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

learn more… | top users | synonyms (1)

-2
votes
1answer
27 views

One way network bridge

I have two networks, with a single machine sitting on both (two NICs) shown below. That machine is Linux. I was hoping to set up a bridge of some sort so that work stations on the 192.168.1.x ...
0
votes
0answers
6 views

Configuration snort IDS

I have installed snort on my windows 7 machine. But during configuration of snort, it gives me the following error. ERROR: c:\Snort\etc\c:\Snort\rules\app-detect.rules(0> Unable to open rules ...
-1
votes
0answers
25 views

How to determine optimal fiber cable length?

We are going to send several servers for colo in a datacenter where we got 20U space (half a cabinet). Our configuration includes 1x4U, 1x2U and 1x1U servers and 1U for a switch. They'll all be ...
0
votes
1answer
28 views

How to share two ISP in two router configuration?

I have two router configured in lab. To configure network redundancy, I want to configure one ISP on each router. So if network on one router goes down, we will have the network connectivity from ...
0
votes
1answer
26 views

Route all network traffic through an openvpn connection and also accepting incoming requests on the hosts' real IP-address

Is it possible to accept incoming connections that are made from an extern client to a host its (real) IP-address when routing all the traffic from the host through a VPN tunnel? I want to configure ...
0
votes
0answers
13 views

Changing the subnet of docker0 in Fedora Core 23 [on hold]

I'm setting myself up a new docker host and I wanted to configure the subnet / ip-range used for docker0. Unfortunately, it doesn't seem to be as simple as just changing the parameters in ...
-1
votes
0answers
9 views

Suddenly unable to connect to some game servers like Steam, Agar.io etc [on hold]

Serverfault isn't letting me post my problem because it reports it as "spam", so the link below is my post on bleeping computer. Please help me with my issue. ...
0
votes
0answers
14 views

Running Apache2 in xenserver

I am trying to run my own squirrelmail email server. This involves the use of apache2, postfix, and squirrelmail. When I first boot up the server everything will work fine, but after about 1 - 2 ...
0
votes
0answers
11 views

DNS forwarder to ingest client-subnet as EDNS option in outgoing query

I am looking for DNS forwarder able to apply following logic to forwarded queries: - If EDNS client-subnet option present in query from client, preserve it - Otherwise, calculate client-subnet from ...
0
votes
0answers
11 views

I'm having random nfs slow downs on my nfsv4 gigabit network which cause videos to slow down then speed up

I've noticed this issue happen in two different video players so I'm pretty sure it's a network problem. I'm running Ubuntu with the kernel 4.2.0-35-generic. Here is the result of my nfsstat -4 -s ...
0
votes
0answers
12 views

Issue with nfsen in fetching sflow data from Linux host

I have two VMs. The first VM is at AWS EC2 instance (red hat). I am using this system as sflow agent. I have installed hsflowd in this machine. My hsflowd.conf file looks like following: DNSSD = ...
0
votes
0answers
22 views

How to use SNMP to read all the 802.11 probe request messages on an accesspoint [on hold]

each Wi-fi clients send probe request to all access points around. I want to programmatically read all 802.11 probe request messages on each an access point in our building. How to use SNMP from any ...
0
votes
0answers
15 views

Network connections on aws ec2 in poll_s

Our long running mail server on aws ec2 suddenly faced network related bottlenecks today. The pop service was running at its limit, still end users complained of connection errors and duplicate mail. ...
-1
votes
0answers
19 views

Linux server redundancy and load balancing

This is a question based on research to to a design project i've been working on. As you can see from the diagram below, a mikrotik vpn server has been setup to accept wireless traffic from over 100 ...
0
votes
0answers
29 views

Forward port 80 to 8080 for a specific IP on the network

I have a specific PC on my network running a web service on port 8080. I also have a different machine which acts as a gateway/router, which I configure using iptables rules. What I want to do is ...
1
vote
1answer
32 views

Figuring out the most efficient use of an ip range

I am working with Packet Tracer atm and have 3 subnet plans : assigned(management(104users) staff(43 users) admin(35 users)). I have an ip address range of:38.191.0.0 and subnet mask of ...
2
votes
0answers
39 views

Routed bridge networking for KVM guests along with eth1 alias interfaces for shared hosting with dedicated IPs for each virtualhost

First question here on serverfault, so kind of a newbie, all feedback is welcome. I have a dedicated server running Debian GNU/Linux 8.4 (jessie) with one public IP and multiple additional public IPs ...
1
vote
1answer
44 views

fast ping response, latency on traceroute

I have a very strange problem. In short pings to my wireless AP are low (around 1ms), however, once I do a traceroute, the latency to the AP (1st hop) suddenly jumps to ~1000ms. Any ideas what may be ...
0
votes
2answers
82 views

How to calculator IP range and subnets?

I am trying to find exact formula for finding the IP ranges for the below sample input 10.144.26.192/28 I am getting different IP count in different portals. I used the below online IP range ...
0
votes
2answers
130 views

Why is fragmentation done on layer 3 (Network layer)? [on hold]

Why is fragmentation done on network layer and why not on other layers ? Fragmentation means splitting the packet into to small pieces and sent from source to destination. The maximum MTU size is ...
-1
votes
1answer
19 views

routing laptop to give raspberry pi internet access [on hold]

I connected my raspberry pi to my laptop (Windows 10) through direct ethernet connection. Pi is 192.168.1.250 and laptop ethernet is set to 192.168.1.180. I will have internet connection through wifi ...
0
votes
0answers
7 views

Vagrant Public Network, IP, Using .dev [migrated]

My end goal is this: Create a public networked Vagrant box with Computer1 that is accessible via LAN/Wi-Fi with a local domain like example.dev. First off, I have read this question on Vagrant Public ...
0
votes
1answer
40 views

ISP “hide” packet trace route

Yesterday , i've discovered changes in my network , our ISP hides trace route . ie : traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets 1 192.168.88.1 (192.168.55.1) 0.256 ms 0.251 ...
0
votes
1answer
29 views

Same script, same OS, same installation, failing

So I'm working with RANCID to monitor some switches and I'm using clogin now to test some modifications. I'm working in two different computers but both of them from the office. Althought they are ...
-1
votes
0answers
16 views

Will this setup cause a Bottleneck Connection / Speed issues? [migrated]

I'll have one cat6 cable running from my router to a switch. That switch will then give internet and network access to 5+ devices. Will this cause a bottleneck / anything negative if all devices are ...
-1
votes
0answers
13 views

Cannot connect to network from inside Virtualbox (Windows Host, Gentoo Guest) [closed]

I recently got my computer upgraded from windows 8 to 10, and since then, I've been having trouble getting the internet to work. I was hoping that someone could give me some advice on how to debug ...
0
votes
2answers
23 views

Graph zabbix and time navigator have different time periods

why the time zone is different between the server zabbix ubuntu and console of zabbix ? the server time zone is ok (utc) but not right in the console(browser) l tried the command dpk-reconfigure ...
-1
votes
1answer
42 views

Point of Sale Terminal Crashing the Network

We look after a series of restaurants which is a collection of point of sale terminals and a typically a single workstation per site. We have one site that is causing a fair amount of head ache and ...
-1
votes
2answers
50 views

Win 2012 server will not resolve domains using web browser, PING or NSLOOKUP, yet services on server are working

This is a windows 2012 server running SQL 2014. The server does not seem to be able to resolve IP address when given a domain name. The problem first showed itself when I tried to go to a web page ...
0
votes
0answers
35 views

Hyper-V vm can ping host but host cannot ping Hyper-V vm?

When ping host from hyper-v VM, it works both with ipv4 or ipv6. Pinging MyHost [fe80::3549:ee49:a75c:619c%9] with 32 bytes of data: Reply from fe80::3549:ee49:a75c:619c%9: time<1ms Reply from ...
0
votes
2answers
31 views

Tool for diagnosis/proof of network connectivity issues

I am in a shared workspace and am trying to communicate the issues I am having with the internet performance to the workspace provider. The main issue I have other than slowness is momentary ...
1
vote
0answers
22 views

debugging “eth interface using wrong IP” on server

My Uni provided me two hostnames and static IPs for two interfaces on my Fedora Server 23. My idea is to use one hostname for production and another for dev branches. It should work as: bio-db.uni.edu ...
0
votes
0answers
24 views

How Dns Server keep tracks [closed]

I was quite eager to understand, how does DNS server work. Scenario If i do a DNS query, it reaches to local DNS server, Now Local DNS server checks locally,if information is not present,it queries ...
2
votes
1answer
48 views

Debian : SSH port attack continues, cannot change port coz of provider, suggestions?

We have a debian server, which is running our Tomcat hosted applications and we have installed Fail2Ban on it. Everyday morning I see that a lot of people on the internet try to attack the server. ...
1
vote
0answers
10 views

OSX Network: Incoming traffic interface and outgoing traffic interface are not the same [closed]

I'm on OSX El Capitan / Yosemite, and I've a strange behavior. I have the ethernet and Wifi interface enabled. The network interface order is set to WiFi then Ethernet, due to some proxy limitation ...
0
votes
0answers
7 views

Handling time based events within a cluster [closed]

I have a Java app which loads up records from a database and then executes something every x mins/seconds, in a one machine environment, this works fine, however if this was to be run in a cluster, I ...
-1
votes
2answers
52 views

Is it really that easy to move this network?

I am just wondering if maybe I am over simplifying things here. I have a network housed in one data center in Seattle. We will be moving out of that data center this weekend. For the sake of keeping ...
0
votes
0answers
23 views

dhcpd.conf options for different subnets when layer 3 switch is doing the routing

We have a flat networks in our offices and I have been tasked with creating new vlans to compartmentalize traffic. Our current network is 10..0.0 (default vlan on our switch) with a CIDR of /24, ...
0
votes
0answers
11 views

foreman, DHCP smart proxy, network set-up

How would I go about setting foreman up so it hands out a lease to any machine I connect to one of its interfaces using a private IP in the 192.168-range during provisioning, but to supply the client ...
0
votes
2answers
35 views

how to release shared files' locks from other systems before server downtime - with Powershell?

Is there a way to use Powershell to clean up/release file locks on a server when it's time to upgrade? we have other systems connecting to the server's shared resources over the network and some files ...
0
votes
1answer
18 views

net use - error code 1219

I am trying to understand what causes the error code 1219 (multiple connections to server by same user). The background of my question, we are currently installing a machine at a customer, where our ...
0
votes
0answers
20 views

Amazon EC2 openVPN instance connection issues

Currently trying to connect to an openVPN server set up on an EC2 instance that is also running a web application. My client establishes a connection with the server and I can ping the gateway ...
0
votes
0answers
11 views

IPsec tunnel, receiving data with wrong destination address

I've managed to stablish an IPsec tunnel using strongswan to a Cisco router. My server is an Azure VM, so it is behind NAT. I do not have control over the Cisco router. This is my /etc/ipsec.conf: ...
0
votes
0answers
26 views

What is wrong with my IKEv2 configuration, and how can I fix it?

I've attempted to set up an IKEv2 VPN on my DigitalOcean server following this guide. So far, I get a connection, but I can't seem to send any data through it at all. I'm not sure what's going on or ...
0
votes
0answers
25 views

create a PPTP VPN server to act same as PureVPN PPTP server?

I'm new in networking. Our ISPs are providing us with private IP addresses so port forwarding is not possible, They are offering fixed IP addresses but with extremely high price so the only option is ...
-2
votes
0answers
33 views

A DIFFICULT CONFIGURATION OF 2 NICs

I have 2 network card: elan01: The work network with proxy, I use this for all the system and for the internet. I want to use this for almost every page. wlan01. I connect this direct to a ISP, but ...
1
vote
1answer
40 views

Debugging why network packets are being dropped

Preface: I have an application that I am currently testing out that runs on RHEL 6. The setup for my test is the application installed on a embedded device, connected by an Ethernet cable to PC that ...
1
vote
1answer
22 views

How to redirect traffic through IPv6 IPSec (strongswan) gateway?

I'm trying to set up IPSec secured connection to the gateway. Have three hosts: A: eth1 - fec0:1::1/64 B: eth1 - fec0:1::2/64 eth2 - fec0:2::2/64 which is gateway between A and C; forwarding is set ...
1
vote
1answer
27 views

Splitting a single fiber connection with multiple public IPs to two separate routers

We have a single WAN connection coming into our office and have 5 public IP addresses from our ISP. We have 2 separate entities underneath our main company and I want to be able to completely split ...
0
votes
2answers
40 views

VPN Connectivity

My office has VPN connectivity with client network which allows us to access internal applications at client side. My company is setting up another office in different location for which we need ...