Managing and using network connectivity on a unix system

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How to limit network bandwidth after some data transferred?

So the question is in the name of topic. How to limit bandwidth I know. Using tc. But how to do so after, for example, traffic had reached 500MB. And after some time reset the limits.
2
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1answer
133 views

WITHOUT using network command lines in linux, how to know list of open ports and the process that owns them?

I want to know which ports are used by which processes in embedded-linux. Since it is simple embedded-linux, there are no network command lines such as netstat, lsof. (only basic command lines such as ...
2
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0answers
32 views

Confusing my IP stack

At work, I have an Oracle GRID/RAC cluster of two hosts, including Oracle's SCAN functionality. Picking one host: eth0 is the management port on 169.254.10.25. eth1, eth2, and eth3 comprise bondeth0 ...
25
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2answers
2k views

Can TCP provide more than 65535 ports?

Is it possible to setup a Linux system so that it provides more than 65,535 ports? The intent would be to have more than 65k daemons listening on a given system. Clearly there are ports being used ...
0
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1answer
81 views

Possible to Host LAMP VirtualBox for Internet Site [duplicate]

Can someone explain briefly, or point me to, how to host a LAMP server on a Linux-based VirtualBox (Oracle) such at the web site on the VB are accessible to the outside world? The Host itself would ...
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2answers
45 views

How to I fetch the very latest DNS records from a recently updated domain?

I recently updated my domain and added CNAME and TXT records, and don't want to wait for the changes to propogate. How can I go directly to the source and query the DNS records to verify everything is ...
1
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1answer
74 views

openvpn routing

So far I have successfully created a virtual link between server A and server B using an unencrypted openvpn tunnel. I am trying to route some of server B's traffic through server A. Server B has 5 ...
1
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1answer
73 views

binding to remote IP

I have two servers and would like one server to be able to use some of the other's external IPs. Server A has 20 IPs and server B has 5 so I want B to use 5 of A's IPs. How would I go about this? ...
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0answers
42 views

OpenBSD Atheros AR8151 no Ethernet media present

I installed OpenBSD 5.5 on an ASRock AD525PV3. The board uses the mentioned Atheros LAN. It shows alc0 on ifconfig, but the media only has Ethernet manual, and I can't use the LAN. Is there a way to ...
0
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1answer
24 views

How to configure internet connection in X Window System applications? [closed]

I have to work on a Windows machine which I'm using as a client for my external RedHat machine. According to my job requirments I need to use some X window apps which are hosted on the Linux machine. ...
2
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3answers
546 views

MySQL Workbench Cannot start SSH tunnel manager

I don't know why this error is happening when I try to connect by MySQL Workbench. Cannot start SSH tunnel manager. I'm using slackware 14.1 and installed all dependencies.    
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1answer
275 views

VNC Server without X Window System

Will a VNC server work without X Server installed? I know vnc works with X Server, but what about without it?
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1answer
45 views

Why DNS server changes when enabling another interface on machine

My system has 6 interfaces, a loopback, a Xen Bridge, and then 4 ethernet interfaces eth0-3. In this system, my DNS server assigned by DHCP on xenbr0 is 192.168.1.1. Initially eth1 is disabled and ...
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1answer
94 views

How do I know all IP related to the wireless LAN in ubuntu 14.04? [duplicate]

How I know all IP on my LAN Wireless using ubuntu 14.04
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0answers
172 views

Port redirection on loopback with IP other than 127.0.0.1

I want to redirect port 80 on the loopback network interface so that accesses to that port actually go to port 8080. I tried using the following command, but it only works if the application is ...
1
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0answers
88 views

iptables server behind NAT accessible from outside as well as inside the nat

I have 2 machines with a KVM running on each machine - so two kvms with the below networking Host 1: 192.168.10.100 (eth2) 10.10.100.1 (virbr1) KVM 1 (NAT with Host 1): 10.10.100.128 (eth0 ...
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0answers
21 views

Xen Domain0 cannot access internet while DomainU can

I am Using all this setup on VirtualBox VM with network interface NATing with original Windows machine. I have installed Xen on Ubuntu 12.04. From Dom0, I could access internet before I installed ...
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1answer
963 views

make[2]: *** [sub-make] Error 2 make[1]: *** [all] Error 2

I tried to install MADWIFI on my OpenMediaVault-Server. Any more information needed? I get this error, every time i enter make: root@NAS2024:/media/5703066A59887FF7/Dsys/madwifi-0.9.4# make Checking ...
0
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2answers
110 views

What is the simplest method to redirect traffic using either a proxy or iptables?

I need to redirect all incoming traffic on port 7777 to a specific destination_ip:port. I have about 40 Litecoin (scrypt) mining rigs that I have to manually reconfigure each time I'd like to switch ...
1
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1answer
141 views

Networking between two Virtual machines on different hosts

I have openSuse installed as a virtual machine(Oracle Virtual Box) on DeskTop(win 7), and another openSuse installed on as a virtual machine(Oracle Virtual Box) on my Laptop(win 8.1). Please see the ...
6
votes
1answer
62 views

FreeBSD systat doesn't calculate upload speed/total on wlan0

When I call systat -if shows that wlan0 out traffic/peak/total are 0 kb(/s). I'm using wlan0 for networking, internet down/upload are working. The in traffic/peak/total are OK. The wifi chip is ...
2
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0answers
30 views

iptables drop length and TTL condition doesn't work

With iptables utility on Linux host need to create mini firewall. I need to drop all incoming connections with package length greater than 722 AND TTL greater than 22. Need exactly AND. Drop only if ...
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0answers
34 views

How to run a specific TCP client with a different IP?

My server has 3 ips. I use cronjob doing some api job. But this api has some limit: 100 calls/day. So how can i set a special ip for running some special script via cronjob? Thanks. 0,20,40 * * * * ...
0
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1answer
94 views

Ping to my own public IP results in host unreachable

First of all, I'm running a Manjaro 3.10 (Archlinux x64) install. I'm trying to make my No-IP configuration work. I have tried to ping my no-ip host and I recieve host unreachable ICMPs only. I was ...
1
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1answer
86 views

How can I allow applications to bind to any address in a subnet assigned to an interface?

I recently got a static IPv6 /56 prefix of my own from Freenet6, and am trying to allow applications to bind arbitrary addresses in the prefix. I modified the tunnel creation script that gogoc uses in ...
2
votes
1answer
44 views

How can I make sure that eth1 get its fe80 IPv6 address immediately on startup, even if it's not physically connected?

I'm working on an embedded-x86 Linux device that runs Debian (Linux 3.8.13). This device has two Ethernet ports, eth0 and eth1. If I boot up this device with only eth0 connected to a switch, and ssh ...
2
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1answer
299 views

Change IP remotely over ssh

I am using CentOS. I have a management server which has password-less ssh access to four other servers. I don't have physical access to these servers. In other words, I have to make all ...
1
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0answers
25 views

Ajax-y sites load sloooowly or not at all. [Ubuntu/Mint]

About two months ago I reinstalled Ubuntu onto my desktop machine. Since doing so I've had a lot of problems with certain websites and very slow or complete loading. It seems to be related to use of ...
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votes
1answer
98 views

ifconfig shows only lo

I'm a beginner using Debian. I've just installed Debian 7.5.0 amd netinst. Actually I am trying to install the firmware through aptitude install firmware-linux-nonfree When I executed ifconfig and ...
0
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0answers
597 views

Help with Setting up network connection in Debian 7.5.0

I'm a beginner using Debian. I've just installed Debian 7.5.0 amd netinst. When I execute apt-get update I get errors like: Could not resolve 'http.debian.org' Thus I changed the mirrors several ...
3
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1answer
237 views

Good detailed explanation of /etc/network/interfaces syntax?

I understood the very basic concept of how to use /etc/network/interfaces, but all I find online are examples, example after example, which I can copy-paste from. What I miss is an explanation of the ...
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0answers
171 views

How to setup proxychains in VirtualBox Guest Kali Linux

I've been following directions from this book "Kali Linux Cookbook", but I can't get proxychains to work. The OS is Kali Linux and running inside VirtualBox. The guest network is a Bridged Adapter. ...
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4answers
100 views

Why does *BSD uses driver specific names for network interfaces? Does it imply limitations?

I notice that depending on the brand of the network card, interface names differ (driver dependent I suppose). Why does *BSD uses driver specific names for network interfaces? Does it mean there is ...
0
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1answer
64 views

Get a faster response for a ping

I noticed that the answer to my ping is slower in one debian machine that another. For the first one when i ping to 8.8.8.8: 64 bytes from 8.8.8.8: icmp_req=1 ttl=47 time=29.6 ms For the second ...
1
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1answer
54 views

Parabola installation, “network is unreachable” despite working ping [closed]

I am trying to install Parabola(closely related to Arch Linux). As my wireless adapter does not work with linux due to some firmware issues, I have to use a wired connection. So, while a ping to ...
5
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1answer
126 views

Skip routing via `lo` interface for outgoing packets

Introduction I have following load balancing configuration: 10.0.1.31 - lb 10.0.1.35 - virtual IP 10.0.1.32 - node1 (tomcat + mysql) 10.0.1.33 - node2 (tomcat + mysql) I'm using keepalived which ...
4
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1answer
127 views

LXC container to use “virtual” interface from host (namespace semantics)

So according to the documentation on the Ubuntu LXC documentation the following statement can be found at the time of this writing: A NIC can only exist in one namespace at a time, so a physical ...
1
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1answer
71 views

Virtual always connected network interface with static IP?

How do I create a virtual, always connected network interface with a static IP on Linux? It must work when all my physical interfaces are disconnected. Looking for general information regarding this, ...
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0answers
26 views

I'm wondering about CUPS security. What can I do?

I run Debian Wheezy on a old Acer Aspire One ZG5 model netbook as a server. I have a printer shared to all my other systems and I'm worried about security. On the server I have IPtables set up to ...
3
votes
1answer
87 views

Blocking Websites with /etc/hosts

There's a website, www.example.com, that I tried to block myself from accessing because it wastes too much of my time. So I configured my /etc/hosts file. I added the following lines, to block the ...
1
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1answer
82 views

A question about wlan0 / eth0 and wireshark

I'm using wireshark to listen to packets on my own personal home network. I have my Desktop with Debian and Windows 7 running and my laptop is running the same setup; Debian and Windows 7. I ...
6
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3answers
468 views

What are the benefits of using several IP addresses on a server?

With ifconfig, I am able to configure multiple IP addresses on a single network interface card. Why would I want to do that and how would I later utilize several addresses, e.g. how does software know ...
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2answers
617 views

How to make traceroute trace beyond 30 hops?

Some of the servers I use traceroute on, are more than 30 hops away. How do I make traceroute trace beyond 30 hops?
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2answers
68 views

How to estimate server's network connection quality with traceroute?

I need to estimate network connectivity of various dedicated server hosting providers, e.g. how fast and uniform will my services perform when hosted there. I use traceroute command on my home ...
2
votes
1answer
47 views

Non-administrative network-related tools

I know there are tools to inspect packets (e.g. wireshark) or to simulate latency/packet loss (e.g. netem), but they all seem to require administrative permissions to inspect/modify packets. I'm ...
2
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0answers
56 views

sctp traffic generator

I'm looking for a free SCTP/TCAP traffic generator (specially for MAP, Camel and INAP protocols). I need to build some message flow scenario and generate load in order to test some application Thanks ...
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2answers
67 views

simply change IP after installation on server minimal

I'm using CentOS 6.5 minimal. Is there any way to display a dialog to change the IP after login? In other words, some way of entering a command with a dialog to change the IP?
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0answers
10 views

Reverse proxy for OVZ containers

Is it possible to use a reverse proxy to channel all network traffic from one domain to a single container using the same IP for all the domains? The reverse proxy would have to read the domain and ...
2
votes
1answer
68 views

Hosting on freeBSD

I already installed FreeBSD 10, Apache 2.4 and PHP 5.5. I also just bought a domain from GoDaddy, and I would like to setup a web-hosting in my server, in order to make my website to be reachable from ...
0
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2answers
109 views

ping not working for google alone

one of my friend changed some network config in my laptop at home, He said he tried something related to block a website(he tested it with www.google.com).Now www.google.com not loading . Even he dont ...