Managing and using network connectivity on a unix system

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2k views

Ubuntu: wire network is not stable and must restart network-manager periodcally

I don't know why my wire network now is not stable. After a short time of using, maybe 30 minutes, 15 minutes or maybe just 2 minutes, my network is down. When my network is down, I must run this ...
2
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2answers
3k views

Cannot connect to fedora on port 80

I can't access to my local sites on a fedora machine from ubuntu. In firefox I get this error: The connection has timed out In fedora iptables I added this line: -A INPUT -m state --state NEW ...
4
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1answer
55 views

Is it possible to set interface name permanently in Raspbian?

I'm using 2 wifi dongles. First one is used to monitor and second one is used to access internet. Even if I changed /etc/udev/rules.d/70-persistent-net.rules as below, at startup sometimes wlan0 ...
1
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1answer
210 views

Solaris 10 IPMP and zones

Is there a way to have an IPMP group Virtual IP only be assigned to a none global zone ? The reason I ask is the need to reduce the number of IP addresses, as we only have so many spare. If I have ...
1
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1answer
663 views

MacOS X Mavericks running VirtualBox cannot communicate with Linux VM

I have a MacOS X Mavericks host running Vagrant using VirtualBox as a provider. I have experienced several times that with different VMs (particularly Ubuntu Linux VMs) after the first time the VM is ...
6
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1answer
927 views

What do I need to add a virtual IPsec adapter?

I'm trying to set up an IPsec connection manually from the console with iproute2. What I need is a virtual interface (at best, a virtual IP address could also be sufficient) that IPsec-transforms ...
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0answers
10 views

Share Oracle Database Connection from one system to another in same network

I have installed Oracle 11g XE in one machine, which has cent os 6.5 installed in it. Now i want to connect to this machine's oracle database from an another machine. Both are connected to the same ...
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0answers
19 views

Ethernet USB dongle works then randomly drops until restart

I've been using xubuntu 14.04 as my daily driver for a while now, as I've been getting into web development. I'm using a dell ultrabook that has no ethernet port (XPS 12 9Q33), and so I have usb 2.0 ...
1
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1answer
773 views

Arch Linux Ethernet to WiFi bridge

I want to use a Raspberry Pi running Arch Linux to extend my WiFi network. My situation is that I have a spare WiFi router that I want to use to expand my WiFi reception range as well as give me a few ...
9
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1answer
714 views

Why my ethernet interface is called enp0s10 instead of eth0?

Just that, when I run ifconfig -a I only get lo and enp0s10 interfaces, not the classical eth0 What does enp0s10 means? Why is there no eth0?
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103 views

Is it possible to throttle upload bandwidth per `IP` basis using `tc`, `htb` and `iptables` ? (Download limitation not required)

Problem I've searched internet like anything but couldn't find much about limiting upload. The solutions given are not limiting IP basis like this one but LAN as a whole. +-----+ ...
7
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1answer
958 views

Unable to configure eth1 and eth2 properly on Ubuntu

I am completely new to network administration, and so am finding things a bit tough. I have a machine, whose 1 interface I have to set to the subnet 10.0.20.0/24, another to 10.1.0.0/24 and a third to ...
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15 views

Wicd cannot detect wireless networks on Point Linux OS

I have just installed Point Linux OS on my PC. The problem is: it cannot detect wireless networks, but it is okay with wired network. Please help me.
2
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0answers
189 views

What are bogus file nlink values?

I am using files from a SMB share on my Raspberry Pi, running Raspbian. Whenever I access those files, I get the following message in my syslog: CIFS VFS: bogus file nlink value 0 What does that ...
0
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2answers
759 views

Realtek drivers prevent detection of eth1 interface?

Here's the situation: I had a working network setup on my Debian box, with two Ethernet interfaces being reported by ifconfig - eth0, and eth1. eth0 is an onboard Realtek NIC, and eth1 is a D-Link ...
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0answers
20 views

Converting a raw print data stream containing PCL commands to PDF

I have a program that sends raw print data through samba to typically PCL compatible printers. The program is written so basic PCL commands control how it prints. When sending it to the printer it ...
1
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1answer
47 views

routing table “220” in Linux kernel 3.2.0-23-generic

I have a Linux machine with kernel 3.2.0-23-generic and it has rule with priority 220 in RPDB which points to routing table named "220": T42:~# ip rule show 0: from all lookup local 220: ...
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2answers
2k views

Split DNS (bind9), match-clients any doesn't work?

I've been fighting with this for the last few days. A few of my entries have external and internal IP's. My internal network is 10.0.0.0/8. When I nslookup pc1.clase.net internally it responds with ...
2
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1answer
48 views

wlan0 device missing

I can't seem to get my wifi working and I feel i've exhausted google's search capabilities. Here is the output of lspci for the device 02:00.0 Network controller [0280]: Broadcom Corporation ...
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1answer
38 views

How do I install a network printer without being dependent on the IP-address of the printer?

In Linux I want to install a HP LaserJet 1320n that needs to be power up and down. It will get a new IP-address every time it's powercycled. How can I install the printer on a Linux machine and not be ...
0
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1answer
36 views

Finding out the number of dropped packets in raw sockets

I am developing a program that sniffs network packets using a raw socket (AF_PACKET, SOCK_RAW) and processes them in some way. I am not sure whether my program runs fast enough and succeeds to ...
2
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2answers
78 views

How to share one internet connection from LAN to another LAN?

I have a Raspberry Pi connected to a router (Router1) with internet connection in en0, with IP 192.168.1.110, however I have my RPi's wifi port (wlan0) connected to another router (Router2) with IP ...
2
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1answer
52 views

routing cache in latest Linux kernels

As I understand, routing cache was removed since Linux kernel 3.6. In systems with older Linux kernel one could view the content of the routing cache with ip route show cache command and routing ...
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1answer
1k views

Trouble switching from DHCP to a static IP on Kali Linux

When I installed Kali Linux 64bit, I forgot to set up a static IP address, and now DHCP determines my address with my router. I have already modified /etc/hosts and /etc/network/interfaces to declare ...
0
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1answer
3k views

Linux Mint 17, Wifi Slow and Drops Connection, No Ethernet Connection

On a fresh install and updated Linux Mint 17 XFCE, the system cannot maintain an internet connection through wifi, and is unable to connect at all through ethernet. Wifi will work somewhat slowly for ...
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1answer
14 views

Need to write an automated web navigator with “click” and “retrieve” capabilities

In our company, several clients provide the detailed information information that we need in a web site. The amount of time that our employees spend navigating the remote website is simply ridiculous, ...
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0answers
27 views

Required new 'X' desktop for VNC?

I'm on Raspberry pi 2, running Raspian, and using Ubuntu 14.04. I am using the tightvncserver. I don't think I should have to start a new 'X' desktop each time I want to VNC into the pi, but whenever ...
2
votes
1answer
37 views

IP address alias? E.g. map 203.0.113.37 to 127.0.0.1?

I want to use an SSH tunnel to work on a project, -L 8080:localhost:80. When opening http://localhost:8080 on my local machine things work, but the server (MediaWiki) is putting a lot of ...
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0answers
72 views

Ubuntu 15.04 wired connection keeps dropping and restarting

I've finally switched to Linux (Ubuntu 15.04) 2 weeks ago and everything went well. But unfortunately after turning on my PC today and doing the usual (sudo apt-get update, sudo apt-get dist-upgrade) ...
4
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2answers
1k views

NAT and source IP filtering in PF, using OpenBSD >= 4.7

I just read a book about PF (The Book Of PF, No Starch), but there's one question not answered by it. If I have a gateway machine using two interfaces, $int_if and $ext_if, and I NAT the packages ...
2
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1answer
3k views

Iptables forward with pptp and openvpn

I have OpenVPN and PPTP installed on a VPS. I'm having a few questions that I can't seem to get a firm answer on. I want to install OpenVPN on 1.1.1.1 (eth0, public IP address) and PPTP on 1.1.1.2 ...
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0answers
23 views

VPN: Script at /etc/ppp/ip-up.d/ not autoexecuting on PPTP connection established

My PPTP client is Ubuntu Desktop 14.04.2LTS. My PPTP Server is a Buffalo DD-WRT Firmware. If I establish my PPTP VPN connection (named Themiscyra): luis@PortatilHP:~$ sudo pon Themiscyra ...
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0answers
39 views

VirtualBox network interface with custom CIDR and internet access

I have an OpenStack setup running on VirtualBox. The host OS is Ubuntu, and the guest OSes are all Ubuntu. I use 3 VirtualBox VMs to setup and install OpenStack. My OpenStack setup further spawns ...
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3answers
712 views

Rsync connection reset by peer

rsync --protocol=29 -rav -e ssh --include '*/' --include='*_en*.xml.gz' --exclude='*' user@server:/path/ Content is downloading from remote server but after while I get this error: Write failed: ...
1
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1answer
11 views

Setting up QEMU and MIPSEL : networking trouble

I have a MIPSEL machine running on QEMU. In order to enable networking inside my qemu MIPSEL machine, I use a bridge virbr0. First, I create the interface tap0 and bring it up. I do it as follows :- ...
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0answers
20 views

Route dies on Ubuntu 14.04.2

So I have this routing setup in EC2 on a Ubuntu machine: 10.50.0.0/24 dev eth0 proto kernel scope link src 10.50.0.163 x.x.x.x via 10.50.0.80 dev eth0 proto static y.y.y.y via 10.50.0.80 dev ...
3
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1answer
541 views

How do I create a USB networking interface for passing internet to my Android phone?

I am working on passing through the internet from my computer to my phone (running Android) over USB. I'm not sure how to achieve this, but I know I will need a usb network interface, such as usb0. ...
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0answers
40 views

Getting error in nslookup

I am trying to do nslookup skhdphost1 but I am getting below error. When I try to Reverse lookup checking using command nslookup 172.16.xxx.xx again getting the same error: The error message is: ...
1
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2answers
1k views

ping: unknown host with iptables enabled

I can't ping www.google.com. However I can ping the IP address: ping 74.125.237.142 At first, I thought it is a problem with my DNS settings. But I checked my resolv.conf, hosts, and hostname ...
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2answers
597 views

Check that fail2ban is running?

I just installed and configured fail2ban. I want to make sure it is working. I don't want to block myself from the server so I can't just login (poorly) a bunch of times. How do I see that fail2ban is ...
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0answers
42 views

How to find out the wifi sensitivity (RSSI)

I want to be able to get the received signal strength indication from my computer's wifi interface, ideally as expressed in dBm. This article explains what I am after.
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0answers
25 views

Cannot connect to public IP address of server used as VPN gateway?

When I try connect to the public IP address of server that is also used as an openvpn gateway from a Windows computer within the network it fails to connect, but if I connecto the VPN ip address it ...
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0answers
45 views

IP packet forwarding in Debian

I have a physical network set up with machines A←–→B←–→C.  IP and Ethernet configurations are summarized as following: A(eth0: 10.10.10.2) ←—→ (eth0: 10.10.10.3)B(eth1: 192.168.0.3) ←—→ (eth1: ...
2
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2answers
892 views

SIOCSIFADDR: File exists after upgrading kernel

Since upgrading my (Gentoo) kernel from 2.6.38 to 3.3.8 (via oldconfig), I can't get the network on eth0 up anymore. It reports "SIOCSIFADDR: File exists" with a number of other SIOCSIF* errors that ...
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0answers
22 views

FreeBSD: Control operational and administrative status of virtual interface

I'm looking for a way to freely control the administrative and operational status of a virtual interface as seen by a snmp get requests: $ snmptable -c public -v 2c myserver iftable SNMP table: ...
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0answers
41 views

Having problems when connecting pppoe in my Kali Linux

Here is my log: Jun 6 04:57:23 unknown pppd[3333]: pppd 2.4.5 started by root, uid 0 Jun 6 04:57:36 unknown dbus[2534]: [system] Failed to activate service 'org.freedesktop.Avahi': timed out Jun 6 ...
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2answers
657 views

How to monitor network performance for each application in FreeBSD / PC-BSD?

I'm using a PC-BSD workstation, and I would like to know if there is a way to monitor which app / process is using the network. I use a Mac OS X (Mavericks) laptop, and the "Network" tab in the ...
0
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1answer
47 views

SSH from different countries with openvpn configured on pfsense and dd-wrt?

I have vpn set up in two different countries A (primary, where I live) and B (secondary, which I visit once or twice a year) and would like to SSH to my devices across the vpn. My Setup: Country ...
0
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1answer
1k views

Mint 15 on Lenovo G700: wired internet not working (Atheros QCA8172)

Mint 15 doesn't see internet after installing it in dualboot with windows 8 (in Windows internet works well). My network card is Qualcomm Atheros QCA8172 Fast Ethernet (rev 10). What I did: Install ...
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0answers
22 views

Can I inherit iptable rules on/under windows? [migrated]

Don't really want to purchase a VPS just to test some iptables stuff for my gameserver. Was curious if it's possible to load up debian on vmware player and install nginx, nodejs, mysql, etc (which is ...