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

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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 ...
0
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4answers
59 views

How do I simulate an unreachable host on windows?

I have a windows 8 PC, I am testing a beta program for network socket error handling. One of the ones I am having problem simulating for it to test is host unreachable and network unreachable errors. ...
3
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4answers
690 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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9answers
5k views

How to disable responses to PING

I feel like this should be a really simple thing to do, but googling and checking SF I didn't see anything. I'm trying to make my Fedora server not respond to pings, how do I do that?
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6answers
7k views

How can I figure out if port 25 is blocked on my network?

telnet mydomain.tld 25 tells me "connection refused" that's the extent of my network hax0r skillz. how can i tell if it's my network i'm on or the server itself?
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0answers
16 views

Investigating connectivity issue

I'm trying to set a up a new service on a server that is running apache, however it seems like incoming traffic on that specific port is blocked, although I do not understand why. On the first server, ...
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3answers
61 views

how to monitor network traffic in small office

We have a small office with around 30 systems . We have an internet connection connected to a router , The router is connected to a gigabit switch . All the computers are connected to that switch. ...
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0answers
17 views

Wake On LAN not working for Asrock motherboard [on hold]

Recently I installed and configured a new server for home use. Today I wanted to get the Wake On LAN feature working. For this I undertook the following steps: 1) I enabled WOL in the motherboards ...
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0answers
18 views

Whether mac learning will happen in Cut through switching mode? [on hold]

In cut through Switching mode , switch only look for first 8 bytes , then it will forward to destination. if this is correct, how switch will learn source mac address? Adding additional data ... By ...
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0answers
11 views

FreeBSD Inconsistent Ping

I have installed the FreeBSD in a local machine. When I try ping from another Windows PC(Say A) connected in same local network I am getting different output each time. 1st Ping Pinging 192.168.1.35 ...
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5answers
14k views

Network Error: no buffer space available

After some time of running fine, one of our Windows XP SP3 machines does not open some(!) new TCP/IP connections anymore. Putty says Network Error: no buffer space available, IE won't open any new ...
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0answers
11 views

what the best approach to get the network values on Linux machines [duplicate]

what the major difference between ip addr command to ifconfig -a command? both command are give the same values network IP's ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc ...
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0answers
38 views

[solved]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
6 views

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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0answers
15 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
37 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
19 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
35 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: [] ...
7
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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 ...
2
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2answers
35 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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0answers
33 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
10 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 ...
14
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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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0answers
27 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
21 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 ...
0
votes
1answer
30 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 ...
2
votes
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 ...
1
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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 ...
2
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1answer
40 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
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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
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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
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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0answers
26 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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0answers
19 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 ...
0
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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 ...
1
vote
1answer
979 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) ...
0
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1answer
904 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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0answers
16 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 ...
0
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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 ...
0
votes
1answer
20 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 ...
0
votes
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 ...
0
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0answers
11 views

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 ...
-1
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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 ...
-1
votes
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 ...