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

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IP design for medium sized network

I have been reading a lot to refresh my memory of ip design set up. It's been years I have to go back to this because I have only had to support a small network and am very similar with setting up ...
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10 views

Nat64 - IPV6 Migration

My ISP (dual stack) do not provide public ipv4 and ipv6 only. I am full of doubts about what to do in my network to have remote access that was once by ipv4 + port. I use no-ip for DNS and from what ...
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9 views

Cyberoam UTM console accessible from outside network Is it secure?

A organisation is running Cyberoam UTM for securing their network from malicious activity from outside network and inside network also. Now, company has given a feasibility to his administrator to ...
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7 views

docker0 boot2docker network changing between restarts

I'm experiencing an issue where after restarting my boot2docker VM the docker0 network segment changes between 172.17.0.0/16 to 172.18.0.0/16 That is a problem since I have a DNS container running ...
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0answers
21 views

Cannot get client to pass DNS queries through openVPN tunnel

I cannot get my openVPN client machine (Windows 10) to pass DNS queries through the VPN tunnel. I am pushing 10.0.0.1 as a DNS server and the VPN connection shows that it is the DNS server for that ...
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7 views

Deploying MongoDB replica sets on two physical machines(in LAN).How to configure ACL ,network parameters and firewalls?

Unable to add a replica set to the primary node. It is saying "not all the replica sets responded affirmatively and something..........". This could be something related to Access Control List , ...
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0answers
28 views

Debian - No internet traffic, wget fails. Ping, DNS & telnet work

I have an internet connection issue with several computers on a KVM serer, which is also having the same issue. The internet connection on Windows guests works fine. This is happening on multiple ...
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0answers
21 views

Use client ip adress from server

How would you do this: You have a server with a website, and this website offers a service to log in to a few other online accounts on behalf of a website visitor. The only problem is maintaining the ...
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0answers
20 views

How do I change the hostname of an HP PS1810-8G switch? [on hold]

I've got an HP PS1810-8G switch and I need to change the hostname of it. I've logged in to the web admin and set the System Name under Status > System Description and restarted the box but the ...
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1answer
22 views

Bind: Disabling DNS forwarder won't block resolving out-of-network names

I have disabled my local network DNS forwarder. But somehow internet names are still get resolved. Any idea how to stop this from happening?
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17 views

Networking between host and virtual machine loopback

I got a problem with my vmware guest and host networking. On my vm, a 3rd party company send me vm image to test our product before live environment. As default my vm specs ; Win server 2008 and lot ...
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0answers
13 views

WAN bonding to a VPN server

We have some network issues with our ISP's and almost always have one WAN link down/repairing. We currently use WAN Failover, however this cuts out our SIP calls midway. I want to join three ...
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27 views

Networking Aix and LINUX [on hold]

I can't able to ping servers on different network . But for only one servers it happens. I can able to ping all other servers except one . Could you please tell me why it happens ? What are the thing ...
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0answers
30 views

Domain Controller unable to authenticate Static IP workstation/server

I have an exchange server which was on a static IP (192.168.10.3) previously, failed to communicate with my all-in-one domain controller (192.168.10.2) out of a sudden. The only way to get it working ...
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0answers
22 views

IP Failover/Load Balancer [on hold]

I'm helping a friend move from go daddy to linode. This is what they told me how they have it setup. They have 2 lamp stack servers on linode. Both have mysql and apache running website. They have ...
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33 views

Remote user cannot ping server intermittently

A remote user sometimes is unable to make a connection to the server. Ping command times out and tracert reaches about 12 hops and then times out until reaching 30 and stopping. It times out after ...
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0answers
18 views

How do I make a server accessible over the internet [migrated]

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 ...
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1answer
137 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
34 views

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

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 ...
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2answers
40 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 ...
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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
12 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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12 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 [closed]

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) ...
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1answer
42 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 ...
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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 ...
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29 views

Tool to detect alias IPs in a network [closed]

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
13 views

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

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 ...
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28 views

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

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 ...
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0answers
38 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 ...
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23 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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22 views

Server-Client Architecture Suggestion [closed]

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 [closed]

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 [closed]

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
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1answer
35 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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23 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 ...
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16 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 ...
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1answer
47 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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0answers
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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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
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1answer
29 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 ...
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13 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
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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 ...
-1
votes
1answer
29 views

Webserver in VPN needs IP of clients in another subnet [closed]

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
20 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 ...
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15 views

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

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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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? ...
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1answer
32 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
53 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 - ...