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 calculate printer average-toner-coverage used per page using SNMP

I want to know the rage toner used per page, for example: for one page print was used x toner for other page print was uses 2X toner I suppose are some SNMP mibs/oids to do this; some idea ?
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3answers
93 views

IP forwarding on Linux

I have three machines Source Machine Destination Machine - IP 10.20.30.40 Intermediate Machine - Host server1.test.com Source machine has SSH access to Intermediate machine and Intermediate machine ...
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1answer
40 views

One way network bridge [closed]

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 ...
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12 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 "c:\...
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1answer
37 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 ...
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4answers
409 views

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

I am searching for a solution to route all traffic from a server through OpenVPN but keep it possible to host applications on the server which can be accessed outside of the local area network. To ...
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1answer
69 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 ...
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18 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 ...
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32 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 -...
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0answers
40 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 = ...
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17 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. ...
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41 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 ...
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1answer
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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 255.255....
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1answer
131 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 ...
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1answer
48 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 ...
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2answers
135 views

How to calculator IP range and subnets? [closed]

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 ...
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2answers
208 views

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

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 ...
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1answer
49 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 ...
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1answer
31 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 ...
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2answers
46 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 ...
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1answer
53 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 ...
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2answers
79 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 ...
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1answer
125 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 ...
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2answers
36 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 ...
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29 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 ...
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1answer
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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. ...
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0answers
11 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 ...
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2answers
82 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 ...
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38 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, ...
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0answers
41 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 ...
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2answers
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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 ...
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1answer
24 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 ...
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0answers
26 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 (10.8....
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0answers
13 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: ...
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59 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 ...
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1answer
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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 ...
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1answer
42 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 ...
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1answer
35 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 ...
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2answers
48 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 ...
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0answers
16 views

connect a DSL modem with another router to load balance

How to load balance two different ISP connection one via DSL modem and another through a Dongle as iam using an ASUS router in between them.Iam a networking guy im new to it please help!
4
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1answer
42 views

Can HP Virtual Connect modules be used as a layer 2 switch?

I have an HP C7000 enclosure which I recently upgraded with a pair of HP Flex-10 Virtual Connect Ethernet modules (HP PN: 455880-B21). Each module has 16 downlink ports to connect to server blades ...
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38 views

Unable to set server IP address

I have a SBS2011 server that I have virtualised and now need to set the IP address for the network adapter. Initially I was warned that the IP was allocated to a device that no longer exists which ...
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1answer
59 views

Connection refused to local port

I'm trying to setup a dedicated server for Rust (a game) on an AWS EC2 VPC instance running Ubuntu 14.04 64-bit. Following the instructions, I got the application started and listening on its default ...
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1answer
54 views

Create vxlan - RTNETLINK answers: Operation not supported

I knew nothing of vxlan until about 30 minutes ago, however I've come up with an issue installing OpenStack, which is vxlan related. Trying to create a vxlan on an interface on Ubuntu 14.04 (kernel 3....
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1answer
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How can I only allow TCP connections for 1 port using iptables on Unbantu? How can I also set a maximum packet on a connection?

I'm running a server for public. I just want to allow TCP connections and I want to limit the packet to prevent ddosing a bit and setting a maximum IP/new connections per seconds with iptables. How ...
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0answers
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ifconfig output different for non-root user

we use a montoring system to capture network traffic. the output as root user is fine: eth0 Link encap:Ethernet HWaddr 00:1E:67:E6:D6:FE inet addr:149.56.19.13 Bcast:149.56.19.255 ...
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2answers
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Is order of network routes important in Linux?

On one of my web server the loopback route is in 2nd position and usually it is in 3rd position on other server when displaying the routes: >ip route show Results on what is displayed on one ...
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33 views

Kvm virtualization packet loss on guest machine

In Ubuntu 14.04(64-bit) by using KVM virtualization and bridging network I have about 10% packet loss in my guest machine and I have no packet loss on host machine. server1@xxxx:~$ uname -a Linux ir1 ...
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1answer
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Addon domain redirects to Main Domain

I have a VPS from Ramnode which I am using to host my primary domain http://african-dreamtravel.de/ and I went on adding another domain (http://www.lagerregal-pruefen.de/) to the VPS today. Although, ...
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2answers
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Measuring 40Gbe performance

I've connected two hosts via a 40Gbe fibre link and would like to determine a baseline for data transfer between them. I'm seeing relatively low speeds (~620MB/s). It seems that the signalling rate is ...