the IP protocol and IP addresses

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if a HTTP request is like HTTP://IP/path with a http proxy, will it go to Internet or Ethernet [on hold]

AWS enterprise VPC http proxy exists Without the HTTP proxy, curl http://169.254.169.254/lastest/meta-data successful, but disconnect to the Internet. This IP address is not Category A, B, C. Use ...
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1answer
22 views

Why do I have more packets than bytes? [on hold]

I don't know how to explain this. mind blown. ip -s link 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000 link/ether RE:DA:...
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2answers
54 views

Is there a way to figure out a modem/router web IP address? [on hold]

I bought a Modem/Router d-link dsl-2750u couple of years back. I changed the web IP Address and now I don't remember what IP Address did I put in its place. Is there a way to figure out at what IP ...
3
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0answers
25 views

“ip route get” shows wrong source IP address

I have a machine with an interface which has two IP addresses: inet 192.168.1.15/32 scope global eth0 inet 10.10.118.45/24 brd 10.10.118.255 scope global eth0:hosts4 If I execute for example ip -s ...
1
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1answer
41 views

List *all* IP routes to a destination in the Linux routing table

ip route get 2607:f8b0:4005:804::200e will show me the best (longest prefix) route to google.com, but it does not show all routes that can take me there. Right now I am using ip -6 route show | grep ...
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4answers
489 views

How to check if any IP address is present in a file using shell scripting?

I have a script that generates some output. I want to check that output for any IP address like 159.143.23.12 134.12.178.131 124.143.12.132 if (IPs are found in <file>) then // bunch of ...
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2answers
32 views

How can I resolve an IP address to a hostname in Arch Linux? [duplicate]

What is the most concise way to resolve a hostname to a local IP address in Arch Linux?
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1answer
12 views

OpenWrt: do manually configured ip assignments survive a reboot?

As far as I know if I want to make an ip address static, I have to put it into /etc/ethers file. But does it survive a reboot 100% (stored in persistent storage)? I don't want to mess with it and ...
1
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3answers
54 views

Dnsmasq points nonexistent subdomains point to local IP

There's a specific remote subdomain mymachine.home.com whose the IP changes on all the time that I need to update DNSMasq to have it resolve correctly. But I tested pinging xxxxxx.home.com which ...
0
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1answer
33 views

view IPs from apache access.log for date period

I have seen someone use this command -- and it works where it pulls back all the IPS in a list/group: cat access.* | awk '{ print $1 }' | sort | uniq -c | sort -n However, I want to choose the past ...
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5answers
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terminal command | grep IP

ifconfig -a | grep 10.16 inet 10.16.x.xx netmask 0xffffff00 broadcast 10.16.x.xxx inet 10.16.x.xx netmask 0xffffff80 broadcast 10.16.x.xxx I have replaced the numbers with x My aim is to ...
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2answers
35 views

check ip address of a linux server to upload the file [duplicate]

I am working on a linux server remotely. Are there any command that can allow me to figure out the IP address of this linux server, so that I can ftp some files to this server.
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0answers
26 views

Are source IPs included in Linux's Ephemeral Port Uniqueness?

From http://aleccolocco.blogspot.com/2008/11/ephemeral-ports-problem-and-solution.html (2008) Linux shares the assigned list of ephemeral ports across all local IPs for unconnected sockets. ...
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0answers
44 views

Is IP over USB 3.1 type-C between two Linux hosts at 10Gbps possible?

I've been unable to determine on my own if I can do this. I'm wondering if it is possible to connect two Linux systems with USB 3.1 with type-C connectors to setup a point to point network (IP or ...
0
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1answer
27 views

prompt for network setup during kickstart installation centos7

I am trying to set the ip manually during kickstart installation using centos 7. During the installation it has to prompt for the network setup. I tried using the below configuration : network --...
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4answers
86 views

Extracting IPs from a web list

I am trying to extract IPs from a huge web generated list which contains a mix of text, IPv4 & IPv6 IPs, newlines, IP ranges etc. Below is a snippet from the list: ; Spamhaus DROP List 2016/07/...
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1answer
31 views

change IP address

I tried to change my private IP address with the following commands: sudo ifconfig wlp3s0 down sudo ifconfig wlp3s0 192.168.1.12 sudo ifconfig wlp3s0 up They just work fine becouse the IP changes ...
2
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2answers
78 views

i don't get ipv6. Why cannot I ping ipv6.google.com?

I am trying to send ipv6 pings from a computer in a LAN. Unfortunately it does not work. It seems that I have an ipv6 address in the LAN, but somehow the ping -Ieth1 ipv6.google.com just prints a ...
0
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2answers
52 views

Why can't I configure a static IP on my CentOS7 system?

my /etc/sysconfig/network-scripts/ifcfg-eth0 is like this: And I have issued the command "systemctl restart network". But when I issued "ifconfig", it shows that the ip on eth0 is 192.168.1.117,but ...
0
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0answers
14 views

Configure vpn and non-vpn proxy or how to let application bypass a vpn

I have icedove configured with a gmail account amongst others. However everytime I use or change a vpn, google complains and icedove can't receive the gmail emails. The process to fix this is rather ...
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0answers
58 views

tcpdump: Couldn't find user 'pcap'

I am using RHEL 5.4, tcpdump is already installed also there is a user pcap but I am getting following message. [root@localhost ~]# tcpdump tcpdump: Couldn't find user 'pcap' [root@localhost ~]# ...
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2answers
88 views

Can not ping other nodes in private network

I am setting up a small cluster (four nodes running ubuntu14) and I have this configuration: # Internet and lab - 192.168.10.0/24 iface eth0 inet dhcp dns-nameservers 192.168.100.1 # privte network ...
1
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1answer
45 views

NIC cards in a LINUX server

I have below doubts, Can someone clarify, please? Four interfaces(say eth1, eth2,eth3,eth4) are configured with different subnet IP addresses in my LINUX server, so does that mean are there four ...
1
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2answers
178 views

move IP address from one interface to another without interruption

When I need to move IP address from one interface to another, I have usually done simply for example ip addr flush dev eth0; ip addr add 10.10.10.181/26 dev eth0.35 over an SSH session. So far I have ...
1
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1answer
29 views

Use same IP for 2 Ethernet Adapters in different Physical networks

We have a Linux Panel with 2 Network Interfaces. On this Panel runs a software wich needs to comunicate to our devices in our network, and needs to be accessible from the customers network. One ...
3
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1answer
36 views

Can I get just the list of network interfaces from ip?

I am looking to retrieve a list of network interfaces. Currently I am returning the results of ip addr and then doing some regex/string searching from output like this: 1: lo: <LOOPBACK,UP,...
3
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0answers
17 views

What is the default behaviour of IPv4LL on Linuxsystems?

I'm looking for a good source and confirmation about Dynamic Configuration of IPv4 Link-Local Addresses. The rfc Dynamic Configuration of IPv4 Link-Local Addresses didn't really help answer my ...
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0answers
20 views

Why I'm able to configure IP address on bridged interface?

Consider following bridge setup: brctl addbr mybridge brctl addif mybridge eth0 I see a lot of people failing their setup on configuring the IP on eth0 rather than the mybridge interface, so I was ...
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0answers
18 views

If it possible to permanently set a loose source routing option to all ip packages to a specific ip address?

First of all, the loose source routing is a kind of ip options which requires a selected hop to route this package. I wonder if it possible to set loose source routing option on specific ip packages(...
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3answers
247 views

Append data of multiple files to new file separated by a line

I have more than a hundred firewall rules for many different customers in discrete files in a folder. Suppose the filenames are: 1.wawa.com_firewall_rule 2.newa.com_firewall_rule Each file ...
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Report Multiple IPs to tracker rtorrent

There is an option in rtorrent to report an IP to the tracker. I have a seeding rtorrent box connected to 4 WAN connections. I have configured port forwarding on all 4 wan connections and also made ...
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0answers
35 views

Does anyone use Netem anymore? Alternatives?

When simulating an IP network you can use Linux built-in network emulator Netem. Together with bridge-utils of course. Simulating packet drop, duplicate packets, jitter et cetera. Is anyone using ...
2
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1answer
56 views

Unprivileged ping6 not working

I am trying to get my CentOS v7 server to run IPv6. Root works, it can ping using "ping6 ipv6.google.com", and ifconfig looks great; I see the lines: eth0: flags=4163<UP,BROADCAST,RUNNING,...
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0answers
51 views

DHCP to assign different addresses for multiple interfaces and subnets

First of all, I'd like to point out that I've read any related questions asked here. So, on my desktop computer (running Ubuntu) I have three NICs - eth0, eth2, eth3. I have links connecting these ...
4
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2answers
80 views

Send my IP to remote server every time booting

I want to send my computer's IP automatically every time it boots. I edit /etc/rc.local sleep 10 ifconfig > /tmp/myip scp /tmp/myip <server> exit 0 I tried, and there is no inet addr, ...
1
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1answer
37 views

tcp tunnel inside local network with iptables and bridge involved

I want to configure outside and inside forwarding rules to behave the same way, and simplified problem that i have with 'inside part' is like this: if i have compA - eth0 192.168.0.1 compB - br0 ...
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3answers
29 views

Can I skip some IPs returned by DNS round robin?

archive.ubuntu.com returns 4 IPs. 2 of them are much faster, the slowest one is an order of magnitude slower. Can I disallow some IPs selectively?
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1answer
22 views

can a service like isup.me be duplicated on the system for self? [closed]

The Internet or Web as I understand it runs on variety of servers. The browser is the client which gives a URI or URL which tries to go through varied ways to connect to the web-page and render the ...
1
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1answer
86 views

Openvpn exclude ip in pool

I have an OpenVPN server running on a Linux Ubuntu box. Multiple clients connect to this server (500+) and that is why I set the server-bridge option like this: server-bridge 10.0.100.1 255.255.0.0 ...
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2answers
71 views

check if ip is available [duplicate]

Is it possible to check if ip is free with a script pseudo code would look something like this if [ip is available] echo "IP is available" else echo "IP is not available" fi Can ping be used ...
2
votes
1answer
66 views

User mode linux eth0 connected to host tap ethernet device not coming up

I am trying to setup the network between UML instance running on ubuntu as host. UML--eth0-(192.168.0.254) ----------------tap0--(192.168.0.253)--VM But, I am not able to bring the eth0 device in ...
0
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1answer
117 views

SSH connection giving Connection refused error

I am using CentOs. I can SSH from local machine to server A. I can also SSH from local machine to server B. But I cannot SSH from server A to server B: $ ssh -p <portB> root@B root@B's ...
0
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1answer
30 views

Understanding Iptables rules to prevent DDoS

Following IPTables rules exist on my system as some preventive measures against DDoS attacks -A INPUT -s 255.0.0.0/8 -j LOG --log-prefix "Spoofed source IP" -A INPUT -s 255.0.0.0/8 -j DROP -A INPUT -...
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0answers
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Static ip definition for wlan0 not working

I am setting up a web server on my raspberry pi. I want to connect it to my router via ethernet (static ip) but if the ethernet is disconnected I want it to automatically start using the wifi (static ...
1
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1answer
38 views

What ip address shall I use? public IP or private ip? [closed]

In AWS environment, we usually have two ip address, public one and private one. When we login on to the host, we use public ip, and we edit hosts file, we use private ip, is it right? What is the ...
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0answers
24 views

Trace route taken through multiple simulated link clicks on the Linux command-line

I have a Twitter post which links to a website. The website has a counter on it that checks the number of people who have accessed the page. However, I noticed that when looking at the Twitter ...
3
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1answer
47 views

Unable to access internet after making ip static in beaglebone black

I am newbie in Beaglebone black. I am trying to make my IP static in my Beaglebone black. For this I follow this tutorial. After making changes according to tutorial, my /etc/network/interfaces file ...
5
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4answers
272 views

Is there a way to find self's dynamic public ip address using cli in Debian? [duplicate]

The easiest/simplest understanding of the web is a. When you connect to your ISP, the ISP gives a dyanmic address (like a temporary telephone number) only for the duration of that connection, the ...
2
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2answers
70 views

Static IP configuration on openSUSE

Long-time Windows user here -- this is a beginners question, network-configuration (especially on Linux distributions) is not my area. I believe I've done my research, however. Although I might've got ...
0
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1answer
79 views

Trouble Creating Virtual_IP for PaceMaker + Corosync - CentOS 7

Ok so I have gotten fairly far into the configuration successfully, the two nodes have authenticated each other and all is well, but when I try to add the virtual_ip it never starts. What i've used ...