A computer network allows sharing of resources and information among interconnected devices.
0
votes
1answer
50 views
Samba connection slowness after ip change
we have encountered with a problem when we chaged the samba server's ip address. There are so many OS varies from Windows,GNU/Linux, Solaris and IBM.
The samba server is running on SOlaris. And all ...
21
votes
1answer
437 views
Why does it take up to several minutes to clean a listening TCP port after a program dies?
If I kill a program that is listening on a TCP port, it takes up to several minutes until the port is reclaimed by the system and usable again. I've seen several Q/A mentioning this phenomenon, but ...
2
votes
1answer
139 views
Very slow response from localhost when pinging
Networking is working fine on my gentoo machine. One connection is made, everything works fine with normal speed. But it is slow to wake-up : starting up connection is taking time. Even pinging ...
0
votes
1answer
217 views
Use of /etc/sysconfig/network-scripts/ifcfg-eth* files
What's the use of /etc/sysconfig/network-scripts/ifcfg-eth* files ? In some cases ifconfig lists the interface eth0 but I don't find the corresponding ifcfg-eth0 file whereas in other instances if I ...
3
votes
2answers
147 views
Use an USB tethered phone as network adapter
I am running CentOS 6 and was able to tether my HTC phone using a proxy called proxoid . This allows me to redirect HTTP. But how do I redirect the entire TCP traffic, e.g. if I need to setup openvpn ...
2
votes
0answers
39 views
Solaris 11: How to use ILB to create HA loadbalancer across two backend servers?
I'm attempting to use Solaris 11's ILB to create a loadbalancer across two backend DNS servers. Here's my requirements:
Two external IPs: .XXX.YYY, .XXX.ZZZ - these are the DNS IP's that our clients ...
1
vote
1answer
177 views
Guest OS Ubuntu 12.04 no network connection
Recently added a new *.VDI image with Ubuntu 12.04 to my existing VirtualBox. The machine hangs with a "Waiting for network configuration" error, eventually times out after 60 seconds and boots in ...
2
votes
2answers
61 views
Remote access SSH problem
I have been asked to setup a lab with 1 PC (fedora 18 OS) and 4 SGI (IRIX 6.5 OLD OS).
I am using a switch to connect them to university's network, and I asked tech guys to assign static IPs to them. ...
11
votes
4answers
282 views
Is there a top-like command that shows the network bandwidths and file accesses of running processes
For example, we'd like to see:
PROCESS IF TX RX FILE(regular) R/W
prog1 eth0 200kB/s 12kB/s -- --
wlan0 12kB/s 100kB/s -- ...
-1
votes
2answers
229 views
Unable to connect to remote host using ssh
I have recently installed Fedora in my system. But I am facing some problem in ssh login from remote machine.
I am able to login in that system but every time its requires me to login using GUI in ...
3
votes
1answer
87 views
Is there a way to renice the network stack?
I have an ARM Linux board that is a router to 16 other boards. When all these download their updates via the router, the network routing effort starves the user space so that a software watchdog (and ...
2
votes
2answers
461 views
Network naming on Arch Linux
I've just installed Arch Linux on my old PC, to do the installation I used wifi-menu wlan0, now I've reboot but if I type:
ifconfig wlan0 up
I have as a result:
wlan0: ERROR while getting ...
0
votes
0answers
112 views
get RSSI using commands?
mu network is group created by WIFI DIRECT, so i need to measure the signal strength RSSI between the client and its owner for android platform.
So, assume we know SSID and MAC address for owner or ...
0
votes
1answer
172 views
How to monitor other nodes to get RSSI?
I need to measure RSSI between two peers of nodes in same network.
If I have these two information:
SSID for their network.
IP for the target node to get the RSSI regarding it.
So I found this ...
1
vote
2answers
233 views
Why TCP TIME-WAIT State is present at both ends after a connection termination?
I am reading how the TCP states work and especially the connection termination part.
All of the books or online material I read, shows that for the termination procedure these states are followed ...
3
votes
3answers
89 views
How to use a “hardware key” to control Linux networking
Sometimes I have trouble controlling myself while in front of the computer and I tend to procrastinate a lot doing Internet surfing. Fortunately I do not need Internet for most of my work.
So I would ...
1
vote
1answer
128 views
No DNS on Debian wifi after unplugging the DNS cable
I have installed wheezy Release Candidate 1 to my old laptop (Benq Joybook A52) right now, and I have some problem with my wireless card (Atheros 5006). It can actually see the wireless networks, I ...
3
votes
2answers
271 views
Getting current TCP connection count on a system
Instead of doing wc -l /proc/net/tcp, is there a faster way of doing it?
I just need a total count of tcp connections.
3
votes
2answers
186 views
tshark dump only when string is matched
I'm working on a web capture script where I only want to dump the traffic if the HTML body or URL contains a string defined in a .txt file.
Here is my tshark command which dumps src ip dest url (HTTP ...
1
vote
1answer
113 views
With two interfaces, how can I make one the default route and the other an alternate?
I have wired connection to intranet / lan of my work (with proxy) and one wireless without proxy that doesn't have access to the office lan. (Like Guest Wifi)
My idea is to route all traffic to eth0 ...
2
votes
2answers
196 views
Can conky monitor other Linux computers on the network?
I know conky can monitor my personal computer, but can it monitor the other Linux servers I have on the network? I'd like to see data on CPU and memory usage and some critical processes each server ...
0
votes
0answers
293 views
Openswan established NATed tunnel but, I can't ping remote end's lan PC
I am establishing site to site tunnel.
192.168.2.0/24===10.103.6.40<10.103.6.40>---10.103.6.1...10.103.6.29<10.103.6.29>===192.168.1.0/24;
Local ip: 10.103.6.40
Local lan: ...
2
votes
1answer
130 views
Route SSH to host through interface
is it possible to route all outgoing requests for SSH (port 22) to mydynamicdns.afraid.org via wlan0 instead of eth0 when both are connected?
Since my IP is dynamic, I would like to use a name ...
1
vote
1answer
177 views
3G-modem for Linux supporting USB 3.0
I've laptop with three USB3.0-ports.OS is Linux Mint 13 (yeah, it's Ubuntu-based). My modem Huawei E1552/E1800 could work in two modes:
1) as flash with drivers
2) modem
The device is operating as ...
1
vote
1answer
76 views
Help understanding interfaces in Backtrack
I am fairly new in UNIX and have recently installed backtrack on a VMWare box on my machine and I am trying to use DHCLIENT command but am having trouble in understanding the interfaces.
I am ...
1
vote
1answer
87 views
How can I disable IPv6 in custom built embedded setup
I have an embedded system built using buildroot. I have had a number of network issues, one of which is that my machine cannot see its gateway despite it being on the same subnet. I have tried using ...
1
vote
0answers
116 views
lxc networking quesion
I have a similar requirement to the OP of this thread.
I want the following configuration:
-Physical host (PhyHost) reachable from the network at IP 10.1.101.89
-LXC container (LxcHost) ...
2
votes
0answers
99 views
Periodicaly dropping packets [closed]
I'm here on an Ubuntu 12.10 Dell machine. Every 8.5 minutes packets get dropped, I don't lose the connection completely but for some seconds, no connections are successful. I had this problem before ...
1
vote
0answers
59 views
Network not working after fiddling with webmin
Can some please help me restore my networking? I have a VPS CentOS 6.3. Few minutes ago it was working well, Except I couldn't connect to the Yum repository. So I thought I could change some settings ...
2
votes
1answer
96 views
Incoming/Outgoing seperation for VPN
My situation is that I want all my outgoing connections from my Debian server to pass through a commercial VPN service I've subscribed to, but I still want to run public-accessible services on this ...
3
votes
1answer
76 views
Alternative to mrouted for DVMRP on Debian Squeeze
I need to implement DVMRP protocol to route multicast over Openvpn (tun) connection for some old 3Com NBX phones.
I use Debian squeeze so mrouted is not available (obsolete).
What can I use ...
5
votes
1answer
110 views
Simulating user activity
I want to simulate user activity on a virtual machine in a completely automated maner. That is, I would like to run a program or a set of scripts that would simulate an user using a computer for an ...
1
vote
1answer
100 views
ifconfig: more different device items than physical NICs/sockets
I have a simple router for home users (D-Link DIR-300) with embedded Linux (kernel 2.6.21) and a bunch of networking tools. Inspecting the internals of of this system through telnet, I've got this ...
0
votes
2answers
155 views
Is /etc/resolv.conf needed when using a static IP address?
I am trying to configure the IP address of my embedded device. The device should have a static IP address and I attempt to set this using the /etc/network/interfaces file with
iface eth0 inet static
...
1
vote
2answers
106 views
Can Linux PC serve as network router?
I was wondering if it is possible for Linux PC to substitute router in small networks.
I'm not expert in networking so this question may be stupid, but I don't see why one should not use Linux ...
0
votes
1answer
64 views
Unable to get embedded device to ping anything on the network
I have an embedded device, built using buildroot, kernel version 3.6.11 running busybox. The kernel is built with completely default options. I have configured the device according to what the network ...
2
votes
0answers
207 views
ping receives no packets, but tcpdump can see them coming in
I'm migrating an old Ubuntu OpenVZ instance (Jaunty) to a new CentOS 6.3 host (using vzdump/vzrestore).
Now networking does not work properly. Facts:
It works just fine if a setup a new OpenVZ ...
2
votes
1answer
206 views
enable networking inside a freebsd jail
So I'm mostly a linux newbie itself. Let alone freebsd, so please bear with me. I just need some very basic clues to get this to work. I use FreeBSD 9.1 64-bit from the list here.
On my freebsd ...
1
vote
1answer
259 views
Command/scripts to check the Reverse DNS Lookup time
I am working on a project in which one master communicates with numbers of slaves. For that it has to make connection with hosts in network. But sometimes it hangs.
I think that the reason behind is ...
1
vote
1answer
164 views
Mint: equivalent command line call for airplane mode
OS: Linux Mint 14
Can someone suggest how to turn on airplane mode from command line instead of using the GUI?
Also can someone list what all are turned off by enabling airplane mode?
or how to turn ...
0
votes
0answers
40 views
Wired connection going through wrong router
My son has a problem not getting a cosistant wifi signal in his bedroom so he uses another router wired to the gateway. The problem I have is that when I connect to the gateway his router issues me my ...
0
votes
1answer
281 views
Allowing access to NetBIOS port in Fedora 18?
I've recently installed Fedora 18 on one of the machines in my office, and I've installed Samba so I can browse the file system on my Windows machine.
However, I'm having some trouble opening port ...
0
votes
2answers
248 views
Heartbeat with virtual IP at Ubuntu 12.04
I have installed heartbeat package at both linux devices so that when ever clients request a service they will be arrived to this IP, and client will not know what are the back-end/actual ip addresses ...
1
vote
2answers
70 views
Ephemeral port : What is it and what does it do?
I suddenly came across the term "ephemeral port" in a Linux article that I was reading, but the author did not mention what it is.
What is an ephemeral port in UNIX?
1
vote
1answer
88 views
kvm guest Network interface no Authenication
i have a kvm host based on ubuntu 10.04 host , and the guest is rhel 5.3 64-bit,
on the guest i tried to execute mii-tool eth0
SIOCGMIIREG on eth0 failed: Input/output error
SIOCGMIIREG on eth0 ...
0
votes
1answer
66 views
NSLookup how to interpret output
Hi can someone help me to understand what this NSLOOKUP command's output
[x]$ nslookup sample.abc.com
Server: 161.43.32.162
Address: 161.43.32.162#53<-- ???
Name: sample.abc.com
...
0
votes
1answer
80 views
How do I safely perform the below changes to network parameters on Solaris 10?
I need to change and test some TCP/IP network parameters on a Oracle Solaris 10 as a possible workaround for a bug in 'Oracle Hyperion EPM 11.2.1.0' in the development environment.
I am not a ...
1
vote
0answers
174 views
Ubuntu 10.04 kvm Virtual Machine guest network speed slow
i have the following situation, i have a kvm host ubuntu 10.04 LTS 64-bit network host speed is perfectly run , as i am testing network speed using iperf , the speed between any network device and the ...
1
vote
2answers
85 views
2 ip ranges / 1 nic OR why does one ip range follow default route before local routes
Updated at the bottom
I'm using Centos as a router, and just replaced the routing system at work. I've got 2 routers to send data around. For the most part it's working. On one router I have 2 ...
1
vote
1answer
181 views
How do I access a web server behind NAT and proxy?
I have installed a local web server for an web application for a customer. Their server is behind NAT and uses proxy for access internet.
Is there a way to access the web application remotely from ...
