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

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2answers
80 views

Different subnet mask on router and DHCP server

ran into something funny today and am still scratching my head on why this happened. I was trying to increase the number of ip addresses available from my dhcp server by changing the netmask from /24 ...
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0answers
23 views

SYN/ACK not received by iperf client?

I have an application that essentially consists of four components A, B, C, D. A and B are on the same machine - B and C are separate machines. Traffic is generated by an iperf client on A with a ...
1
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0answers
107 views

Access local network resources remotely using OpenVPN [closed]

I've been banging my head against the wall on this for a week, so thought I'd finally turn to the experts. Much appreciated for any help. What I'm trying to do: I have some resources on my local ...
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1answer
37 views

netsh command to add interface

I am working with Windows 2012 R2 Core and I having problems with setting up my NICs after they got reset. When I run "netsh int show int" it shows bother Interfaces as Enabled and Connected. ...
0
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2answers
77 views

How to get a client IP address from a specific network?

I have a condition to filtering IP address from client, and I just have their IP network like this 1.1.0.0/17. If some client from this network will be filtered as special user on my website. And I ...
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votes
1answer
24 views

Azure Virtual Network Custom DNS

I created a virtual network and put 2 VMs in one subnet. But they were not able to ping each other using their hostnames. I need a DNS Server implemented so that hostnames in the subnet can be ...
-1
votes
1answer
37 views

Connect to repo IP address A if it is up, else connect to repo IP address B (Client side) [closed]

There's an SVN repo hosted in a server behind multiple ISPs, and depending on the ISP connection, the admin of that SVN server changes the repo's IP address and announces "hey, our IP address changed. ...
0
votes
1answer
53 views

NIC seems slow, even on 100Mb/s full duplex [closed]

So I have a server running Centos 6 64bit with cPanel. It's set on eth0 running at 100MB/s full duplex. But, one particular server seems sluggish on its connectivity, despite server load being minimal ...
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0answers
10 views

Application Virtualization Risk Through WAN / Internet

I was weighing pros and cons about the new mission critical system that through application virtualization, will allow my colleagues from 3 different countries to access it. Here are some background ...
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2answers
45 views

Will setting up a VPN prevent others from seeing what is on the network? [closed]

I have a computer in the house that is used for a work from home call center business. Part of their contract is for nothing else to be connected to the network (wired or wifi) during work hours. ...
-1
votes
1answer
31 views

can I keep company-purchased IP addresses when migrating to AWS (or other hosted service) [closed]

We currently run our own data center and want to migrate to AWS. Because we send a lot of email, we want to retain the IP addresses that we have purchased (they have a good reputation with ISPs) Will ...
0
votes
1answer
30 views

Can't connect php to SQL server, error:0

I've set up an internal Ubuntu 14.04 LAMP server. I can access SQL when using Putty, but when I try to connect via php script all my pages were blank... Then I tried to debug it by simply connecting ...
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2answers
13 views

Modsecurity rule to not scan URIs

Good Morning, I am currently on creating a new mod security 2.5 rule. My deployment: I have an Apache server in reverse proxy mode. This Apache server does not host the websites. Instead, I proxy ...
1
vote
1answer
56 views

Incoming SSH works, but all outgoing fails

Terminology I have a server (I'll refer to it as S1 ) running in the cloud, but it is misbehaving. I also have another server (S2) running in the same cloud network, connected to S1 through a ...
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0answers
35 views

Two processes stuck on network communication

We have had hang on our Oracle extraction process very intermittantly. Nothing obvious from the Oracle side, and starting to think it is more network related. There are two Oracle processes ...
1
vote
1answer
30 views

Removing a computer from the domain

I'm a small business owner, I did have a server in my office but recently de-commissioned it and paid an IT company to come and do whatever was needed to remove the computers from its control. They ...
3
votes
4answers
182 views

How to find all hostnames (even laptops that aren't currently on the network) on a network?

I manage a network that has a lot of laptops. The users that use the laptops are frequently traveling. When someone gets a new computer I run into a problem determining what the hostname should be. ...
0
votes
1answer
46 views

Setting up site-to-site IPsec in bridged mode

I'd like to set up site-to-site IPsec in bridged mode: that is, where the hosts in each site don't need to be modified to use the IPsec gateway, but the IPsec gateway acts as a pseudowire. My plan to ...
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0answers
18 views

Log network traffic from a specific process

I would like to track all the network traffic coming from and to specific processes. I don't need very detailed information, more like the total data volume, protocols, ports and addresses. Something ...
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0answers
11 views

How does IPSec right=%any setup the SA?

I've seen lots of examples where each gateway in an IPSec is configured with right=%any. I'm perplexed how these gateways find the IP to connect to (assuming both gateways are set up that way). The ...
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0answers
33 views

Openswan VPN routing issue

I have configured the openswan VPN correctly on an EC2 server ( Elastic IP ), and it shows 2 tunnels up. Given the following setup : MY_PUBLIC_IP: x.x.x.193, MY_ENCRYPTION_DOMAIN: ...
1
vote
1answer
252 views

Nic Teaming Windows Server 2012 R2 - No network connection

I have 2 100Mbps NIC cards installed into PCIe slots and connected each card to it's own desktop 8 port switch. My Settings: Mode: switch-independent Load Balancing: Dynamic / Address Hash VLAN: ...
0
votes
1answer
64 views

10GBASE-T Performance in Windows 7

This is my scenario: -Workstation1: CPU i7-3770 / 16GB ram / Gigabyte Z77-D3H motherboard / Crucial CT256MX100SSD1 Sysyem Disk / Network adapter intel X540-T1 / Windows 7 64bit -Workstation2: CPU ...
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votes
0answers
61 views

Connecting a private IP and a Public IP through one server on dual NIC

I have a Centos box with dual onboard Ethernet ports. My hopes are to have Eth0 as the Public IP coming from the ISP Bridged router and Eth1 connected to a local router for internal purposes. ...
1
vote
1answer
46 views

BIND and OpenVPN on the same port (different IP and interfaces)

I have 2 network interfaces: eth0 has IPv4 104.x.y.44 and eth1 has 104.x.y.38. BIND is listening on 104.x.y.44:53 and I want OpenVPN to be on 104.x.y.38:53 (udp mode). However OpenVPN fails to start: ...
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0answers
57 views

Qnap ts-231 afp slow upload speed

I'm now using Qnap TS-231 with Linksys EA6500v2. When I connect the NAS via smb protocol everything seems right and the upload/download speed could reach 40MB/s between my Macbook and NAS. But when I ...
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votes
1answer
63 views

AD Best Practice for the connection specific DNS suffix network setting

What is best practice for this setting? It also goes by DNS Domain Name in DHCP scope settings. The only documentation I can find about these suffixes and domain name settings specifies the the ...
0
votes
0answers
68 views

/etc/network/if-pre-up.d/iptables script makeeth interfaces disappear in debian jessie?

I need to enable NAT on my VM in iptables. I followed official debian instruction to configure it: First of all, i created /etc/iptables.rules file with following content: *nat -A ...
-3
votes
1answer
52 views

3 internet line in a single network

i'm going to bond 3 internet line in a single network. i'm using Mikrotik RB750 router, I configured this router like this: /ip firewall mangle add chain=input in-interface=WAN2 ...
0
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0answers
17 views

Why two network with NAToverload not communicate?

I have two private networks: 192.168.1.0 192.168.2.0 These networks communicate with each other via static routing, but when I set up the NAT overload, they don't communicate. Why? I examined the ...
1
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0answers
20 views

sharp 5110n won't scan to email addresses outside the organization. It scans to internal emails on exchange, server and prints fine [closed]

We checked the the receive connector in exchange 2013 and the sharp has the same setting as two other working canon printer. Not one thing in the configuration is different. It just doesn't make any ...
1
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0answers
34 views

How to connect to two different internal networks at the same time

I am still new at this, so please be gentle. My company recently got our accounting department a small Cisco 877W router so that they can connect to the Internet via DSL. The 877W is setup with DHCP ...
0
votes
1answer
85 views

Why i can't access computers in LAN behind OpenVPN server?

On ESXI server i have several VMs: one with external ip address (and internet access), that is configured as NAT (and plays OpenVPN server role) and several VMs in VLAN (using 192.168.182.*/28 ip ...
1
vote
1answer
50 views

Are two IPs with different subnet masks but same netword IDs on the same network? [duplicate]

I can't figure this out. I have two IPs, and two subnet masks: IP1: 10.150.1.4 SM: 255.255.255.248 IP2: 10.150.1.6 SM: 255.255.255.224 These two hosts both have the same Network ID (10.150.1.0) ...
0
votes
1answer
34 views

change destination of IP in windows

I have a windows machine (A) which uses a software to contact another machine (B) via it's IP, 111.111.111.111. That IP address is hardcoded inside the software and the problem is that it soon going ...
-1
votes
2answers
22 views

IP from multi gateway, openvz debian

I have a problem with network in my dedicated server. I have a host: ip 188.60.240.71 netmask 255.255.255.128 gateway 188.60.240.1 broadcast 188.60.240.127 network 188.60.240.0 I order additional ...
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votes
1answer
37 views

How to do remote server/virtual server management job? [closed]

I have recently learnt about the server management. While looking for freelance job, I have seen a post about managing 1200 servers. I got curious how a group of people can manage some thousands of ...
0
votes
1answer
45 views

Why can I copy a file faster over the network than file to file on my SSD drive?

Dell Server running 2012 R2 w/ SSD's, Dell workstation running Win 8.1 w/ SSD's. I wanted to make a copy of a vmhd file so I just did a local copy/paste on the disk where the vmhd file was. When the ...
1
vote
2answers
108 views

What is the ipv6 equivalent of 0.0.0.0/0

When describing IPv4 networks, I can use 0.0.0.0/0 or just 0/0 to specify all networks. What is the equivalent notation for IPv6?
0
votes
1answer
84 views

Internal URL redirect to particular server and port

What is the easiest way or what options do I have in order to create an alternative internal URL on our network to access a particular internal website? For example I have just installed the ...
-2
votes
1answer
30 views

How can I resolve/route private hosts over an SSH Tunnel?

I'd like to setup an ssh tunnel from a remote location to a private web server on our LAN. The web server on the LAN is using Virtual Hosts and there is some redirection going on. Sometimes a user ...
0
votes
3answers
89 views

Windows welcome screen delay

I'm having an issue with 50+ laptop/desktop machines. When the user logs into the machine with a wired/wireless connection it usually takes up to 5 minutes to get past the "Welcome screen" on Windows ...
0
votes
1answer
61 views

How do you use a SOCKS proxy?

I intended to call this question: "Are SOCKS proxies still relevant?" but thought it would be too vague. I know there are various SOCKS proxies that are actively maintained and developed (like ...
0
votes
1answer
44 views

Only second ping succeeds - maybe arp?

i tried to set up a local network without any routers etc. Components are one notebook (Win7), a compact embedded 2013 board with two lan interfaces and a pc(Win 7) with also two lan interfaces. The ...
1
vote
1answer
33 views

Can't change source IP address (to floating ip) for udp outgoing packages

I'm having trouble getting a cluster to work using pacemaker and corosync. Here is my hardware configuration: Network: 192.168.3.0/255.255.255.0 Gateway: 192.168.3.1 node1 (Ubuntu Server 12.04 x64) ...
0
votes
1answer
63 views

How to assign multiple IPv6 Alias addresses to one network interface

I have an IPv6 Range which i am trying to assign on a centos6 server. I have updated my below files for IPv6 configuration: [root@test ~]# cat /etc/sysconfig/network NETWORKING=yes ...
0
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0answers
61 views

When does “Determining if ip address x.x.x.y is already in use” apply

I've just setup a couple of C-Class IPs on different servers and I noticed after adding the ifcfg-eth0-range0 script and restarting the network interface I always get messages like Determining if ip ...
0
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0answers
36 views

Proxmox Virtualized Client (Network Configuration)

first some information about me. I ordered a server from ovh and purchased one failover ip to test proxmox and do some training. The main Server is hosting proxmox(Example IP: 123.45.67.89 to figure ...
0
votes
1answer
18 views

Network request going from which IP address [duplicate]

I am trying to see the concept of tor and prvoxy import socks import socket def create_connection(address, timeout=None, source_address=None): sock = socks.socksocket() sock.connect(address) ...
0
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0answers
25 views

Graphite Network SNMP Counter

I am having issues using graphite and visualize my network interfaces collected data correctly. So the data is collected and I see the data being collected. It standard ifHCOutOctets and ifHCInOctets. ...