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

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Windows Server 2012 R2 SMB/CIFS performance for Mac OS X Clients

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
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3answers
281 views

Documenting networking infrastructure [on hold]

I'm looking for Open source web interface for documenting the active and passive parts of a networking infrastructure, cabling.
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1answer
17 views

windows route not followed

I add a route on the windows network like so: route -p add 46.137.226.16 mask 255.255.255.255 10.20.1.1 The goal is for traffic to 46.137.226.16 to be routed via the VPN/remote gateway on ...
3
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2answers
196 views

What does 'Si' mean with respect to network switches?

I am seeing references to Multilayer Switches with Si as in the network symbol below. What does the 'with Si' qualifier mean?
2
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2answers
27 views

openstack instances cannot access external network

I'm new to OpenStack. I'm using RDO packstack --allinone setup. All openstack nodes reside in one single machine, with only one physical ethernet interface (eth0, 192.168.0.11) I launched two ...
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4answers
171 views

Centos server keeps jumping to address instead of static assigned address

I have a headless Centos server that I've configured with a static IP address. I've disabled Network Manager, avahi-daemon etc. Whenever I restart the network it just jumps to 10.155.90.100 instead of ...
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1answer
30 views

zeroshell with multiwan on virtualbox

I'm planning to setup Zeroshell as a router gateway for a school network on Virtualbox. The host machine will run Ubuntu server edition. Then I will install Zeroshell as a guest Os with 4 configured ...
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0answers
26 views

unable to browse the internet even when i connected to internet in ubuntu 12.10 [on hold]

Recently i was updating my Ubuntu from 12.04 to 12.10. After the Update i was unable to browse the internet.But I'm able to be Online in Skype. I don't understand why this is happening or where the ...
2
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0answers
18 views

TCP connection through IPSec (Linux/Strongswan) stalls after exceeding PMTU

The backups (via Bacula) of one of my servers (“A”) connected via IPSec (Strongswan on Debian testing) to a storage daemon (“B”) don't finish 95% of the times they run. What apparently happens, is: ...
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1answer
9 views

How do I discover peers in an Ubuntu VM in an Azure Service?

I'm setting up a few Ubuntu 14.04 (LTS) virtual machines under an Azure Service (Availability Set). I'd like for each of these to be able to discover dynamically at least one other system in the local ...
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1answer
1k 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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1answer
20 views

VirtualMachine is not available from bridged interface outside the local network

I'm unable to connect to any service running in my VirtualMachine from Outside my local network. My VM has the following configuration: eth0 - Host Only Network eth1 - Bridged Network (Therefore ...
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1answer
2k views

Unable to ping between host machines and guest vms running on Vmware

In order to learn a bit about system administration, I've installed a Centos vm using Vmware on my local machine running Windows 7. Everything seems to be working fine since I can access the internet ...
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0answers
12 views

cisco routers IAD881F l2tp tunnel configuration

I have a problem with a couple of cisco routers IAD881F, I'm trying to extend my network between two points via L2TPv3, according to configuration my routers are connected and the tunnel state is UP, ...
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2answers
12 views

Can a cisco router execute a command itself?

I'm experiencing a problem with my Cisco router 1900 Series, the router sometimes stop routing packets, and when i log into it and show the running-config i see no ip routing executing ip routing ...
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2answers
643 views

Netsh Dump missing DNS settings

I'm trying to figure out why "netsh dump" produces different scripts on 2003 versus 2008. In output below, I've used "netsh interface ip dump" to keep the length of this post reasonable. I've searched ...
2
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4answers
671 views

Multiple Static IPs, NAT and Comcast

We have just signed up for comcast business with 5 static IPs and have an internal private network. We are a small business and I am hoping that we can purchase a router/firewall that will simply ...
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2answers
26 views

Login before using the internet

How do you setup a user login page in order to connect to the internet just like the one at McDonalds and Radisson Blu? What kind of setup is that? We are in school and would like to have that kind ...
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0answers
12 views

Can't clear que for printer on the network

I'm not sure if this is the right place to post this, so forgive me if I am out of line. I'm having some printer problems with our server. When I look at the printer connected to our network, I see ...
2
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2answers
91 views

One server, two DNS records in different networks… How to define which to use

I have a Hyper-V VM that has 2 virtual NICs, in different networks. These different networks travel over different physical infrastructure. Network A is used for management, and goes through a ...
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1answer
35 views

Windows server 2012 two external routes / 2 NICs

Our current server layout has 4 servers running on an external IP address all multi-homed using the 192.168.1.x network for external public access and the 192.168.5.x network for internal ...
2
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2answers
4k views

All connections from this network get stuck in SYN_RECV state, connections from my home or phone properly get ESTABLISHED

My server (a linode VPS) suddenly started to timeout on every request yesterday. I'm pretty inexperienced in networking and would love to learn a process for debugging these connectivity issues. ...
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3answers
1k 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 ...
2
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1answer
50 views

Poor network performance on Server 2008 machines

I have a network consisting of about 40 Windows 7 machines (physical) and 2 servers (Virtual, ESX) which are Server 2008 Std ed (one is a SBS 2008 but they're the same 'under the hood'). Network is a ...
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2answers
1k views

Windows Server 2008 occasional connection drops troubleshooting

I'm seeing occasional (2 or 3 times/day) "connection drops" on a Windows Server 2008 R2 physical server, running on a Dell R710. I use the term "connection drops" because I don't know how to describe ...
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0answers
17 views

LXC networking not giving outgoing connection

I have a LX container on Ubuntu 13.04 which has worked flawless for the last 161 days. I restarted the host and started all the LXC's and I'm allowed to connect to the LXC containers from the outside. ...
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2answers
74 views

512 IP in one NIC - ubuntu - is this possible? [on hold]

Let's say that I have 1 network card and 2 blocks /24 of IP to assign: 150.50.50.0/24 150.60.60.0/24 I know, that I can only add 256 virtual interfaces to each NIC from ...
6
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1answer
2k views

Limit incoming and outgoing bandwidth and latency in linux

I realise many similar questions have already been asked, but so far I've yet to find a solution to my problem. I have a virtual linux server (running Debian Squeeze) that I use for testing of ...
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1answer
17 views

Telnet to localhost 3306 looses connection to host after few seconds

When I try to telnet into my localhost port 3306 which belongs to mysql, it shows me the hello packet, then looses connection after a few seconds. My skip networking is set to OFF, I have started and ...
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0answers
17 views

vmware esxi host ha state in election

In my Vmware Esxi server 5.1 , 2 host machines which are added as cluster ,there HA state is turned to ELection .I tried Reconfiguring the vsphere for HA it is not working .In cluster it shows issue ...
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1answer
40 views

How should I properly block outgoing http traffic with iptables

I'm experimenting with iptables, and I'm trying to allow all outgoing requests for HTTPS, but to block HTTP. I have the code below; Chain INPUT (policy ACCEPT) target prot opt source ...
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1answer
30 views

IC socket on network cards?

I have been looking at network cards and I have noticed a few of them have this mysterious port on them that looks like an IC socket. I was wondering what this is used for and if it is of any ...
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3answers
751 views

ipconfig slow to complete

Does anyone have any idea why ipconfig on Windows XP might take a 10-20 seconds to finish? It’s causing a timeout issue for me in an application.
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29 views

Adding old T1s to a new configuration

As embarrassing as it is, my facility is running on two T1 lines. One connects us to AT&T and the other connects us directly to our corporate facility. This is a mirror of an old system we once ...
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2answers
37 views

Making use of free Pop3/Imap and smtp [on hold]

I would like to know if its possible, to configure Microsoft outlook for users at my place of work using a free imap/pop3 and smtp. for receiving and sending mails, and we still retain our company ...
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0answers
20 views

Internet Connection Sharing and Network Bridging on Windows Server

I have a question regarding a small(ish) office network. I was wondering can I use Internet Connection Sharing with Network Bridging on a Windows server? The scenario is this: I work in a small ...
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1answer
55 views

can anyone show me how can i fix error with my NAT config

Can anyone help me with my packet tracer problem? My network 2 buildings (each building has 3 vlans) on the same side and it has 2 sides, between is internet. I finish with DHCP and now I try to ...
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0answers
10 views

Dell Powerconnect 6200 management access via general mode ports?

I have a Dell PowerConnect 6248/6224P stack with several VLANs, and am trying to set up VLAN routing. I have one port dedicated to my management VLAN (99), but I would like to access it from another ...
0
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1answer
129 views

Installed gitlab-ci but only nginx welcome page shows

I installed gitlab-ci using this guide and everything has gone pretty well. I got to the end of the tutorial and when I go to the ip address of the server I only get a Welcome to nginx! screen. I'm ...
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1answer
921 views

VPN - local and remote networks IP collision

I have created a VPN connection in Windows using the New Network Connection wizard that comes with Windows. It works without problems in most places, but there is one concrete place where, despite ...
0
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1answer
1k views

VPN and overlapping subnets

I have a number of Cisco site-to-site VPNs between using ASA and Pix devices established for my clients. This is a hosted application and I need for the entire address range on the client's network to ...
-1
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0answers
15 views

Cant ping device from inside virtual network [on hold]

I want to create a virtual network that real devices can connect to using virtual box. I have 2 routers I am bridging to virtual firmware. I'm have servers also running on vm's and would like to be ...
0
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0answers
17 views

OpenVZ containers can not ping out

I have a server on OpenVZ. While I have gotten networking issues in the past, this I have not cracked yet. The server has the following symptoms. No container can ping out Containers can ping each ...
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1answer
3k 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 ...
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0answers
20 views

Some Url not working properly on my connection [on hold]

I found the below issue really frustrating and I'm opening this question because I think it could be a good occasion to learn something about networking. The issue I'm facing this strange issue on a ...
-8
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4answers
65 views

How does a host receive an IP if there's no DHCP server? [on hold]

If a new host connects to a LAN without a DHCP server, how does it receive an IP?
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0answers
16 views

Some similar routers to Ubiquiti EdgeRouter Lite [on hold]

i am looking for a similar router to Ubiquiti EdgeRouter Lite, i already got 3 wireless ones and now looking for a main router for them, what's your opinions on good one's? Thanks.
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2answers
1k views

Untangle VPN setup, how to see internal addresses?

So Untangle is setup as the default gateway at 192.168.100.1/24, it is the authorative DHCP server issuing addresses from 192.168.100.100 to 192.168.100.200 and is successfully connected to the ...
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1answer
46 views

Keeping your server safe [closed]

I have a typical vps server with some custom sites on it running on port 80, a mail server, I don't have a DNS server and it is a default ubuntu 12.04. I don't have any admin panel, I am doing all the ...
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0answers
25 views

OpenVPN in bridged mode, confusion about interfaces

I'm trying to understand some fundamental OpenVPN/networking basics. Let's assume the following scenario: there is an openVPN server which is already configured properly it runs in bridged mode the ...