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)

-1
votes
0answers
11 views

Connected to Internet but can't load certain page

For some reason I can't connect to a certain site...I've checked whether it's up or not by searching for the "is a website down" test and the result said the site I wanted to go to was UP. I can ...
0
votes
0answers
16 views

Network Config: Difference between Windows and Debian

We have a so called "LAB"-Network(VLAN). The Switch and Firewall are configured to allow access from the ip 10.150.151.1(Windows Client in LAB) and 10.150.151.10(Debian Client in LAB) to a mail ...
6
votes
3answers
3k views

Windows Server 2012 R2 performance for Mac OS X Clients (File Services)

I am inheriting a Windows 2012 R2 Server that is experiencing abysmal SMB/CIFS performance for Mac OS X Clients in particular. The server is doing file services and is an Active Directory Domain ...
1
vote
1answer
27 views

Select source IP on windows server 2012 with multiple IPs on 1 NIC

I have searched a lot for a solution to this case but I couldn't find any. So, any help would be appreciated. I have a windows server 2012 with 1 NIC having 2 IPs bound to it 37.188.120.8 and ...
9
votes
1answer
111 views

Should I use link-local addresses where a non-routable, internal IP address is required?

I have a network appliance which contains some load balancing features - in my design, these features are only for use internally within the appliance. Nothing should EVER speak to them externally ...
2
votes
1answer
74 views
+50

Network WAN load-balancing over Multiple Firewalls

Currently we have a Cisco ISA570 Firewall which does failover load-balancing between two ISP links. I would like to get a Sonicwall NSA6000 which should be primary and the ISA570 as a failover ...
1
vote
0answers
13 views

Setting up a new DMZ for Web Servers

When it comes to security, VLAN ACL's, firewall DMZ policy and the like I am a Newb. So any help will be appreciated. We are trying to architect our network to place all of our web accessible ...
1
vote
2answers
25 views

Setting up a network for a Host Server and it's Guest OS

Is there a standard as to how one sets up networking on a Server Host that will have virtual servers within? In the past I've used virtualmin and set up the nic to have multiple alias such as eth0:1 ...
3
votes
4answers
11k views

Linux - martian source in /var/log/messages

I keep getting these messages in /var/log/messages : Mar 8 23:17:25 saas1 kernel: martian source 169.254.1.1 from 169.254.95.118, on dev usb0 Mar 8 23:17:25 saas1 kernel: ll header: ...
3
votes
1answer
49 views

Procurve script/automation

This may be a stupid question, but I'm normally not a network admin, but circumstances have me there. I'm trying to disable down ports on a switch, but have a boatload of them, I'd like to configure ...
2
votes
1answer
3k views

Watchguard config, drop-in or mixed-routing mode?

I have a Watchguard XTM 2 that is currently acting as a firewall and a router for my business network, I currently have the WG setup in mixed-routing mode and am happy with the current configuration. ...
-5
votes
1answer
21 views

Is it possible to change wireless router BSSID? [on hold]

I suspect someone is trying to hack our wireless network. I've stopped broadcasting the SSID, but assuming they've already attempted to gain access in the past they could have the BSSID stored, which ...
-1
votes
0answers
8 views

Can I manually define a Wireless Portable Devices firewall predefined rule?

I want to connect my portable device to my Windows Server 2008 R2 via Wi-Fi. After enabling ports and services, I am still unable to connect, most likely because I am unable to modify the predefined ...
0
votes
0answers
27 views

Removing The Server [on hold]

Good morning every one, im looking for a little advice if possible please. Im not new to IT but I haven't really dealt with anything too in depth on the server before. We have a server running ...
-3
votes
0answers
20 views

Which flags should I use for my “netstat” commands? [migrated]

I would like to use two variants of the netstat command, one for exclusively IPv4 and the other for exclusively IPv6 traffic. For both commands I would only like to list the following information. ...
0
votes
1answer
16 views

Networking Cat5 Jack [on hold]

Can a cat5 wall jack transmit data both ways or is the connection only an output from the jack. I have a router hooked in to a cat5 wall jack that runs to a switch the switch is connected to two ...
3
votes
3answers
31 views

Can't consistently ping both networks of multihomed host

I have a host which is multihomed, eth0 is on 172.31.254.0/24 and eth0.10 is on 172.31.253.0/24 . Obviously eth0.10 is a subinterface on vlan id 10. From this host I can succesfully ping hosts on ...
-2
votes
0answers
12 views

how to bridge two network interfaces to access guest ubuntu server [on hold]

I am running ubuntu as guest inside virtualbox on osx host. There are 2 network cards configured: That allows me to work localy through a fixed IP and in the same time access internet on the ...
-3
votes
1answer
28 views

Cater to multiple countries? [on hold]

I run a game server off a linux machine with a single IP address masked by a proxy. The box is located in an LA datacenter, and for players in some other countries, they experience a high ping ...
1
vote
0answers
35 views

HP ProCurve 4208vl - Show PSU information?

I'm working with a few older HP ProCurve 4200-series chassis switches (4204vl and 4208vl). Some of these units have single power supplies, while others have dual power supplies. I'm trying to ...
1
vote
0answers
15 views

A local IP address (RFC 1918) on my network that is not … local .. [duplicate]

I've noticed an IP address today on my network (192.168.15.1) which when visited actually goes to a page that has a router webconfig page (Not my router) The puzzling thing is that i tried traceroute ...
2
votes
1answer
21 views

Virtual interfaces with different MAC addresses

I try to figure out how to set up two logical network interfaces (at one physical interface) with separate MAC addresses on a Linux machine. My first attempt was to use macvlan which seemed to work ...
0
votes
2answers
1k views

Routing between multiple Mikrotik Firewalls

I have 2 Miktorik RouterBoards, an RB1100 and a RB951G. The 951G is acting as my Wireless box, and has Guest, Internal and Internet Only Wireless networks. The RB1100 has 3 WAN connections (2x150/10Mb ...
6
votes
4answers
3k views

How do I check how many connections are open currently on a specific TCP port?

I'm doing some comet benchmarks and would like to see how many open connections I have. Actually I use netstat: netstat -ant | grep 8080 | grep EST | wc -l But it needs around 4-6 minutes to list ...
4
votes
1answer
2k views

Unable to make work both private and public ip network on openvz container in Proxmox

I'm using Proxmox 3, it is a fresh installation. For those who know, I'm using OVH Vrack 1.5 (along with a previous Vrack 1.0). My server has two interface eth0 and eth1, I succeeded to configure ...
1
vote
0answers
15 views

how to overcome conflict between 2 network cards - virtualbox ubuntu [migrated]

I am running ubuntu 10.4.04 LTS as guest in virtualbox on OSX Yosemite. Unfortunatelly I seem to have the network configured wrong I followed this tutorials ...
10
votes
11answers
57k views

Network Printers Offline (but not really)

I have two Ricoh printers/copiers setup for IP printing in the office. Before this week there were no problems printing to them. Now a handful of them (All running Vista, not sure if it is every Vista ...
3
votes
1answer
5k views

Unable to see Samba server by netbios name

We have a linux server set up with a number of samba shares on our mixed windows/mac/linux network. The shares are accessible if we go to \\192.168.x.x\share, however we can't access the server by ...
4
votes
0answers
69 views

Why would you internally use NAT? [on hold]

I work at a fairly huge company as a software engineer and I would like to understand why an enterprise would internally use NAT. We have several data centers, somewhat geographically close to each ...
2
votes
1answer
54 views

A local IP address (RFC 1918) on my network that is not … local

I've noticed an IP address today on my network (192.168.15.1) which when visited actually goes to a page that has a router webconfig page (Not my router) The puzzling thing is that i tried traceroute ...
-4
votes
0answers
29 views

Identify The Source of Networking Spikes [on hold]

I have been getting some crazy network spikes ranging from 300 - 1200Mbps. The machine hosts a WAMP server, which serves some low traffic websites. These spikes will effectively kill my network - for ...
0
votes
2answers
2k views

TCP port numbers reused and TCP Retransmission

Facing issues due to TCP Port Reuse and Retransmission for HTTP traffic. My deployment is as follows: enter image description here I have a squid proxy installed on a unix machine which is sending ...
19
votes
3answers
32k views

How to reload default Mac OSX routing table without rebooting

Greetings, I'm using vpnc for a VPN client. I'm also doing some tricky things with route to make sure I can still access my local network, etc. etc. (the particulars here are not very important). ...
-4
votes
0answers
17 views

Internet Usage Monitoring [on hold]

I have a WiFi enabled ADSL Modem/Router (ASUS DSL-N10) connected to some devices (PC, Mobile, ...). It's connected to internet via Cable or WiFi through this Modem. I need to monitor traffic used by ...
3
votes
2answers
854 views

Winbind/AD: Local users with identical AD usernames

We are getting ready to add Winbind/Samba to some CentOS servers. Identity Management for UNIX is running on our DC, and it's testing well so far. There is one scenario I'm having trouble with, and ...
-1
votes
1answer
11 views

Addresses overlapping

I was putting somes static addresses to my interfaces then it shows me this: 172.16.1.0 overlaps with FastEthernet 0/0 What does it mean when two addresses overlaps and how can we avoid it? EDIT: ...
1
vote
1answer
34 views

Hyper-V virtual machine upload speed unbelievably slow

I have the weirdest problem I was hoping you could help me with. I've got a dedicated Server 2012R2 server with an Intel 82580 network adapter. It runs a couple of VMs in Hyper-V that are attached to ...
1
vote
2answers
16 views

Invoke-WebRequest timeout if NIC 1 disconnected

I have a windows pc with three network interfaces. One is a UMTS modem and the two others are lokal networks and one network has connection to the internet. Invoke-WebRequest ...
8
votes
2answers
942 views

Network Cable is NOT unplugged Windows ARGH

Okay this is driving me NUTS. The server will sit with a Network Status of "Unplugged" for ages until it is rebooted. This seems to occur at random times (2am, 10pm, 8:30am, 3pm etc) it does once ...
1
vote
3answers
2k views

Ubuntu Server 10.04 Heavy Network Traffic causes disconnect

I'm currently running a headless Ubuntu 10.04 server. Installed is the LAMP stack, Joomla, Virtualbox, phpvirtualbox, webmin and proFTP.. It resolves the IP address so I can access it remotely (either ...
95
votes
4answers
15k views

Should I quit using Ifconfig?

With the servers that mount Infiniband cards, when I use the ifconfig command, I get this warning: Ifconfig uses the ioctl access method to get the full address information, which limits hardware ...
0
votes
2answers
44 views

Http Requests: how to identify a machine using multiple IP addresses

I have an http server. Is it possible to identify a machine, which is making http requests to my http server using different IP addresses? In other words, is it possible to identify a machine, by ...
2
votes
0answers
16 views

How do I enforce preferential routes with BGP & Quagga?

I have two routers that I'm setting up currently and they will be feeding my network of servers with a private AS number provided by the datacentre. What I want to do is provide both a VRRP failover ...
0
votes
0answers
23 views

MySql JDBC - java.net.ConnectException: Connection refused, can't see why [duplicate]

I have a test environment with MySQL 5.6 server running on a Windows machine and a Linux machine running a webserver. When I start the webserver it tries to connect to MySQL via: ...
0
votes
0answers
4 views

Implement QoS on home network (maybe using a Synology NAS) [migrated]

My home router (Technicolor TG784n v3, firmware version 8.G.M.1) has no Quality of Service (QoS) settings. Still, I would like to implement QoS, mainly to be able to control bandwidth occupancy by ...
0
votes
1answer
31 views

How to limit outgoing traffic per IP Address using Linux TC

I want to limit outgoing traffic per IP address. For example I have a network interface eth0, having 1Gbps of bandwidth. I want to limit the whole network interface to 1Mbps each destination IP ...
3
votes
2answers
4k views

Windows 8.1 Wireless Authentication WPA2-Enterprise

For the network at my University I have to set wireless authentication to WPA2-Enterprise using TKIP encryption. Since Windows 8.1 doesn't seem to have the usual wireless settings, I tried doing it ...
0
votes
0answers
18 views

Linux - iptables - get youtube streaming bytes usage [on hold]

How do i get bytes usage using iptables for particular IP for all data usage including youtube streaming videos Currently i am using following IP tables rule to get data usage by particular IP ...
2
votes
1answer
49 views

VMware Vsphere Monitoring and Alerting Network Outage

I am trying to set up an alert to email out when any of our VMs lose network connectivity. I'm trying the following settings but I do not get any alerts when I kill the network connection. Alarm ...
3
votes
3answers
1k views

Is there a way to pass VLAN tagged frames through managed switch?

I currently have a managed switch (DGS-3120-24SC) configured for private VLANs (secondary and primary port groups). Secondary ports are isolated from each other and forwarding is not possible between ...