2
votes
2answers
182 views

How to use a defined local IP instead of external one

I have a Gentoo Linux server. Server is connected to two networks: internal and external. Internal network ip: 192.168.1.200 External network ip: 192.168.0.2 If I'm trying to make request from ...
2
votes
1answer
13 views

Where do I find the OID descriptions for SNMPv2 in Linux?

I was looking at this link here: http://www.debianadmin.com/linux-snmp-oids-for-cpumemory-and-disk-statistics.html and noticed that the OIDs are the same ones I see for the same stats for our ...
1
vote
0answers
50 views

where is network layer protocols source code [closed]

that's all I can find tcp source code on my Ubuntu, also the place of data link layer is on the network interface. So where is network layer protocols source code on ubuntu ? Also I am looking for ...
0
votes
1answer
16 views

Static IP addressing issue in Ubuntu on BeagleBoneBlack Rev C

I have my BBB configured to use a static IP address using the following in the file /etc/network/interfaces: allow-hotplug eth0 iface eth0 inet static address 192.168.0.1 netmask ...
3
votes
2answers
47 views

How can I force chrooted programs to use a virtual ethernet device?

First off, this is not for security reasons, or for use in a production environment. It's because I want to mess around with different configuration management systems on relatively low-spec ...
2
votes
1answer
31 views

Lubuntu IP conflict [closed]

I have this friend who recently installed Lubuntu on his Asus Netbook to try it out. Problem is that even though he can find all network connections and after trying to connect to two of them (giving ...
1
vote
1answer
25 views

Interface Priority in the Face of VPN

I have a few interfaces: wlan0, eth0, lo, and sometimes tun0. When I connect to the Juniper VPN, creating a tun0 interface, my existing connections on other interfaces (perhaps with the exception of ...
4
votes
1answer
56 views

Create map network_iface_name <--> IPv4 address

I'd like to implement a bash script that creates a mapping between the network cards (or interfaces) names in my computer and their IP address (in CIDR format, if possible). The goal is having ...
0
votes
1answer
48 views

Trying to connect to gateway in static ip network

I have arch-linux-arm running on a raspberryPi. The network I am in uses static IPs. gateway IP is 192.168.178.5 IP for my device is 192.168.178.201 To connect to the internet I use: ip addr add ...
2
votes
1answer
111 views

set ip default outgoing in centos

I have server which has Centos and I want to change the outgoing IP address. This is the output of my route and route list commands. [root@marketport tmp]# route -n Kernel IP routing table ...
0
votes
0answers
145 views

Apache server in raspberry PI not visible from outside( public IP)

I have made a fresh install of Arch Linux ARM into a Raspberry PI and I mounted there a LAMP, all fresh. I have another Arch(x86) in my laptop with Apache also there, and as far as I know, two web ...
2
votes
0answers
95 views

Network connectivity issue between different hosts from a network namespace in one host

I have created two Ubuntu 12.04 VMs using VMWare Player with NAT network configuration. I am able to ping them from each other. After that, I created a network namespace in one of them and add a ...
2
votes
0answers
36 views

AppArmor Profile: Deny internet access

I want to deny the internet permission for some applications. Therefore, I tried first to deny the internet permission for ping, but it doesn't work. Here is the profile of /etc/apparmor.d/bin.ping ...
-4
votes
1answer
128 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
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
148 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 ...
6
votes
3answers
516 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 ...
2
votes
1answer
438 views

mutliple default gateways for alias interfaces (SOLVED)

Alias interfaces defined in /etc/network/interfaces cannot have multiple default gateways. Unfortunately I would like to use the same interface to access 2 differents nets, and I need to define 2 ...
2
votes
0answers
24 views

Manually adding static ip not resolved after a while

Hi Unix/Linux community, I have a small problem with a device I am connecting to my laptop, running Debian Linux. While connected to a router on my wlan1 interface (using wicd, if that matters), I am ...
7
votes
2answers
231 views

SSH session through OpenVPN cuts off / locks up after a few lines

I have a large number of identical fanless PCs running debian 6 (ARM). Most of these are connected via comcast and work ok. There are some that are connected to 'WiMax' modems and are having ...
0
votes
2answers
142 views

How to determine eth0 gateway address when it is not the default gateway?

In my system I have eth0 (which may or may not be connected) and a modem on ppp0 (which always may be up or down). The the case where both interfaces are up and ppp0 is the default route, I'd like to ...
1
vote
1answer
112 views

Masquerade not working sometimes

I have an issue with private network traffic not being masqueraded in very specific circumstances. The network is a group of VMware guests using the 10.1.0.0/18 network. The problematic host is ...
5
votes
4answers
414 views

History of IP addresses that accesed a server via ssh

It has come to my attention that a server of mine has been hacked and infected with a known chinese botnet. It was a prototype/testing virtual machine with its own static IP(US address) so no harm ...
2
votes
1answer
91 views

How do I create an IPv6 overlay network?

I would like to create host-only IPv6 networks on two hosts and then route between them. On each host, there will be a dummy interface, at ipv6_prefix::9. I would like to be able to ping that ...
6
votes
3answers
263 views

How does one capture traffic on virtual interfaces?

I would like to capture traffic on Linux virtual interfaces, for debugging purposes. I have been experimenting with veth, tun and dummy interface types; on all three, I am having trouble getting ...
1
vote
1answer
79 views

tcp/ip - trigger action or event after period of no network activity on certain port(s)

Is it possible, perhaps using iptables or one of the wrappers/frontends to iptables, to trigger an action or run a script after a certain period of time has elapsed with no network activity on a ...
4
votes
1answer
96 views

Send traffic to self over physical network on Ubuntu

I have a dual port ethernet NIC and let's say I have connected both ports in a loop and assigned the following IPs to the 2 ethernet interfaces: eth2 -> 192.168.2.1 eth3 -> 192.168.3.1 I want to ...
1
vote
2answers
71 views

What could cause a ping request to return inconsistently timed results

Here is a sample run: 64 bytes from 192.168.1.9: icmp_seq=27 ttl=64 time=8852.917 ms 64 bytes from 192.168.1.9: icmp_seq=28 ttl=64 time=7918.074 ms 64 bytes from 192.168.1.9: icmp_seq=29 ttl=64 ...
3
votes
1answer
93 views

tcpdump command works only on local ip

I am trying to capture some IP packets in my personal LAN with tcpdump, through the command tcpdump -A -i eth0 'tcp and (((ip[2:2] - ((ip[0]&0xf)<<2)) - ((tcp[12]&0xf0)>>2)) != 0) ...
0
votes
0answers
135 views

On ssh connection the auth.log shows as source IP the external IP of the server instead of the IP of the client

I have a very odd situation with my ssh connection. Every time I connect to my server, whatever is my external ip, the connection have as source the server's external ip. Example Server S.O.: ...
0
votes
1answer
50 views

IP Prefix - how do I declare this?

Hi I have an IP Prefix issue I would like to declare the following IP's as "safe" using ip prefix "methodology" ("?") The IP's first three parts of the IP have been doctored to protect the innocent, ...
1
vote
1answer
190 views

how to check if the kernel support for ip alias?

it surprisingly that I get no explicit results when I googled "kernel ip alias support", and I have looked up the linux network administrator, 3rd edition, it says: check that you have a ...
0
votes
1answer
61 views

host only ip address: can it be 10.*.*.*?

My router is set to have computers IP range from 10.1.1.1 to 10.1.1.60 I'm trying to run Linux in virtual box in a host computer with windows 7. The host computer has 10.1.1.5 currently, which is ...
1
vote
0answers
108 views

Debian access point is detected, but provides no Internet access

I am use Debian sid. I want to share my network (ppp0) via AP (Access Point) to my mobile device. This is my configuration. /etc/hostapd/hostapd.conf : # WiFi Hotspot interface=wlan0 driver=nl80211 ...
9
votes
1answer
317 views

Send a packet over the network even when its target is the local host

Under Linux if you send a packet to the address of one of its network interfaces, this packet is routed internally, it is never sent over the network. That's the right thing in 99.99% of the cases. ...
3
votes
1answer
103 views

Using shell script to select static IPv4 configuration according to router address

I have Linux Mint 15, I live in a university where the hostel and lab have separate static IP settings. Is there a way to set up the connection mechanism so that my laptop will automatically select ...
4
votes
2answers
313 views

Static IP for 2 PCs on crossover cable in interfaces(5) file?

I've got 2 PCs connected on an Ethernet crossover cable. On PC1 I run: sudo ip addr add 192.168.2.1 peer 192.168.2.2 dev eth0 sudo ip link set dev eth0 up On PC2 I run: sudo ip addr add ...
0
votes
1answer
122 views

Current IP address as visible from the internet? [duplicate]

I know I can get the locally assigned IP address of my current machine by the local router like so: ifconfig However, I want to know what my IP address is as visible from the outside world. Or, in ...
1
vote
2answers
93 views

how to identify IP address on eth0 when console isn’t available

I need help about the following I have very old Linux server with one IP address, unfortunately I can’t to access to Linux machine VIA console and I not remember the IP address So I now thinking ...
1
vote
2answers
2k views

Check a range of IP addresses to see if a host is active

I need to write a bash shell script that will check a range of IP addresses to see if a host is “alive” at that address.I also need to list the IP numbers of those that are “alive”, and provide a ...
1
vote
0answers
62 views

What should be the right dhcp configuration for generating a new network over eth0?

Even not under a real server like scenario, I'm testing with dhcpd for learning and practice purposes. I'm using Ubuntu 12.04 LTS. I want to offer a network by my eth0 interface. I receive ip and so ...
3
votes
1answer
6k views

Set Static IP in CentOS 6.4?

Most guides seem to revolve around modifying ifcfg-eth0, which doesn't exist on my system.. [root@Azaz07]# vi /etc/sysconfig/network-scripts/ifcfg-eth0 [root@Azaz07]# ls ...
5
votes
1answer
9k views

Using ip addr instead of ifconfig reports “RTNETLINK answers: File exists” on Debian

I have a Debian system working as a wireless router with eth0 and wlan0. Now I added an additional network manually on eth1 with ifconfig: alix:~# ifconfig eth1 192.168.0.2 netmask 255.255.255.0 ...
0
votes
3answers
104 views

Why do two Ubuntu systems in the same network behave differently in DNS resolution?

I have two systems, both running Ubuntu 12.04, which are within the same network (connected by hubs without routing logic). Both systems are configured quite similar, but not identical. In particular, ...
1
vote
3answers
591 views

Programmatically extract private IP address(es)

I'm looking for an easy way to programmatically extract the private IPv4 address(es) of a computer. Something similar to this question, but restricted to private IPs. As an example, I can extract ...
3
votes
2answers
384 views

Converting Webserver Logged IP Addresses to DNS

I'm trying to use a bash script to process a webserver log file and replace any IP's it finds with their corresponding DNS hostnames. An example entry of a single line from the log file is: ...
2
votes
2answers
2k views

What does ifup do when “/etc/network/interfaces” has an invalid netmask address?

The interfaces file looks like below: auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 192.168.0.130 netmask 250.255.255.0 gateway 192.168.0.254 As you can see ...
1
vote
0answers
202 views

Share (masquerade) Internet connection from Debian desktop to a bunch of computers

I need to share the Internet connection of my Debian desktop to some other devices (a Mac Laptop, and an Android tablet). The Debian desktop is connected to the local network via eth0, and the rest ...
0
votes
0answers
57 views

When adding a ip via ifcfg how do you have it auto increment the clonenum?

I'm writing a script that adds ips to a multihomed machine. I'm not allowed to use network-scripts folder because well that's what they said. They also stated they wanted to clone num to increase. ...
5
votes
3answers
1k views

Difference between 'ifconfig' and 'ip' commands

I read some articles/tutorials on 'ifconfig' command, most of them included a common statement - "ifconfig is deprecated by ip command" and suggested to learn ip command. But none of them ...