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, ...
0
votes
0answers
5 views
Disable a network interface on windows but keep the “plug and play”
I'm looking for a good workaround to do this on Windows 7 and Windows XP:
Disable the network interface (ETH, WIFI, any NIC).
If the user connect his ETH cable, the network interface enable again.
...
0
votes
1answer
30 views
Port appears open locally but closed from another machine
I am currently trying to set up a Hadoop distributed compute cluster on my network. Currently. my cluster nodes are encountering a problem communicating with my master server.
Right now I am working ...
0
votes
2answers
31 views
Cisco reusing port-channel numbers
I know it probably does not make sense, but can you reuse port-channel number on a LAN?
Examples
Switch 1 -----po1----- Switch 2 -----po2----- Switch 3 -----po1----- Switch 4
I would not do this, ...
0
votes
1answer
19 views
How to troubleshoot banned connections on OS X / Ubuntu
I have an ubuntu 11.10 VM running on an OSX machine.
Every once in a while some services become inaccessible from specific IPs (e.g. sometimes just ssh is blocked, and sometimes both ssh and https.)
...
0
votes
1answer
24 views
NGINX on OSX Snow Leopard Server - extremely slow over network
I set up nginx to serve a rails application for our intranet. It runs on a osx server blade with snow leopard.
When I work on the server and go to localhost:8444 it runs very smooth and fast, but when ...
0
votes
1answer
31 views
Are both IP address and default gateway needed on a switch to enable communication between different vlans?
I know that a router is necessary for VLANs to communicate with each othe, but I would like to know if both IP address and default gateway need to be configured on the switch in order for different ...
-1
votes
0answers
28 views
Porting vyatta to power pc platform? [closed]
How difficult would it be to port vyatta to a ppc platform,t.What prior knowledge would it require?
1
vote
1answer
15 views
Cyberoam becomes unresponsive
Our client has a Cyberoam CR 50ia device that drops off the LAN at random times. The device's web interface cannot be reached, it loses internet connectivity, and it cannot be pinged over the LAN.
We ...
3
votes
0answers
22 views
Different versions of iperf for windows give totally different results
Measuring TCP output from a Windows client to Solaris server:
WXP SP3 with iperf 1.7.0 --> returns an average around 90Mbit
Same client, same server but iperf 2.0.5 for windows --> returns an average ...
0
votes
2answers
44 views
What is the best and simplest option to setup a Linux VIP
I just wondered if anyone could suggest some software and maybe provide example of how to setup a VIP between two servers?
Basically the problem is i want to setup two access servers with a VIP so ...
-4
votes
2answers
26 views
Unable to connect to Apache website hosted on VPS
I have set up a basic LAMP stack on a self managed VPS and now I would like to to preview the site by the IP assigned by our provider - before switching DNS over. Chrome reports the following error ...
2
votes
0answers
30 views
RDP ts port redirection
I have 2 pairs of serial devices (a scale and a POS pin pad) hooked up to 2 pcs (4 serial devices in total) with windows xp embedded sp3 (x86) running RDC/rdp 6.0. I am using those machines to RDP ...
1
vote
1answer
17 views
xampp and network
I have build a site working on my localhost using xampp on windows7.
Now, I my colleagues want to access and use that site in our small office.
I tried to access the site using IP address of my own ...
4
votes
2answers
147 views
Is this one network or two networks?
I have this simple question and really don't know the answer. Does the drawing below show one network or two networks? This is a question about the definition of a network from the OSI / TCP/IP model ...
0
votes
0answers
23 views
NAT on MAC-filtered network [migrated]
My ISP (Hyperion S.A.) provides internet using a UTP cable with MAC filtering. I'm trying to set up a router so that I can connect multiple computers to the network. Most computers would connect ...
1
vote
0answers
41 views
Setting up a VM to use a different IP range than vSphere/ESXI host
I currently have a server that is running vSphere 5 (ESXi). My management interface (VMKernel) has an address of 173.198.215.78 and the gateway on that one is 173.198.215.78. It appears to be set up ...
-3
votes
1answer
43 views
The two devices which facilitate storage over a network [closed]
I have been ask for specifically 'THE TWO' devices which facilitate storage over a network, powerful in addressing, failures and redundancy.
Could anyone figure out which devices these are? It seems ...
4
votes
1answer
69 views
In what scenarios would a VLAN not align 1:1 with a subnet?
Under what scenarios would a VLAN not align with a subnet. I've been told that genearlly they always go 1 to 1. What are some examples or scenarios, and reasons for anything besides that, and for what ...
0
votes
2answers
31 views
sftp concurrent connection
I have to setup my server to receive 20-30 concurrent sftp connections from different clients using same username. I've tried to test this simulation user connections with scp.
The problem is that ...
1
vote
1answer
31 views
My CentOS 5.7 server can't access the internet
I have a CentOS 5.7 server setup in my office. I have recently moved to a new router (Linksys E3200) and I don't seem to be able to access the web at all through it (git, yum etc.). All the other ...
0
votes
1answer
28 views
Strange connectivity issues between workstations and Servers
I have a situation whereby there are 3 sites.
Site a - User site
Site b - User site
Site c - datacentre
Site a can talk to site c fine
Site b can not talk to everything in site C
In particular, ...
1
vote
0answers
19 views
Duplicate packets on network after disconnecting wireless access point on separate VLAN
We have a network with a few switches. One of these is a 3com 4500, where there are many computers connected, a custom linux firewall and a wireless bridge. The port where the wireless bridge and the ...
0
votes
0answers
16 views
Some SSL site can't be accessed when using VPNC
I use VPNC connected a Cisco VPN in router, everything ok but some https site like https://api.path.com can't be accessed, the http connection has no problem.
curl look like:
curl -vvv ...
-4
votes
1answer
47 views
Difference in IP addresses
I have noticed that ipconfig and a website that tells you what your ip is, are different.
Two cases:
E.g. I rdp from my laptop to my PC via an IP on that is always in the same network ID (so first ...
-6
votes
1answer
34 views
Windows 2008 R2 Network Connection requiring Local Service as Administrator
I have a windows 2008 r2 server. It will not connect to the network with dhcp. I am trying to not make this complicated, but we had a policy, we do not know which one that did something to the ...
2
votes
1answer
38 views
OpenStack “quantum” network manager and existing bridge/VLAN devices
The Quantum network manager included with recent versions of OpenStack does not support the --bridge and --bridge-interface arguments to the nova-list network create command. Short of writing a new ...
1
vote
0answers
15 views
new IP for ubuntu VPS can't ping outside the box / ssh hangs
my VPS provider just changed my VPS' IP, everything is working (like the webserver) but I have two problems
when I login via SSH after I type the user the console hangs for
about 10 seconds before ...
1
vote
2answers
42 views
Office network and guest network - manage with separate physical servers or a VM on the office server?
I have a beefy server (dual Xenon & 16GB RAM with RAID5) I use as the domain controller and file server for an office network on a dedicated internet connection.
I also have a guest network with ...
0
votes
1answer
30 views
How do I connect my dd-wrt router to another wireless network and ensure that all my clients connect only to the dd-wrt?
Here's my situation: I have my internet connection provided by a wireless network (we'll call it "A"). I don't have a lot of control over that network, though. I have a wrt610n flashed with dd-wrt, ...
0
votes
1answer
58 views
Ubuntu 12.04 Apache Sluggish Performance
I've got two installs of ubuntu 12.04 running on VMware ESX host servers and I'm getting very sluggish performance loading web pages from apache compared to the other servers I have on the same data ...
0
votes
1answer
27 views
why ttcp duplicate 4 first byte of my data?
I want try to use ttcp for send udp data like below:
echo 12345 | ttcp -tup 123 10.0.0.123
but when I see in wireshark actually sent 5 packets
in first one 12345
and in others 1234
why ?
2
votes
2answers
61 views
DNS loadbalancing
I have several server. We want set up new big service (word 'big' came from my boss :P ).
I want use two Cisco LoadBalancer ACE 4700 but what will it happen if one of ACE is down?
So I want setup DNS ...
0
votes
4answers
52 views
Monitor file copies with SCP done via SSH
Is there a way to keep a log of the files copied using SCP? I am administering a server which contains some files that should be monitored (in a specific folder and its subfolders), so when someone ...
0
votes
0answers
26 views
Please help me decide what I need for a small business network [closed]
I have a network at a small office (about 15 employees) that is often going down briefly or becomes impossible for certain computer to join unless the whole router is restarted. I am thinking of ...
5
votes
2answers
59 views
Monitor Size of the CAM Table on a Cisco Switch
We noticed some stray packets from our switch going out ports they should not have.
After clearing the cam table with clear mac address-table the problem seems to have gone away. Our best theory at ...
1
vote
1answer
35 views
Secure tunneling options between datacenters
My setup is main website server in one datacenter and mirrors in multiple other datacenters.
I'd like to know what are my options to transfer traffic secure and stable between servers?
Ssh tunneling ...
1
vote
1answer
42 views
What is the safest way to set up SQL Server for remote access?
I'd like to be able to make my dev database server accessible over the internet. I and half a dozen dev applications will be the only users. I have a hosting account that includes SQL Server, but I ...
1
vote
2answers
49 views
Virtual Machines on same ESXi 5 host: what kind of throughput should I expect?
Created a new vSwitch with no physical network adapters and no VLAN tags assigned to it. Left it at 120 ports as default, labelled it "Private Network".
Added a "Flexible" network adapter to each ...
0
votes
1answer
44 views
Permanently assigning IP address for an embedded device
This is a follow-up to Embedded device configured with bad IP address, can I still connect?
We make embedded devices that run Linux. Users can change the networking configuration of the device ...
0
votes
0answers
22 views
Shares on Windows 2003 SP2
I have a network with Shared folders, only certain groups are supposed to get into them, but when I test a new account, it would seem that the new account can get into the folders even tho the name is ...
0
votes
0answers
23 views
Configuring separate network interfaces for internal and external traffic
I have a VM that I would like to do some network experimentation on. Currently it is running Xubuntu 12.04 on VirtualBox but I'd be willing to change that up.
I would like to have 2 network ...
0
votes
2answers
40 views
Hosts uses Server IP address instead of its dedicated IP for outbound connections
I have a cPanel installed dedicated box.
All of the hosts thats are in it have their own IP addresses.
However when I try to connect to bank's POS system, host uses server IP.
Why do hosts not use ...
1
vote
2answers
96 views
Multiple ip to single interface
i'm using openstack, but i think this is a more general problem. Actually i've a dedicated which comes with 1 ip address, i bought another one, and added using openstack's nova-manage cli.
So now ...
2
votes
1answer
30 views
FreeBSD - monitor aggregate bandwidth of individual local network devices
I'm looking for ways to monitor the Internet usage - the total amount of data transferred - of individual devices on my network. I'm using FreeBSD 9.0-RELEASE with pf for filtering and NAT. I'm not ...
0
votes
1answer
35 views
Simple KVM with NAT networking won't run
I'm trying to set up a test VM in KVM according to the steps described here:
https://wiki.iac.isu.edu/index.php/KVM_Virtualization#Example_vmbuilder_Commands
My host system is Ubuntu 10.04. This is ...
2
votes
2answers
56 views
How to Enable Full-Rights File-Browsing on /?
Now, I know there are lots of samba questions (about 1400) on ServerFault, and I have browsed through about half of them at least, and not been able to use any of the answers to solve my problem.
We ...
0
votes
4answers
236 views
Ubuntu Server 12.04 can access LAN but not internet
Using Ubuntu Server (12.04) via command line, I can access the LAN (e.g. ping local machines) but not the internet (e.g. "ping google.com" or "sudo apt-get update"). How should I troubleshoot this?
...
0
votes
0answers
11 views
oracle proxy connection
I have a standard 3-tier of web, app, oracle db servers.
currently due to network policies, the web cannot access the oracle db and instead is required to go through the app. is there anyway i can ...
0
votes
3answers
41 views
Bridge ppp0 and eth0
I have seen many posts explaining bridging eth and wlan interfaces. I would like to know if it is possible to bridge ppp0 interface (a USB modem) and eth0. I have a working internet connection through ...
0
votes
0answers
22 views
Free shared host domains/reverse whois tools? [closed]
I was wondering if anyone was aware of some good, free web services for finding the domain names used by one IP address (usually for shared) and for reverse whois lookups?
Examples of finding domain ...
