Questions tagged [ip]

IP - Internet Protocol, the most commonly-used set of rules for dispatching data across a large computer network.

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Subdomain with variable IP

Subdomains like http://3qax.munzer.webproxy.idc-lorien-apiver01-repay-action.bh-arppofind.comssets.mealcardhss-int-bh-awwwppofind.wire.2.homeetingroom.walmartmobile.cn presents a behavior that when I ...
Felipe's user avatar
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How to enable access to IPv4 users?

My router works with IPv6, I tried to open a IPv4 server but due to CGNAT no one could access my web server. I asked to some friends to test it, those without IPv6 couldn't reach it. ReqBin also could'...
Eduardo Procópio Gomez's user avatar
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Linux Kernel IP Forward activated, firewalld is bypassed?

On a Linux Centos7, I have some traffic that is routed with static routes from one interface to another. I did notice that with firewalld activated, both interfaces added in a zone, and nothing ...
Carbon69's user avatar
3 votes
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What can cause 'Network is unreachable' when the link is up, the route is there, and the netmask is correct?

What could cause this? $ sudo ip route show 192.168.100.0/24 dev usb0 ...
Adam Bliss's user avatar
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Proxy with mobile IPs

How can websites, like BrightData, rsocks.net, and others, offer a proxy product that is using a mobile IP address? To my understanding, mobile operators block all incoming communications in their NAT....
A-S's user avatar
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2 Different Public Address for High Availability

this is my first time asking a question here, and I was wondering is it possible to have two different ISP public IPs connected to a single system for high availability? for example, if our ISP 1 ...
Nät Castaritas's user avatar
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257 views

Why does facebook only have 2 IP addresses? [closed]

In the process of setting up DNS for my own website I got curious about looking up a large company's DNS record. I chose facebook.com and used dnschecker.org to view their dns record. Ignoring AAAA ...
Currn Hyde's user avatar
-1 votes
1 answer
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find the ip address on Linksys [closed]

I get two differents Linksys routers : WAG54GX2 and WAP54G. I tried to get the IP address to reset the routers correctly and verify if they are still working. So I use the RJ45 cable on my routers and ...
Eloise's user avatar
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How to access IP4 server from IPv6-only MacOS client

My telco provider made some unannounced changes to my iPhone's hotspot settings last week, whereby they essentially disabled my phone's hotspot from providing its clients with IP4 (DHCP assigned) ...
gone's user avatar
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How do Virtual IPs allow fast switching?

I am designing a simple fail over system with just a primary and standby server. The main one will be in our office, while the standby will be on the cloud. I was reading about virtual IPs and how ...
user1034912's user avatar
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ssh into a server without a public IP from a server without a public IP that is hidden behind a server with public IP

I have the following setup: I would like to access machine A from machine C, but neither of those have a public IP address. Machine C is, though, in the same network as machine B, which has a public ...
karlosss's user avatar
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Flushing IP table doesn’t flush NAT

When I execute sudo iptables -F,my iptable rules for the nat table are not flushed. Why is this the case? What does the above command do? I believe there are three tables: filter, nat, and mangle. I ...
average_coder25's user avatar
8 votes
1 answer
24k views

Wireguard - How to only tunnel some of the traffic

Is it possible to set up the Wireguard server so that only a list of ips [A, B, C,...] is tunneled via Wireguard - while the rest of the traffic is ignored and goes through the non-Wireguard interface?...
Symeof's user avatar
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Tracking the IP and Physical address of the machine originating an email message

My organization is using Google's email services for the creation and management of their email accounts. Recently, an objectionable email was sent from a Gmail ID (presumably a fake account created ...
Muhammad Adeel Zahid's user avatar
3 votes
1 answer
2k views

How can i bind a network interface to an entire /48 subnet of IPv6 addresses without having to enumerate each and every individual address?

Context I need to know how to setup an entirely /48 IPv6 block in my server to perform outgoing requests with any of these IPv6 addresses without setting up each one individually. My ISP provides this ...
João Scheuermann's user avatar
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208 views

Are their public IP ranges which don't belong to any country?

I've been working on project and we use IP geo-location using an API to identify user's country. The legacy code has an edge case when there is no country information for a particular IP. I have been ...
CodePanda's user avatar
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Why is net-dhcp-leases coming up empty in VIRSH?

From the following command virsh net-edit default, I see: <network> <name>default</name> <uuid>7a106327-942a-40e7-a977-018b5323832a</uuid> <forward mode='nat'/&...
average_coder25's user avatar
-1 votes
1 answer
1k views

Router doesn't have a public ip adress

I have a problem with my ISP where my router gets a different ip adress compared to my external ip adress (the router doesn't have a public ip adress). I previously setup a VPN service with EdgeMax ...
MaxK123's user avatar
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2 answers
137 views

Redirect IP to another if not available

I have 4 IPs something like that 10.10.10.11 10.10.10.12 10.10.10.13 10.10.10.14 and two ports 1000 and 1001. my Linux server should connect those IPs with ports. Now I want to make this process ...
coder's user avatar
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2 votes
1 answer
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All Outbound Traffic Uses IPV6

I have a Debian 10 server which has postfix installed, each time I try to send outbound mail traffic, the server uses IPV6 over IPV4. This causes postfix to log Connection timed out. I have tried ...
Ruby's user avatar
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Security issues with configuring default IP address(0.0.0.0) to ethernet interface

In our linux embedded application we would like to keep available ports up and running and assigning with 0.0.0.0 IP address. In short we will be executing all ports with ifconfig ethX 0.0.0.0, and ...
Gilson PJ's user avatar
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1 answer
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How to create TCP proxy that supports multiple hosts?

I would like to create a TCP proxy that supports multiple hosts. The example I saw was where a DNS server was used to point a specific host to a TCP proxy which had the host hardcoded in it. The TCP ...
comctimert's user avatar
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1 answer
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Is it possible to force the DHCP server to assign a different IP address each time the address is renewed?

I need to detect IP address renewals in my C++ Linux application and check if the new address is different from the old one. I have access to a router running OpenWrt. I can change the lease time, but ...
tom654321's user avatar
1 vote
1 answer
56 views

How to configure and use all the IPs given by my provider?

Need assistance on how to use all the Ips given from my hosting provider. Currently i have 5 IPs that is routable and can be used on any circumstances. I wanted to make a new environment on my ...
Newbie's user avatar
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1 answer
788 views

Fail2ban with Firewalld on RHEL 8 - Fail2ban seemingly blocks IPs, but they are not really blocked

I'm running fail2ban on RHEL 8 using firewalld. According to the fail2ban log (with DEBUG level) it blocks IP addresses without any error, but in fact there are no such rules in firewalld and nftables....
user766753's user avatar
0 votes
1 answer
346 views

Wildcard SSL not working for subdomains

I have a wildcard SSL for my website, I want to access my site using any subdomain like abc.immersive.com,xyz.immersive.com etc. I tried to ping these sites, its pinging successfully and pointing to ...
Techleadz Team's user avatar
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0 answers
39 views

On premise SpamTitan appliance injecting IP routes

We recently migrated to a new firewall and most things were okay apart from email flow. There was a queue on SpamTitan which wouldn't release. When I checked the routing table, rather than using the ...
Slipgate's user avatar
0 votes
1 answer
176 views

finding which tier 1 or isp to connect to to reduce latency [closed]

I am looking to connect to 4 location p,q,r,s. I a ntrying to find the set of locations where I should connect to (isp or pop) to minimize latency . Is it lower latency to connect to a tier 1 network ...
roller's user avatar
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Why is a host sever location displayed differently?

I am very new to this field, and would like to get an explanation on the mechanism of the below. When I check the location of a host server, sometimes they show the location differently. For example, ...
koyamashinji's user avatar
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1 answer
652 views

Connecting Computers accross different subnets or IP addresses

I have a setup that involves: Cable modem/router at 192.168.10.1 Wireless Router 1 at 192.168.20.1 Wireless Router 2 at 192.168.30.1 The wireless router are connected to the Cable Modem via the WAN ...
Chris's user avatar
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0 votes
1 answer
339 views

No gateway / LAN without internet / CCTV system

I've tried to post this on superuser.com but they don't accept questions from Tor network now for more than a week so I hope I can find help here since we could say it's network administration ...
johnymcdoe's user avatar
0 votes
2 answers
5k views

Issues with Ubuntu Network Setup

Please, someone tell me whats up here, I am going bonkers, I have used multiple calculators etc, everything tells me the details in the image are correct but ubuntu just will not accept.
Ron Appleton's user avatar
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2 answers
501 views

Why we would need public IP in LAN vs NAT

could somebody explain why I would need some public IP for an equipement inside the LAN while I could NAT it ? Why a company could be provided a full subnet of public ip and not just one for the ...
bupmm's user avatar
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0 votes
2 answers
2k views

Ubuntu 20.04 cloud image can't get IP address

When using virt-install to create a guest, CentOS 7.9 cloud image successfully gets an IP address, which can be checked with sudo virsh domifaddr <domain>. However, Ubuntu 20.04 LTS cloud image ...
os_user's user avatar
0 votes
1 answer
112 views

Decoupling IP address from hosting provider

We run a service that provides on demand websites to our users as part of our offering. In order for our users to use their own domain with our website feature, we have them create an A record to our ...
Eran Galperin's user avatar
0 votes
1 answer
106 views

WebRTC Grandstream UCM6510

Some times the webrtc transport connection is stablished but when I observe in chrome://webrtc-internals the dtls session in that transport it stays stucked in “connecting“ and the remote certificate ...
Leonel Franchelli's user avatar
2 votes
0 answers
74 views

Is there a way to have pacemaker resource groups failover if all floating IP resources are unavailable?

I want to have multiple floating IPs in a resource group that will only failover if all IPs cannot work. Each floating IP is on a different subnet and can be used by the application I have. If a ...
dev4life's user avatar
0 votes
1 answer
2k views

How to accept request with port after domain in nginx

I have a subdomain https://test.shop.com, I'm running a Nginx server and it's working fine. But I have to accept the request with https://test.shop.com:8080/graphql/ and redirect to http://127.0.0.1:...
Shahrear Bin Amin's user avatar
2 votes
1 answer
733 views

My network interface changes names, so DHCP / dhclient cannot operate on it

On some ArchLinux servers I've switched from dhcpcd to dhclient, but the servers are not receiving IP. Upon inspection with journalctl I see that, on all occasions the IP was not received, dhclient ...
haelix's user avatar
  • 217
1 vote
1 answer
941 views

AWS EC2 Elastic IP vs Public DNS Hostname?

What is a better approach for a webserver using EC2: to use its public DNS hostname as a CNAME record, or to attach an Elastic IP to it and use it with an A record? I suppose using the (elastic ip) A ...
FLUSHER's user avatar
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1 vote
1 answer
968 views

Azure Virtual Machine Scale Set - Networking per Virtual Machine instance

If you were to create a Virtual Machine Scale Set in Azure, with one NIC attached to it, will this same NIC be used for all of the Virtual Machine instances in the Virtual Machine Scale Set, so that ...
user8973449's user avatar
1 vote
1 answer
72 views

Is there any way to allow a group of ip in the certain range to access my website?(Nginx)

Suppose, I want to allow access to my project for the IP falling between 192.168.1.1 and 192.168.1.40. Nginx example: stream { #... server { listen 12345; ...
Atom Store's user avatar
-1 votes
1 answer
403 views

Trying to setup IP addresses on my network

Here's my schema. I'm trying to set up IP addresses to be able to PING from the first floor ( etage 1 ) to the second ( etage 2). I tried setting up an IP address 192.168.233.2/24 with the gateway 192....
xelo's user avatar
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19 votes
3 answers
4k views

What is the name of an IP prefix with prefix length 31? (i.e. contains only 2 IP addresses)

At my job, IP prefixes with prefix length 31 (i.e. they only fit 2 IP addresses) are commonly described at "linknet addresses". Lately I have noticed that this term doesn't appear to exist ...
Hubro's user avatar
  • 1,148
2 votes
1 answer
148 views

Observing conflict on VPN when multiple users on same network attempt to connect and access EC2 Instance behind security group

We have external services that are behind an Amazon EC2 security group, users connect to a VPN (this is supplied and maintained by a third party) so that they are given an IP that is consistent over ...
MattGAD's user avatar
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-2 votes
1 answer
276 views

How to make second IP the “outgoing” one? [Debian/Networking/Docker]

we would like to setup a small transactional email server for outgoing emails to confirm transactions. As IPs are the most important identifier of email servers and whitelisted by the spam checkers, I ...
bluepuma77's user avatar
-3 votes
2 answers
162 views

Do modems have public address? [closed]

I know for a fact that when we are connected to Wi-Fi and we search something in the Internet, the server we are requesting from will return the files to our IP address and this IP address is the ...
Nibin's user avatar
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2 votes
1 answer
4k views

How to connect RDS from a different account with allowed IP in AWS?

I have an EC2 instance in AWS account A. Its Private IPv4 addresses is 10.111.12.23. I allowed it in a RDS security group rules in account B, to make Type CIDR/IP - Inbound's Rule 10.111.12.23/32. ...
Miantian's user avatar
  • 137
0 votes
1 answer
68 views

CentoOS and IP RULE

I don't understand my situation. I have a network lab like on a picture. I can't ping 192.168.5.1 from 192.168.1.2 then the 192.168.5.1 has 192.168.4.2 like a default gateway. Linux# ip route default ...
Paravozik's user avatar
1 vote
1 answer
82 views

In a recursive DNA query procedure, if a local DNS server needs to query root DNS servers, how does it know/get their IP addresses? [closed]

I am taking a computer networks class, and was wondering how a local DNS server knows the root DNS servers' IP addresses when querying them. I am assuming that since this is the root server, maybe ...
Newbie123's user avatar

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