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

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How do I make a server accessible over the internet

I wrote a chat client and server in Java. It works but as I'm finding out, only locally. The goal is to get it to function over the web. I've tried quite a lot of things, and can elaborate if need ...
3
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1answer
84 views

Can my redundant network setup be made more robust?

With my current design I have a DL380 Gen9 running ESXi. It has redundant NICs cabled to two different switches. Those switches in turn are both cabled to a third switch that allows my workstation to ...
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1answer
31 views

Can I use a server adapter card for GigE cameras on an industrial PC?

I am building a machine vision system (gigabit ethernet cameras made by Basler), and need 5 network inputs into my industrial PC. Due to bandwidth and IP address concerns, I can't use a network switch ...
0
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1answer
30 views

Communicating between two computers located on two different ip ranges

I am attempting to have two computers communicate within a network that has three routers with 3 different IP ranges. We have an internet connection coming in at the main building, with the range of ...
0
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0answers
15 views

Is it possible to install 2 IP cameras in the same Wi-Fi network in a way that they are both visible by external networks, e.g. 3G mobile networks? [on hold]

As just stated in the title, I am having trouble installing 2 IP cameras such as these ones: Basically, they both work with Wi-Fi network, but when I switch on 3G only one of them is visible by ...
0
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0answers
10 views

Some of my clients report a route change when they reboot\refresh their IP?

I made a gaming server recently that hosted by my ISP. Some clients report a change or improvement in ping/latency times from 50ms to 20ms by rebooting their modem/router to get a new IP address, and ...
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0answers
11 views

Errno socket error [on hold]

Running Ubuntu 15 on windows 10 through vmvare. It seems it is general networking error. But I have no idea what could be triggered it or how to fix. Code: buildozer android debug Error: Traceback ...
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0answers
11 views

OpenVPN: Mac client not connecting to Xubuntu server

(Edit: left out main paragraph, this should fix it) I've been trying to configure a VPN connection between a server running on Xubuntu 14.04, and the client running on Mac OSX Yosemite with no luck. ...
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1answer
28 views

making a home webserver public [on hold]

I have a web server running apache2 on Linux mint and would like to make it accessible from any device. I am using Ethernet connection and do not have access to the modem (don't have a router also) ...
1
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1answer
35 views

How to make docker only use a private network to communicate with other hosts?

Digital Ocean provides internal IPs that are not traffic-metered. How can I configure Docker to exclusively use this private network? How to make the network interface that the docker creates docker0 ...
0
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0answers
26 views

Protocol used between a RADIUS client and a computer?

I can't find documentation about the protocol used when a computer wants to reach a network with 802.1x. RADIUS client (switch, access point) use UDP/1812-1813 to communicate with RADIUS server. How ...
0
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0answers
27 views

Tool to detect alias IPs in a network [on hold]

I'm on the lookout for a utility or tool on linux that can give me all the alias IPs used in a network. For example, if this is what I get on doing an ifconfig eth0 Link encap:Ethernet HWaddr ...
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0answers
12 views

How to make virtual device for SNMP Agent Builder testing? [on hold]

I have to make device virtually of SAN environment like Storage box and Switches for testing. I have to link these device to my SNMP Agent builder for monitoring purpose through there MIPs files. Any ...
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0answers
14 views

What happens between I transfer from a shell in a head node to that in a computer node

I'm using a HPC that uses the PBS job managing system. Usally for getting a computer node, I have to go through these process: I first login to the head node, and I get a shell ssh user@remote ...
0
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0answers
28 views

My desktop app needs to look like network requests are coming from a specific IP [on hold]

Here's my setup: An ec2 linux box with a static IP My Macbook A windows 8 vm running on my macbook A third party (i.e. black box to me) application that connects to the third party server A third ...
1
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0answers
34 views

2 IP cameras with same configuration but different behaviour

I have a Vodafone Station router, and 2 IP cameras connected to it through an Ethernet cable. Both have the same configuration. Both DHCP enabled, one has IP 192.168.1.10 with port 81 and the other ...
4
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0answers
19 views

Breakdown Windows Network IO by network adapter and by process

What I'm trying to do is breakdown the Network IO by network adapter and by Process. The goal is to identify which processes are generating the most IO on a certain network adapter. Resource Monitor ...
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0answers
22 views

Server-Client Architecture Suggestion [on hold]

Scenario : We rent a room space for our office at an IT Park in which there are 15 cubicles and each cubicle has individual port from which Lan and internet will work through. our local server will be ...
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0answers
14 views

What is the meaning of off-ramp and on-ramp [on hold]

Title pretty well describes the question I can not find a proper definition for both the terms on-ramp off-ramp in networking world , cisco particularly Can someone please explain to me what they ...
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0answers
19 views

Configuring Home network [on hold]

I have a tmobile dual band router and tp link Wr841n would like to know the best set up so I can use one as an extender with out sacrificing to much performance
0
votes
1answer
26 views

Linux PCs sending “ICMP udp port unreachable” to DNS server

So digging around in my syslog I have been noticing a lot of ICMP packets being flagged by our ASAs: %ASA-4-313005: No matching connection for ICMP error message: icmp src Internet:x.x.21.122 dst ...
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22 views

On debian, removing one virtual interface eth0:0 removes other virtual interfaces. Why?

Tried searching for the answer a lot of times. I have two virtual interfaces eth0:0(10.0.0.1) and eth0:1(10.0.0.2). I am trying to remove only eth0:0 interface. If I execute the command "ifconfig ...
0
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0answers
14 views

Cannot access File Server from one workstation but can from another with same credential

I have Small Business network with one file server and 25 workstations in workgroup. Lately I've been experiencing some difficulties. Latest: one of the user cannot sign in into network share on the ...
0
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0answers
32 views

How to raise max no of file descriptors for daemons running on Debian Jessie?

I'm playing with pgBouncer as a connection pooling system for PostgreSQL. My system is a 12-core with 64GB RAM and 1Gbps network interface running Debian 8.1. Now I want to raise the limit for open ...
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15 views

compTIA A+ 2009 objective vs 2012? [closed]

*What is the difference between the aforementioned training/certificates , and can I study the 2009 one and follow it with the differences ,or do I have to take a course aimed at the 2012 one ?
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11 views

Network IO throttling in cgroups [on hold]

cgroups allow the user to manage the resource usages of processes or groups of processes. Block IO throttling is supported and works well. Why is it however that network IO throttling (specifying hard ...
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0answers
46 views

Linux based security for companies - how much do you do? [closed]

So if your company is mostly Unix/Linux based on the server side (but mostly Windows on the client side), how do you go about securing the network and all workstations? I assume that you have a ...
2
votes
1answer
27 views

Making changes to default IPv6 route persistent in CentOS 7

I have several IPv6 addresses on a CentOS 7 server and need to make a specific v6 address the default address used in routing. I have been able to do this by modifying the route table. ip -6 route ...
1
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0answers
12 views

Are the i40e and ixgbe drivers really used by our Intel NICs?

We recently got two QCT 2U4Node high-density servers. Each node is equipped with a XL710 dual 40G NIC with two QSPF+ ports and two QCT mezz cards that sport Intel 82599 and dual 10G SPF+ ports for a ...
0
votes
1answer
18 views

VMware systems not working on SRW2048 swtich

I received an old Linksys SRW2048 gigabit switch and have used a straight-through serial cable and the console port to reset the flash config back to defaults so that it is configurable for our ...
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votes
1answer
29 views

Webserver in VPN needs IP of clients in another subnet [on hold]

I have a router connected to a VPN server at 172.16.1.1 and would like the clients connected to that router to access a webserver in that VPN, say 172.16.1.2. I need however for the webserver at ...
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2answers
18 views

Does a SIP trunk relay the RTP stream or just set up the call?

Suppose I have a SIP PBX like Asterisk and a bunch of phones registered to it, and outgoing/incoming calls are handled through a SIP trunk. Do the RTP streams go directly between the phones and the ...
1
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0answers
14 views

How do force ixgbe to pass all packet ? Not good packets only? [on hold]

I m running freebsd 10.0 with ixgbe driver . But there is difference between total rec packets and good packets. dev.ix.1.mac_stats.total_pkts_rcvd: 699587190 dev.ix.1.mac_stats.good_pkts_rcvd: ...
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votes
1answer
18 views

Inconsistent ping to my ISP backbone [closed]

this is a traceroute from My ISP to the same ISP backbone located in another city from my country here (500miles aprox) : http://i.stack.imgur.com/BbQjm.png Does this idicate a traceroute problem? ...
0
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0answers
38 views

Database connection time out intermittently between Azure web role and Sql server in Azure VM

I have an Azure cloud service web application with a web role with two instances. The database is being hosted in a virtual machine in Azure in the same data center (Amsterdam). I have end-point ...
-1
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1answer
29 views

Linux DDOS Protection / Gateway without NAT

I need help to configure a box for DDOS protection and provide external ip addresses to "internal" (which aren't really internal) servers. I have 32 IP addresses from my ISP. I want to configure a ...
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1answer
52 views

Can't Bind IP Address To Machine [closed]

I have the following IPs but I can't bind them to my machine I am getting errors. Here are the IPs I own. 2607:5300:60:1234::/64 - Came with server 158.69.123.123/29 - ...
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0answers
2 views

Can't connect to socket listening on 127.0.0.1 but works for 'localhost' [migrated]

I have a clean install of Windows 10 Pro x64 and I'm trying to run postgresql server on it. It used to work perfectly on Windows 7, but Win10 is behaving really weird: if I configure postgres to ...
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0answers
37 views

Understanding /proc/net/dev

In a Linux container I ran firefox and downloaded a large file. To my surprise after inspecting /proc/net/dev Interface| Receive | ...
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0answers
26 views

Can't connect to the mapped drive in the server [closed]

I'm using windows 2012 server and the client is windows xp. There is no user in the server who is in the client, so I used the user in the server who has the authority over the server with password ...
0
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0answers
19 views

Server is using MAC address of eth1 when connecting to eth0?

I have a server with 10.10.1.1 on eth0 and 10.10.2.1 on eth1. The routing table has 10.10.1.254 as it's default gateway. There's a freenas box on 10.10.1.200 which keeps reporting that 10.10.1.1 has ...
0
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0answers
25 views

Bridge server for connecting two databases?

I'm in a bit of a pickle. I currently have 2 database servers. One is hosted in the US and is online on the internet. The other is local, working only on LAN and external connections are not allowed. ...
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0answers
13 views

Accessing remote application from a network VIA VLAN

I have a VLAN network (target network), where I'll connect to a remote system from my network and take remote desktop and work. So my machine is connected to the target network through VLAN. My ...
0
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2answers
41 views

How to log all inbound connections on Windows server

I need to log a summary of all inbound TCP connections on a Windows 2008R2 server, but only including the Source IP, Source Port, Destination IP and Destination Port. I do not want to log the payload ...
0
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0answers
11 views

Redirect destination or rewrite destination in shorewall

My shorewall firewall running on debian nicely. I have 2 server outside from my network. All my client access server A some reason i want client access to server B without changeing ip address or dns ...
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0answers
5 views

Wireless to Wired Bridge in Windows while keeping settings [closed]

So I have a wireless PC and next to it is a PC that only has a wired connection. So I thought well this is simple I'll just use a bridge in windows, so we can connect to the internet and still play ...
0
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0answers
32 views

Debian Openvpn port closed

Newbie in linux! there is already similar questions are asked here, but the solutions are not working for me. can somebody help me with this issue: I have been installed openvpn server on debian 8.1 ...
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0answers
101 views

Application Crash after inactivity Application Event ID: 1026, 1000, 1005, 1001. Security Event ID: 5061

For several months now I have a problem with my 3rd party application. After some inactivity on application, application crash. What I checked: Network. Updates (without servers, on PC and server ...
0
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1answer
20 views

Issue with bind_ip on mongodb mon Virtualbox

I have been struggling with mongo bind IP for a while , I think this is the time to shout for help. I am using hostonly network 192.168.56.0/24 . I have 4 boxes. 3 boxes for mongo ...
2
votes
1answer
44 views

pfSense can't access https website

I have just installed pfSense on a PC Engines APU1D4 to evaluate as an alternative to a Soekris 5501 + OpenBSD based setup, I have a PPPoE WAN configuration. The pf rules, NAT and PPPoE ...