Managing and using network connectivity on a unix system

learn more… | top users | synonyms (1)

0
votes
2answers
161 views

Unable to telnet public ip on port 80

We are facing a communication problem between the public and our private network. We have a Linux based web server behind a firewall and an internet router. As part of some integration, our web portal ...
2
votes
2answers
117 views

Primary network interface in Linux

I have a server box with two interfaces. One of the interfaces is connected to the internal network, another - to external. I have assigned IP 192.168.1.200 to internal interface (eth0). I have some ...
3
votes
1answer
43 views

NTP with networks isolated

I have a computer (CentOS) with 2 network cards. I want to use one network card (A) to retrieve time from NTP server (internet). This would then set [this] local computer's time. I then want to ...
1
vote
1answer
57 views

Madwifi VAP (and wlanconfig) modern equivalent

It appears that the Madwifi project is deprecated, so I am curious if there is a replacement for the wlanconfig utility that allowed users create Virtual APs. I did search for wlanconfig in my package ...
2
votes
1answer
134 views

How configurable is MPTCP?

I work on embedded Linux devices that usually have hard wired Ethernet as well as cell modem connections. If I were to use MPTCP would it be possible to easily configure the system to use eth0 all ...
2
votes
2answers
120 views

Bonding two broadband connections to serve LAN as a gateway

I need to increase the connectivity and speed of the Internet to my LAN users. These are the things I have in my hand to do so. PC with 3 NICs 1 for LAN and 2 for routers 2 broadband connections ...
0
votes
1answer
61 views

Route a local connection via an ethernet link in QNX

I am currently facing a challenge in QNX, where I have 2 Network Interfaces - viz. one Network port from PCIe Ethernet Expansion card (wm0) and other from the normal Ethernet port (en0). I have ...
1
vote
2answers
68 views

Stop netcat when VirtualBox closes

Using netcat to redirect print output from DOS program in VirtualBox under OSX. #!/bin/bash VBoxManage startvm FreeDOS while : do nc -l 1235 | lpr done This works except that when VirtualBox ...
1
vote
0answers
63 views

Is this kernel warning a major problem that needs my attention?

Our Linux based Thecus N12000 NAS recently experienced this message in its dmesg log. [2014-05-21 11:34:56] ------------[ cut here ]------------ [2014-05-21 11:34:56] WARNING: at ...
0
votes
0answers
49 views

problem with airmon-ng start waln0

I'm new in Kali Linux, I have a USB wireless adapter, Realtek RTL8187 wireless802.11b my command airmon-ng it shows the waln0, but when I type the command airmon-ng start waln0. It doesn't show ...
1
vote
1answer
66 views

Nmap too slow with a network that can't access to internet

I am using CentOS 6.5 and Nmap 5.51 I want to find all alive IPs in a LAN between two IPs Easily get the answer sudo nmap -sP 192.168.1.100-200 my problem when my network can access to ...
2
votes
1answer
63 views

Getting a list of WiFi networks nearby when the adapter is in AP mode

I am trying to get a list of wireless networks nearby while the adapter is acting as an access point but iwlist returns the following error: $ sudo iwlist wlan0 scan wlan0 Interface doesn't ...
0
votes
1answer
113 views

BSNL 3G USB modem not connecting

I am using Arch linux (fully updated). I have been trying to get my BSNL 3G usb modem to work to no avail for the past couple of hours. I have already installed modeswitch, wvdial, modem manager, ...
1
vote
1answer
30 views

Redirect packets and save the content to disk

I want to reroute a connection just like rinetd does but save the client and server messages. Is there any tool like this out there ? I'm using Debian.
1
vote
0answers
29 views

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
votes
1answer
165 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
votes
0answers
35 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 ...
26
votes
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
votes
1answer
86 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 ...
1
vote
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
vote
1answer
90 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
vote
1answer
81 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? ...
0
votes
0answers
53 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
votes
1answer
25 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
votes
3answers
782 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.    
1
vote
1answer
462 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?
-1
votes
1answer
51 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 ...
-4
votes
1answer
126 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
1
vote
0answers
270 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
vote
0answers
124 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 ...
0
votes
0answers
26 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 ...
0
votes
2answers
127 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
vote
1answer
198 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
67 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
votes
0answers
34 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 ...
1
vote
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
votes
1answer
144 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
vote
1answer
97 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
54 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
votes
1answer
358 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
vote
0answers
29 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 ...
-2
votes
1answer
160 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
votes
0answers
653 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
votes
1answer
416 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 ...
0
votes
0answers
244 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. ...
7
votes
4answers
112 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
votes
1answer
73 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
vote
1answer
60 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
votes
1answer
159 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
votes
1answer
193 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 ...