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

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Terminal for remote control of PC [on hold]

For a transition period, we want the staff to remotely control their PCs, or they can work remotely on the machines. The PCs got centralized in a server room and the workplaces are only equipped with ...
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13 views

Tweaking my router [on hold]

Recently I brought a router "TP-Link 300 Mbps Wireless N Router (TL-WR841N)" and configuring it to use it with my ISP. My isp gave me a static ip configuration. So I put them in the router and it's ...
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0answers
15 views

Can I specify a port when connecting to a Windows share?

I have a network setup like this (Windows File Server) <-> (Windows Gateway) <-> (Workstation). I am trying to allow the Workstation to access a share on the Windows File Server. I was ...
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1answer
27 views

Private communications between AWS EC2 instances

I have three EC2 instances with elastic IPs. Each one contains a server. Each server needs that TCP ports 8181, 2181, 2888 and 3888 are opened on each machine. Each server should have the possibility ...
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3answers
22 views

Ubuntu / iptables: Using a server as middle-man to talk to firewalled server [duplicate]

I have a situation where I need to communicate with an API that only allows connections from one particular IP. So api.example.com accepts connections on port 443 from whitelisted-ip I want to be ...
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1answer
18 views

How to configure bridging

I am trying to configure a bridged network in a CentOS machine created with virtual box. I already did the same on two ubuntu 12.04 machines, and this is how the /etc/network/interfaces file looks ...
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1answer
35 views

Benchmarks for server response time [on hold]

I was testing my website’s performance on Google Page Speed and it mentioned the response time at It average between .6-.8 seconds. What’s the optimal server response time that’s acceptable? Is ...
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1answer
20 views

Trouble Connecting with Cisco VPN client reason 412

I'm using Windows 8.1 trying to connect to an Office using Cisco VPN. I try to connect and after a few seconds I get this: The Secure VPN connection terminated locally by the client reason 412: ...
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2answers
218 views

What problems result from servers not time-sync'd?

What problems might arise within a domain when the member servers are not properly time-sync'd? I'm aware that log entries are incorrect making troubleshooting more difficult in time-sensitive ...
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0answers
26 views

Unable to access ISP gateway user interface

I am hoping that someone can assist. I have a Windows 2012 Server that is a domain controller and serves local ip addresses out on our network (DHCP). Everything is working fine with the exception of ...
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0answers
28 views

Windows 8.1 stops responding to ping after user has signed off

When i sign out of my win 8.1, it stops responding to pings from my other machine. This win 8.1 is installed on a laptop, so I guess this may be a power plan issue, but currently I have power plan ...
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1answer
60 views

cannot ping linux network namespace within the same subnet

Here is a quick summary of the issue. I cannot communicate with a linux network namespace within the same subnet. I am running Ubuntu 14.04.1 LTS on a headless server. I have been troubleshooting this ...
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1answer
79 views

Is it possible to process millions of datagrams per second with Windows, using a vendor agnostic API?

I am investigating if I can implement an HPC app in Windows that receives small UDP multicast datagrams (mostly 100-400 Bytes) at a high rate, using a dozen or up to maybe 200 multicast groups (i.e. ...
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1answer
44 views

WAN IP Ranges and NAT [on hold]

Let's say we have a router with a WAN IP assigned by DHCP: 1.1.1.1/255.255.255.255 The ISP subnet for it's lan interface is 82.5.167.161/255.255.255.248 My firewall behind this router is on WAN IP: ...
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1answer
18 views

Can not connect into a subnet across a StrongSWAN VPN

This is a simplification of a bigger problem I'm experiencing, but I think it covers everything. The production issue is between a StrongSWAN VPN and a Juniper SSG550. The network setup is clearly not ...
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0answers
13 views

Web request from different IP addresses on single network card

I have a windows server with 5 public IP addresses mapped to a single network card. When I run initiate a web request from this server, the request's origin IP always remains constant. How can I make ...
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0answers
26 views

Low TCP down speed on network interface

We have HP Proliant ML370 G6 server with 4 gigabit ports on it. 3 ports work well, but 1 (LAN1) cuts TCP Down traffic. TCP Up and UDP is ok. Here is the speed test result. Here is the windows monitor ...
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1answer
35 views

vSphere ESXi 5.5 Windows Guest Network card not active after reboot

Problem: Windows 2008 R2 or Windows 2012 servers have no network access after a reboot Not all VMs affected, but multiple VMs and mulitiple hosts. Windows Network configuration shows the correct ...
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1answer
20 views

Routing issue on Linux with Mobile Broadband

Note: This is a "cross-post", I asked this same question on "superuser" StackExchange site, but without obtain any answers, just a comment (now curiously disappeared). I've thought this site is ...
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0answers
34 views

kvm guest routing with 2 default gateways

I have a kvm guest with two virtual NIC. NIC with internal IP III.III.III.III (eth0) NIC with external IP EEE.EEE.EEE.EEE(eth1) I'm using macvtap. The host has his own external IP. I can ping ...
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0answers
8 views

Network problems, can't ping my mac [migrated]

I run VMware Fusion 7.1.1 and an Ubuntu server 14.04 on my imac 10.10.3 for web development. I have a thunderbolt Promise connected to the mac and mounted this on my ubuntu using smb, everything ...
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1answer
19 views

NAT forwarding (whole IP) working only on some ports

Since my hoster doesn't allow briged setups I had to go for a NAT solution to run my CentOS VM on an additional IP and my host machine on the primary IP. Now, I've got a problem since for ports 22, ...
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1answer
41 views

Two separate internet connections, two routers, one server and multiple clients [on hold]

Recently we have got second internet connection from different ISP and now we are having a problem connecting our server to both routers which should be accessible from any client connected to any of ...
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0answers
15 views

Routing is disabled for LAN users while choosing all-net for IPSec tunnel

I have VPN with L2TP/IPSec server and tunnel configured. When I choose all-nets 0.0.0.0/0 to allow connection from any computer in the world, all LAN users with subnet 10.0.0.0/8 are disconnected from ...
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1answer
31 views

Share a folder programatically with custom credentials

Is it possible to share a windows folder with custom credentials (rather than a windows account)? I'm developing internet cafe software. I want to mount a desktop folder from a network share upon ...
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0answers
24 views

Total no. of hosts with 2 NATs in the whole network [on hold]

How many hosts we can have with two NATs in the whole network if in IPv4 all the ip addresses are allowed to assign to a host in the network.
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17 views

GPON Gateway Settings

So recently my ISP installed optical fiber device. From the device description according to the gateway setting, it's a GPON Device The default package by the ISP is set to 4mbps. But when I started ...
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17 views

Need all local traffic through Debian - Routing? [migrated]

Been dealing with this for some hours now and my head are really spinning. So I got this cable network router (192.168.0.1) that Im trying to pass all my local traffic to. But I cannot for the life ...
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0answers
41 views

Slowness in Mac-based business network [closed]

My treatment room former dell PC/running vista business/ running the server and network versions of my Dental practice mgmt & X-ray capture apps, had no problems connecting to the front desk iMac ...
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0answers
25 views

Save IP Camera stream with PC alternatives [closed]

I need to purchase a pair of IP camera for my small office. The model we want supports H.264, MPEG-4 and MJPEG. The manual lists it supports OS windows xp/7/vista. We only run Linux in the office ...
-1
votes
1answer
36 views

How to schedule firewall to block wan connection on Windows 7 [closed]

I have a camera on my pc. There are 3 NVR (network recorder ) on different network connected to my cam throug WAN connection. I need to block any NVR from accessing my camera in different hour, and ...
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0answers
12 views

ESXi 5.5 - Management network with no gateway [migrated]

I'm setting up a test lab for VMware in Hyper-V. I have 3 vSwitches in Hyper-V: -EXT01 -INT01 -INT02 I've also created a W2K12 VM in Hyper-V which has the following roles installed: -AD/DNS -DHCP ...
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54 views

DNS problems with a static IP configuration in a VM [migrated]

I am using Parallels Desktop 10.2 for Mac on OS X Yosemite. I am trying to configure my my client (Ubuntu 14.04) to host a website that is available to the host via a particular domain name. In the ...
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1answer
45 views

why my nat iptables rules dont work with marked packets?

System: debian squeeze, Linux server 2.6.32-5-amd64 #1 SMP Tue May 13 16:34:35 UTC 2014 x86_64 GNU/Linux, iptables v1.4.8 lsmod | grep iptable iptable_security 2176 0 iptable_mangle ...
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2answers
34 views

Combining two subnets with same default gateway

This is the current situation: Subnet 1: 192.168.1.x (255.255.255.0) with default gateway on 192.168.1.1 Subnet 2: 192.168.90.x (255.255.255.0) without any gateway (no internet access) -> all ...
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1answer
55 views

Multiple DSLs connected to single HP server

networking noob here! Got a pretty specific question. Is it possible to plug 10 cat5 (network) cables that come from 10 different DSL modems to an HP server so I have 10 different broadband lines ...
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1answer
27 views

How to route VPN traffic through a separate internet connection with a SonicWALL firewall?

We have a depot quite some distance from the exchange, the expensive internet connection is only getting 2/1Mb. This causes constant drops as soon as someone downloads anything. We have now got a 4G ...
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1answer
22 views

Static route to Single IP using SSL connection

I am trying to configure a static route to a single IP. My question is two fold: How do I specify a single IP using a subnet mask x.x.x.x/? (not a range of ip's) My pc is making an SSL connection to ...
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23 views

Why would my logged public IP differ depending on the type of server (or computer) I am connecting to? [migrated]

I am writing a p2p gaming lan emulator that uses the torrent infrastructure to network peers, set up lobbies, etc. Currently, the only infrastructure we are using is the trackers (we plan to us Tox ...
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0answers
16 views

Connect 1 computer with to 2 networks, route through 1 VPN [on hold]

Suppose the following scenario: I have a question, I am sure it has been asked but I do not know how to word it or what to look up. My Problem: I am a high school student of an advanced Video ...
-1
votes
1answer
18 views

error 500 web page share point [closed]

In my environment we are having 3 branches eg:A B C all the branches are protected with cyberoam firewall also ..and IP to IP trafiic is Allowed to all three branches. Recently A branch is able to ...
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23 views

Filtering KVM guests with IPtables

My partner has a server with OVH that receives a constant variety of ddos attacks, while still staying up. We want to use IPtables on the host to filter the guests VM's traffic. The guest VM we want ...
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0answers
12 views

GigaVUE-420 ERROR: failed in probing PCI device [closed]

A unit that was picked up was booting to the RedBoot prompt, but I was able to get it to load the image now I am getting the below message on bootup, and then it hangs. +eth0 mgmt port: NO LINK No ...
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0answers
17 views

Routing traffic using IP tables for two NICs [closed]

I have two NICs (eth0 and eth1). I want to block all traffic (Incoming/outgoing) on eth0 except for port 25 and 993, and allow all other traffic (Incoming/outgoing) on eth1. What's the easiest IP ...
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0answers
36 views

ESXi + pfsense traffic segregation [migrated]

I'm kind of new to setting up networking with ESXi and working with pfsense, so please excuse if this cannot be done or I'm asking something the wrong way. I'm using ESXi 5.5.0 and I want to host ...
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0answers
8 views

Can I use same suricata instance for both IDS (for L3,4) and IPS (for L3,L4,L7)?

I have a interface where traffic is flowing from internet to NGINX server to application server. I want to monitor (IDS) the traffic flowing between Internet and NGINX at L3,4 and IPS the traffic ...
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39 views

Subnetting and VLANs for Multiple Buildings Strategy

Curious for a little feedback on how others do this. A site I'm looking at has multiple buildings connected by fiber and each is on their own subnet. 192.168.0.0 - Building 1 - VLAN10 192.168.1.0 - ...
14
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1answer
190 views

Vendor whitepaper says: 5Mpps no prob. I'm already hitting a wall at 120kpps. Where's the bottleneck?

HP's whitepaper on their QLogic (fka Broadcom) NetXtreme II adapters, which includes the specific NIC that I'm testing, states (page 7) that their small packet performance for packets up to 256 ...
0
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1answer
26 views

Forcing traffic through an IPS on a flat network through a bump in the wire

I have the following topology: Click here, unfortunently I don't have enough rep to post images Essentially I would like the packet flow to go from PC1, to the Core Switch, to the Edge Switch, and ...
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45 views

Understanding a computer providing a bridge to the Internet [migrated]

Where I work we have a very old Linux machine that is doing our DNS/DHCP and other network services. That machine is our Default Gateway and all internet connections go through this computer somehow. ...