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

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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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15 views

Tool to detect alias IPs in a network

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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7 views

How to make virtual device for SNMP Agent Builder testing?

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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7 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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19 views

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

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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21 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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16 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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20 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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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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17 views

Configuring Home network

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
20 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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19 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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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 ...
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0answers
22 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? [on hold]

*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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10 views

Network IO throttling in cgroups

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
43 views

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

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
26 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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10 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 ...
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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 ...
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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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10 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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13 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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1answer
16 views

Inconsistent ping to my ISP backbone [on hold]

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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30 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 ...
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1answer
28 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
51 views

Can't Bind IP Address To Machine [on hold]

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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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
35 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
24 views

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

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 ...
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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 ...
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24 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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12 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 ...
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2answers
39 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 ...
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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 [on hold]

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 ...
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30 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
78 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
17 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
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1answer
39 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 ...
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0answers
12 views

Linux GRE tunnel [closed]

Is it possible to setup a GRE tunnel without IPTables? My situation - Server with 5 additional IPs (6 IPs in total, 5 alias IPs;IPv4) with 10Gbps DDoS protection Another server with 2 IPs (one ...
2
votes
1answer
26 views

Getting Bonding Status in CentOS 7

In CentOS 6 I had my trusty /proc/net/bonding/bond0 that would give me the following information: [kbrandt@ny-tsdb01: ~] cat /proc/net/bonding/bond0 Ethernet Channel Bonding Driver: v3.7.1 (April 27, ...
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0answers
35 views

Access OpenVPN Clients

I'm currently having some dificulties configuring my network to a new openvpn connection. I'll try to be clear as possible. This is our network diagram. I have a OpenVPN Server installed on ...
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3answers
31 views

Easy way to convert PC within network to image server? [closed]

Maybe the question is a little misleading, so here goes. Without installing IIS or any other web server, is it possible to "host" images on a Windows 7 PC? Assuming my laptop in the network is called ...
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13 views

How to bridge VIP interface on Ubuntu

I am running Ubuntu 14.04 on OSX guest through VB 5.0 Rooter Gateway is 192.168.0.1 Vbox0 is 192.168.56.1 Ubuntu has now 2 interfaces configured: # static iface eth0 inet static address ...
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1answer
20 views

Server abandons set static ip and returns to dhcp given address

I have a few virtualized (ubuntu 14.04 LTS) servers under KVM that I'm trying to move to an ip block other than the one reserved for servers under dhcp (the 10.10.2.0/24 block). I change the ip and ...
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1answer
25 views

Need to download Outlook files from webmail, no Outlook synchronization available

We recently moved our DNS from GoDaddy to our own internal server, which implies all the necessary DNS records have also changed. We had an IT guy backup all Outlook files before we changed DNS hosts ...
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0answers
25 views

New windows 7 pc can't ping XP machine. XP machine can ping windws 7 pc [closed]

Replaced XP machine with new Windows 7 PC. New PC cannot ping 1 existing XP machine. XP machine can ping new Windows 7 PC. Other PCs can ping both. All machines connected via ethernet to single dsl ...
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0answers
29 views

Prevent network saturation with DVR video recorders [on hold]

I'm planning to connect a dvr with ip cameras that provide hd video. I do not want to slow down the lan network because of the constant data stream provided by the ip cameras but I also want to be ...
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0answers
16 views

fatal error connection timed out [closed]

Since 14/08, I started having issues accessing my VM on its IP, but I could connect through SSH. IP: 104.155.16.169 Since 17/08, I also get connection timed out both through SSH and gcloud (gcloud ...