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 can I use host only networking from Vagrant with a static IP?

I have a device on my host operating system with the following configuration: vboxnet2: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 ether 0a:00:27:00:00:02 inet ...
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10 views

Detect if a occasionally slow request is caused by network

I developed an SPA web app. It works super fast but for one specific customer it is sometimes very slow without apparent reason. The customer was showing me his screen over skype and I ask him to open ...
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1answer
18 views

Figuring out who changed the privilege?

Sorry if this is one of those really simple questions, but I am trying to figure out if there is any way I can see what user changed another users privileges. I have a server running windows server ...
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0answers
16 views

openVPN file transfer speed

Problem: File downloads to remote office, pulling data from server are stuck at 128KB/sec (as reported by windows explorer), which is roughly 1mbps. Question: Why can't I get close to remote office ...
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1answer
22 views

Windows Server 2012 unable to access specific SSL page

This problem really boggles the mind. I have a standard Windows 2012 server with windows firewall enabled. Using Chrome, I am unable to access a certain HTTPS website while other HTTPS websites can ...
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2answers
3k views

Unable to connect via NetBIOS Name

I can't connect to machines/shares by NetBIOS names. Below is console output showing the problem. C:\>nbtstat -n Local Area Connection: Node IpAddress: [192.168.1.100] Scope Id: [] ...
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2answers
19k views

Exact meaning of RX 'errors' and 'frame' in ifconfig output?

I'm seeing network problems with a (RHEL) node (packets dropped), which also seem to manifest themselves by a non-zero count of the 'error' and 'frame' fields in ifconfig output: eth2 Link ...
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2answers
33 views

Sniff outgoing traffic on my server on a SSL channel

Im executing a CURL command on a php application running on my nginx server (centOS). The end point is a https address so the outgoing traffic is of course encrypted. I want to see the network ...
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32 views

How do I recover permissions after changing the LAN addresses of a network?

Server 2012 R2, SharePoint 2013, TFS 2013 update 4 I recently changed some hardware and the LAN addressing of my network. I went from 192.168.2.x to 192.168.3.x. After I did that, access to ...
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0answers
8 views

logger not logging to remote rsyslogd instance

I am running CentOS 7.0.1406 with rsyslogd 7.4.7 and logger from util-linux 2.23.2. I have two machines connected via a switch. When I try to use logger to log from one machine to the other, nothing ...
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3answers
43k views

How to setup a MySql server to accept remote connections?

I am installing a MySql server in Ubuntu desktop. I could connect MySql Query Browser to it when specifying the Server Hostname as localhost, but when I replace it by the machine's IP it stops working ...
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25 views

Datastores Occasionally Disappear on vSphere Client

I'm currently running several virtual servers and connecting to the vCenter using the vSphere Windows client. We're connecting with to a datastore on another server which has a separate folder for ...
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0answers
19 views

Setting up a caching system r/w in DCs across continents

We are going to implement a caching system to make our front-end servers which are located in different data centres in Asia, America and Europe can read and write some small JSON data in the shortest ...
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1answer
22 views

Freeradius auth error message

How can I set up a message sent to the user when enters a bad credentials to WPA2-Enterprise network? I am now using Freeradius and when I enter bad password, it says nothing, but Windows throws "You ...
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1answer
29 views

Choosing port numbers in the range 10000-19999

We have a Spring Boot application, which we control, running on given development and production machines. We use "standard" port numbers such as 8080 (Tomcat), 8686 (JMX) and the like. We don't ...
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2answers
12 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 ...
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5answers
3k views

How to configure traffic from a specific IP hardcoded to an IP to forward to another IP:PORT using iptables?

Unfortunately we have a client who has hardcoded a device to point at a specific IP and port. We'd like to redirect traffic from their IP to our load balancer which will send the HTTP POSTs to a pool ...
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2answers
1k views

How To Limit Svn Access to VPN Users

We have a collection of subversion repositories on our server and want to get a VPN up and running so we can access them off site. However, my boss insists that a select few repositories are not ...
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3answers
645 views

When the internet is down, so does Active Directory?

I am setting up business servers for a small office use with 5 users / 5 devices or so. Nothing elaborate here. I've set up a SINGLE Lenovo TS440 server (single NIC) with Windows Server 2012 R2 ...
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1answer
38 views

Broadcast ARP query to all nodes?

I am trying to broadcast an ARP query. I want to get every node's ip and mac address updated in my system via this query. So that I can type $arp and see all the nodes on my network and their ...
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0answers
13 views

does WifiDog provocates splash popup? [on hold]

I plan to use WifiDog for a captive portal proj. But I wonder if there is well a splash/popup when connecting the Wifi as a client. Does WifiDog ensure this OS-reaction ? Thanks
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0answers
16 views

iptables, redirecting all ingoing connexion

I have this iptables conf on my linux mint... What does it mean ? Chain INPUT (policy ACCEPT) target prot opt source destination ACCEPT all -- 13.37.42.0/24 ...
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0answers
33 views

I can't ping the gateway in debian [on hold]

Someone Please help. My system is Debian wheezy. the computer also contains Win8.1 and its network is fine. $ping 10.214.52.1 PING 10.214.52.1 (10.214.52.1) 56(84) bytes of data. From 10.214.52.112 ...
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0answers
36 views

Large scale network routing [on hold]

So i'm having a chat with my development team colleagues and we realise that we actually don't know how large scale networking actually works and this question came up ... Lets say i'm the guy at ...
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24 views

Why would Windows 7 not complete this TCP handshake?

One of our customers is running Windows 7, and cannot reach some of our servers because it seems Windows 7 cannot complete a TCP handshake. Here's a packet trace to one our servers -- note that a SYN ...
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18 views

iptables : redirect all ingoing traffic to www [on hold]

I have a Wifi hotspot, made with a linux machine. I d like to redirect any ingoing trafic to my index.php localsite. My public interface is wan0. Is iptables the best solution ? How can I do that ?
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1answer
2k views

Error while bringing up eth1

I'm getting this error while bringing up my network card: (process:2550): WARNING **: _nm_object_get_property: Error getting 'State' for /org/freedesktop/NetworkManager/ActiveConnection/3: (19) ...
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2answers
1k views

How to share Internet connection with Ubuntu Virtual Machine?

I have Windows Server 2008 R2 as host and Installed Ubuntu 11.04 as Virtual Machine using Virtual Box. My proxy is configured using URL. I tried configuring in the networking settings and also with ...
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1answer
6k views

Lost connection to MySQL server at 'reading initial communication packet', system error: 0 with windows

I found similar questions but none of them helped me with a windows machine. I originally posted this on stack overflow but it was suggested that I ask here. I was able to connect to mySQL through my ...
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2answers
1k views

Access print server through firewall?

At my workplace, we have two fiber networks setup, one for the business network and the other for process control (industrial manufacturing). On the business network, there is a standard print server ...
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1answer
977 views

Multiple Homed Windows 2008 Server / Windows 7 Client

I have a small Windows 2008 network, with some Windows 7 clients. The clients are both laptops with docking stations and I would like them to communicate with the Windows 2008 server (for filesharing) ...
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1answer
903 views

Outgoing IP Packet Capture and Logging with iptables

My goal is to use ipset lists in iptables to log outbound traffic to certain IP addresses. I intend to monitor an entire network passively. I have port mirroring enabled and the port mirrored ...
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15 views

TC fails to shape traffic with DRR

I try to control outgoing traffic from my server. I want to have several classes with different QoS parameters. For the scheduling I'm using DRR. The following commands (should) create a Tree of ...
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0answers
20 views

Why isn't the IP address of router showing in ifconfig? [on hold]

I am looking for the address that I type into my browser to get to the router configuration file. It ended up being 192.168.1.1, as usual. But when I enter ifconfig into the command line, this IP ...
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1answer
19 views

Does switching routers when using same IP cause temp downtime?

Still learning networking but from my understanding MAC Addresses are what route network traffic so if I switch out a router but configure them with the same IP does it take time for the new MAC ...
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1answer
66 views

vyatta virtual router interface aliasing does not work

I am trying to create an alias on vyatta virtual router. But I do not seem to get it to work. In vyatta we have to just add another address to the interface to add an alias. But the interface is not ...
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Upgrading TWC modem/router with 192.168.0.1 default address on home network with existing Trendnet wired router set to 192.168.2.1 [on hold]

I have a home network with a Trendnet TW100-S4W1CA wired router with a base address of 192.168.2.1, DHCP turned on with a range of 192.168.2.1 - 192.168.2.100, subnet 255.255.255.0. It is connected to ...
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0answers
15 views

Scheduled execution of files over network [on hold]

forgive my ignorance as I'm a Mac user and have been out of the Windows world for a long time. I am looking for direction on how I might be able to achieve the following: Have a windows computer ...
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0answers
15 views

Setting up Bridge

I'll be setting up a bridge network for kvm in CentOS 7. The thing is the server will be relocated to a new office in a few weeks, but I need to get it up and running now. I don't know if our ...
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1answer
33 views

Windows 7 pro- Normal boot up, but slow network login

got a question I'd like a little advice on. I have a user on out network who's got a laptop that boots up at a normal speed to the login page, but once he enters in his login credentials the system ...
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1answer
1k views

pfSense in VMWare Cannot Access Web Control

I'm running VMWare ESXi Free on a rented box. I have 2 physical NICs, 1 connected to the Internet, one connected to the Private Network in our DC. Each NIC is connected to a vSwitch and each vSwitch ...
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0answers
10 views

DSL modem in bridge mode but router not accessible from the internet

I have a DLink ADSL modem which I have put into bridge mode and connected to a Fortigate 200A firewall. The Fortigate is able to connect through PPPoE and receives the static public IP. I can browse ...
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1answer
65 views

Limit/Throttle per user OpenVPN bandwidth using TC

I have a group of users connecting to my server via OpenVPN TCP and UDP (2 services). The two services are operating on tun0 and tun1 I'd like to be able to limit each user's bandwidth to say 5mb/s ...
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2answers
1k views

Redirect some specific traffic to a different gateway

I have two gateways with different ISP, one of them defined as default for the LAN user and the other ISP used as the default for the Servers and VPN traffic. This is done using regular routing tables ...
2
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1answer
2k views

How to force certain traffic through GRE tunnel?

Here's what I do. Server (public internet is 222.x.x.x): echo 'net.ipv4.ip_forward=1' >> /etc/sysctl.conf sysctl -p iptunnel add gre1 mode gre local 222.x.x.x remote 115.x.x.x ttl 255 ...
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2answers
1k views

Smoothwall Express interface issues

I have a SmoothWall Express box that is currently configured with a Green and Purple interface. Both interfaces are in the same /24 subnet (which seems odd to me). The green interface (address of ...
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1answer
26 views

NAT TCP/UDP Connections With iptables on AWS

So I've got 2 instances on AWS set up so I can SSH into them directly (A, B) from my home machine C. But I want to set up box A so that I can forward certain UDP and TCP connections from it to box B. ...
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1answer
2k views

Adding static IPs on a p1p1 interface in ubuntu 14.04

I'm wondering if anyone can give me a rundown for networking configurations in ubuntu when the interfaces are p1p1 etc. I have tried p1p1:0 (like eth0:0) for secondary IPs to no avail. If someone ...
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44 views

How to find IP address of ADSL modem? [migrated]

Our fall back Internet connection uses a SpeedStream 4100 modem, which just broke, so I have replaced it with a new one. I need to configure it to bridge mode, but I can't even find its IP address. ...
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0answers
18 views

How to foward 2 users requesting 2 different URLS(ports) to docker containers managed by apache in docker (beginner) [on hold]

So. Lets first kick it off by me saying im not a networker (but learning to be one), but i have a problem related to it. If you have any answers, would you please provide it in laymans terms (Terms ...