine. I would like to make several development machines and ssh into them from my host machine, as well ...
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13 views

What is the difference between stopping a mtp3 link and inhibiting it? What is meant by inhibiting a mtp3link?

Can you explain to me, what inhibition of a mtp3 link means? What is the difference between stopping a mtp3 link and inhibiting it?
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14 views

Cisco SG300-20 or HP Procurve 2810-24G [closed]

I'd like to know what's better for my current network setup. Currently I've got 2 hypervisor servers running and 2 storage servers running. All of them running on one Cisco 10/100Mbps switch. I'd like ...
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13 views

Fortinet static nat

I have been doing fortinet's since 2009, so I kind of know my way around the box... I'm just got another I setup this evening, a 200D, with the latest fortiOS 5.2. It seems they still do not have a ...
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49 views

Is there an open source implementation of RFC 2544? [closed]

I've built an open source implementation of RFC 2544 in bash and writing a report on my work I've been asked to list other open source implementations of this RFC. I've searched on Google, on code ...
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0answers
9 views

Netconf + KVM - Bridge [closed]

I just installed a Windows KVM on my Linux-Kernel. I want that the KVM gets it own IP-adress which I just bought from my provider. Does anyone know how this works? Would be very nice. You can also ...
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2answers
48 views

How to setup IPTables on KVM host - iptables-persistent is being ignored

I'm trying to setup some specific IPTables rules on an ubuntu 14.04.1 host that runs some KVM guests. The box has multiple NICs with multiple IP addresses and the guests use different addresses based ...
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18 views

What it takes for an openstack instance to connect to internet

I'm running a two node openstack cloud with single NIC using nova-network, Everything seems fine but when it comes to networking there are many problems and I think thats due to having only one NIC on ...
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26 views

Pfsense on intranet ip address

I wish to secure the traffic between ESXi server vms and other physical nodes on my network. What I have: A public IP address on the WAN port of the Wifi router A dedicated server with 2 NIC ...
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12 views

How to configure networking on Gentoo KVM guest using failover IP [closed]

I have this configuration in /etc/conf.d/net: config_enp0s18=( "X.Y.222.117 broadcast X.Y.222.117 netmask 255.255.255.255" ) routes_enp0s18=( "X.Y.186.1 dev enp0s18" "default via X.Y.186.1" ) ...
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25 views

network inbound from other subnets refused to server A, Server A can go outbound to internal networks, but not internet

I have a RHEL 6 server with 4 NICs on 192.168.2.[30-33]/24 Set with DHCP reservations via infoblox, I have checked and the MACs all match up. ifconfig shows /24 for every netmask, and the routing ...
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0answers
22 views

Existing open source proxy servers? [closed]

My goal: I need to block a lot of webpages like facebook, twitter, youtube etc. have more control with the acces to internet I saw on sisco one option that can control the acces to internet via ...
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0answers
26 views

DVR monitoring thru domain [closed]

how can i host a service to redirect clients using my web site wwww.example.com to their dvr client1 will visit example.com:port1 client2 will visit example.com:port2 client3 will visit ...
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1answer
65 views

How does ssh work when client and host are on the same machine?

I illustrate my question with the help of docker containers but this example is orthogonal to the rest of the problem. In fact any program that allows the use of bridge interfaces and ssh would do. I ...
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0answers
47 views

Why exactly can't two nearby networks have the same subnet? [closed]

I know it is can't. But after re-think, I don't know the reason why exactly it can't. I did a bit searches, but I couldn't come upon plain answers. Simply say, I have a broadband, giving me IP ...
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10 views

Unable to access WAN using TomatoUSB [closed]

I installed TomatoUSB on a Cisco E3200 wireless router. The install seemed to go smoothly. DHCP and wireless encryption all seem to work perfectly. However, any computer connected directly to the ...
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1answer
65 views

Cisco - what is the purpose of a gigabit ethernet switching module

Cisco noob here Recetly while looking for a cisco switch and router combination for my CCNA studies i won this bid for a (I added the bid to keep track of it and i ended up winning it) ...
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1answer
39 views

Port Mirroring to Mac Thunderbolt Ethernet [closed]

I have a switch with port mirroring enabled. So one port is the source port, and the other is the mirror port. In the source port, I have a wifi router plugged in. The mirror port is connected to ...
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13 views

Unable to communicate with web proxy server on iOS

I am following the instructions on how to use a HTTP proxy with an iPhone, however I appear unable to communicate with the HTTP proxy. I have configured the settings in my phone correctly to use the ...
4
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1answer
412 views

Internet routing table breaks 512,000 routes [closed]

Looks like with all the mass IP grabs as well as subletting of space, things have finally hit the 512K mark. Anyone on the raw end of an upstream router that ran out of route space? How do most ...
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1answer
65 views

Poor network performance with KVM (virtio drivers) - Update: with vhost_net

I've set up several KVM based networks before, and never encountered this issue, can't for the life of me think what I'd have set up differently previously. Setup Basically, Ive got and entirely ...
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1answer
26 views

How can I know what proxy server is being [closed]

I'm in a network environment that blocks all internet connection except using the proxy server. Being a client inside the network, how can I know which proxy server is being used by the network ...