Tagged Questions

Networking refers to the technologies and techniques that enable the interconnection of devices and applications allowing them to communicate electronically. Originally referring to local-area networks (LANs) designed to allow communication between computers in the same office or university, ...

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0
votes
2answers
51 views

Restart the PC remotely

I am connecting to my workspace 's PC (window xp) in my home using the company VPN. I can ping it successfully after connecting to the VPN .Is it possible to restart this PC remotely by using some ...
0
votes
1answer
10 views

Ethtool capabilties affected by ifcfg-ethX settings?

I just resolved an issue when bringing up an interface, but I'm at a loss to explain why it worked. So I'm looking for someone with more knowledge of the linux networking stack to explain this to me. ...
-2
votes
3answers
49 views

View other computers on a two router network

I'm currently facing a small problem regarding a new network setup. I have a few desktop PC's and Ethernet printers that all need to be connected via an Ethernet network. I have 2 routers in the ...
0
votes
1answer
27 views

What sort of network problems can a single NIC host cause?

A remote office has a Cisco ASA 5505 connecting the LAN to our HQ LAN via VPN. When a particular Windows XP PC is connected to the ASA via a switch, the VPN tunnel drops, and after a short while, all ...
3
votes
2answers
19 views

Tracking down “Connection reset” errors in Linux

I'm handling large numbers of concurrent downloads (approx. 500 per server) using Java. All the files are being downloaded from Amazon S3, and the downloading server is an EC2 m1.large instance. ...
1
vote
1answer
38 views

is clearing the ECN bits from the IP TOS header considered harmfull?

I am considering to clean these bits on the border of our network. Is this considered harmfull or evil? Some Backbround: We have ingress traffic from the Internet to some mobiloe Devices behind a ...
12
votes
2answers
348 views

Serving 10,000 simultaneous users over Wifi

I'm looking to offer a wifi service at a public event. The traffic will be very minimal, 10KBps should be adequate. Users don't necessarily need to connect to anything other than the private intranet. ...
0
votes
0answers
15 views

Hyper V internal network with internet access

I was wondering if this is possible. I would like to setup an internal virtual network, with internet access. I'm trying to create a lab environment for some testing. Nothing in the Lab Environment ...
1
vote
1answer
33 views

How to filter some protocols on all ports

Under CentOS, how can I filter traffic by protocol rather than by port? For example, I would like to filter ftp traffic regardless of the port being used in order to prevent users on the network from ...
1
vote
1answer
20 views

Ganglia network stats incorrect

I am using ubuntu 10.04LTS. The Ganglia on all of my nodes is not reporting the network usage correctly. There is a fairly large amount of fluctuation on the actual network, but on ganglia it seems ...
-2
votes
3answers
54 views

how to set up multiple IP addresses on my linux? [closed]

I'm doing some computer network homework and I'm supposed to develop some sort of Peer to Peer file sharing software, and when I wanna test it I need to run a few (5) instances on my linux/ubuntnu ...
0
votes
2answers
38 views

SSH intermittently losing connection or not even getting a connection on a local Ubuntu 10.04 server

Thanks in advance for any help. I'm using Ubuntu 10.04 server, OpenSSH is installed standard via package. I have this running on a dozen other machines in this exact format, and they are virtuals so ...
0
votes
1answer
9 views

Connecting to a server inside a DMZ

in this scenario [ net2 / 10.0.1.1 ] ---- [ net1 / 10.0.0.1 ] --- ( Internet ) | | < pc2 > < ...
0
votes
2answers
25 views

IP route ppp0 + eth0 access to outside network

I need some help in define a route I have two connections one from eth0 and other a ppp0 (a 3G card) Not having the ppp0 connection active my route table is: Destination Gateway Genmask ...
0
votes
1answer
40 views

Getting Macs to authenticate to AD and map home directory

I have a multi-platform environment with Macs and Windows. I have it now setup where users can log into their Macs authenticating with their user accounts in Active Directory. I used to have their ...
3
votes
1answer
29 views

“route add default -iface em1” in rc.conf on FreeBSD

I have two NICs on my FreeBSD server, which are set up like this in rc.conf: ifconfig_em0="10.0.0.1 netmask 255.255.255.0" # LAN NIC ifconfig_em1="DHCP" ...
1
vote
2answers
26 views

removing static route from linux doesn't disconnect session

I want to test "connection retry" with remote application server. For this, I am using route method, wherein I remove static route from my linux server and check if the connectivity goes down or not. ...
1
vote
1answer
39 views

routing internet traffic to a remote host, leaving the local traffic alone

Here's the topology: gw1 (linux): 10.20.1.1, 192.168.25.3 gw2 (linux): 192.168.25.1, 192.168.26.1 bridge: 10.10.15.2, 192.168.25.2 gw3 (linux): 10.10.10.1, 10.10.15.1 gw4 (ddwrt): 10.20.0.1, ...
1
vote
3answers
69 views

Two local networks, but Windows Web Server 2008 chooses wrong connection for accessing the internet

We have some servers running Windows Web Server 2008. They have two network cards. One with a private IP of the 172.X address space and one with the 10.X address space. The one with the 10.X address ...
0
votes
1answer
34 views

Networking hardware for OpenStack deployment

I am looking for some advice on networking equipment for an OpenStack deployment. I currently have a single ADSL connection coming into a building with a static IP and nothing connected to it ...
0
votes
1answer
10 views

Linux IPSec Tunnels does not forward IP Packet with ECN bit set to CE (Congestion Experienced)

I have a Linux IPSec Tunnel between a GGSN of a network operator and our data center. The IPSec works fine for all traffic but IP Packets coming from our side and are marked with ECN bit set to 0x3 ...
1
vote
2answers
76 views

MAC Address of device when turned off?

Is it possible to get a list of MAC addresses of devices connected to a network, even though the device is currently turned off? The device has power so I could do a wake-on-lan. I'm trying to get ...
1
vote
3answers
34 views

Unable to use FQDN when using local network (Ubuntu Server 10.04, dd-wrt)

Networking newb here... I seem to be having an odd networking issue. When I am using a PC/laptop/Smart phone on my local network I am unable to access web pages (or email) on my network server using ...
-3
votes
1answer
64 views

Is it possible to limit Samba (or entire LAN) speed?

I've a problem with a mini server (Via epia c3 1ghz): when there is too much LAN traffic (in particular Samba or NFS files moves) the server reboots and continue to reboot until I unplug the LAN cable ...
1
vote
1answer
23 views

2 NIC's are not loading by the Ubuntu Server

I have a Server with 5 NIC's. And I have just installed Ubuntu Server 11.10 64 bit fully dist-upgraded by now (31 Jan) 3 NIC's are identical PCI-Express x4 adapters. 1 is integrated TG3 and the last ...
0
votes
1answer
54 views

Cisco ASA - Enable communication between same security level

I have recently inherited a network with a Cisco ASA (running version 8.2). I am trying to configure it to allow communication between two interfaces configured with the same security level ...
0
votes
1answer
27 views

How to setup network interface to have eth0 as dhcp and eth0:1 as static ip?

Im trying to configure my network to have both a static IP and a DHCP IP the system in question is ubuntu server 11.10 with only additional software being the LAMP bundle (web server) and OpenSSH. I ...
3
votes
3answers
190 views

tracing switchport via wall RJ45 network jack

I just started new job in new networking environment, so the networking done before me is a little difficult to trace. I got a wall jack port which I have to trace down to which port its connected to ...
-1
votes
1answer
51 views

Best way to connect two separate networks with separate internet connections within the same building

So I'm a programming intern and since I'm the only one in the company who seems to have rudimentary knowledge of Linux I've been given the task of setting up a network so that employees may share ...
-1
votes
0answers
46 views

Summer Internships (for IT/Security/Networking?) [closed]

I know these are a common thing to do during the Summer semester for Computer Science students at large companies like Facebook, Apple, Google, etc. Are there similar internships available for IT ...
0
votes
1answer
40 views

How do I know if my site-to-site vpn connection is being saturated?

We've got a T1-internet connection with a Cisco ASA 5510 appliance in our small office. We have a site-to-site vpn connection from our office to a remote data center. Question(s): How can I find ...
2
votes
2answers
67 views

Connecting two servers over internet

So I have a dedicated server . Now I need to add another server, but they do not support LAN connections between their servers ( yeah, cheap I know ). So, I need a reliable way to tunnel the two ...
0
votes
3answers
85 views

Having an issue trying to get Gigabit speed across my network (Ubuntu Server)

I've just started looking into the network speeds at my office, the entire network is setup to be "Gigabit". This includes Gb switches, Gb Network cards and Cat 5e cabling. I'm not expecting the full ...
1
vote
0answers
49 views

how to ping & use specific network card [migrated]

i have 3 network cards , 1 Lan (wired) , 1 wireless network card & 1 is wireless usb how do i ping from specific network card ? & how do i use specific network card for specific ...
-1
votes
0answers
43 views

Why am I receiving “can't connect to” errors more often nowadays?

We are using Ubuntu 10.04 LTS as a gateway for my servers in AWS. I have around 20 EC2 instances, which connect to Internet through this gateway. Recently, some of the HTTP connections through this ...
0
votes
1answer
4 views

Excluding folders from a roaming profile, client-side

I am using a laptop connected to our company's domain network, and after logging in this morning it told me that I have exceeded my roaming profile space. After looking into the issue I realized that ...
0
votes
2answers
35 views

Howto switch ISP provider? [closed]

Possible Duplicate: Office network failover? I have a office LAN providing internet access to several workstations, each workstation it is basically connected to the hub that it is ...
0
votes
1answer
37 views

Office network failover? [closed]

Possible Duplicate: What hardware do I need to add a backup internet connection? I have a office LAN providing internet access to several workstations. Each workstation is basically ...
2
votes
0answers
35 views

altnet parameter into pimd.conf file

I need to route a multicast streams in my private network. I'm using pimd for multicast routing. The multicast routing did not work until I put altnet <multicast_source_ip> masklen 24 to the ...
0
votes
0answers
15 views

Why my “mini” server network card freeze when transfering files? [migrated]

i have a huge problem regarding my home mini server. The mini server configuration is: Via Epia C3 1ghz with 1 gb Ram 1 internal hard disk 70gb and 1 external usb hard disk 500gb Operating system: ...
0
votes
2answers
55 views

Sharing printer with laptop in Windows

There is a computer with Windows XP machine and a printer is connected to it. The computer is connected to a router (I don't know if wireless or with cable). I'd like to share a printer with laptop ...
0
votes
1answer
63 views

Multiple virtual VLAN interfaces on single NIC (Debian)

I'm trying to setup multiple virtual interfaces with VLAN's on a single NIC. I'm running Debian Squeeze. Currently this is my /etc/netowrk/interfaces auto eth0.10 iface eth0.10 inet dhcp This ...
1
vote
0answers
20 views

Using a dedicated computer as proxy to home broadband router [migrated]

I'm thinking of creating a proper home network and using a single machine dedicated to access control, centralised authentication, DHCP and acting as a proxy for internet access via a separate home ...
2
votes
1answer
88 views

How can I increase link speed between two webservers?

There is server A in which there is no physical access, in a datacenter around 500Km away. This server is not ours but we are using one of its webservices. And there is the company's server in our ...
-1
votes
2answers
77 views

Weird Mac Address at Windows 2003 DHCP Server

I am trying to configure a reservation for my Galaxy. The problem is that my DHCP is giving out an IP address to an obviously invalid MAC address (Galaxy Mac Address) - Please note attached ...
0
votes
1answer
24 views

TL-WR1043 stop working [closed]

I have TL-WR1043ND with one of the latest firmware version (3.13.5 Build 111122 Rel.55501n) and I need to reboot the device too often, because it is stop to work (no ssid broadcasting no internee ...
0
votes
1answer
69 views

Cisco IOS subnet mask using bit notation

I was wondering if it was possible to use bit notatiton when configuring interfaces, or just in general, within the CISCO IOS. I have friends and others swear that they've been able to before, but not ...
0
votes
0answers
30 views

How Can I Connect Two Sets of Computers Within My Home Office So There's No Cables On the Floor? [migrated]

I have a group of five computers at one end of my home office and another group of four computers across the same room. All are hardwired on the same internal network. These cannot be consolidate or ...
2
votes
4answers
79 views

WAP Monitoring Suggestions?

We have a wireless access point at a client site. They say it goes down a lot. We replaced it. They say it still goes down a lot. Nobody's happy. Now, in some instances, "WAP down" turned out to be a ...
0
votes
2answers
39 views

Workstation On Domain Cannot Connect To Internet

Here is my initial setup. I have a router, a switch is connect to that router, on that switch is a Physical Server, on that server is a virtual machine (WIN2K8R2 192.168.1.21) and also on that switch ...

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