Questions tagged [routing]
Use this tag when the topic is related to managing the paths that IP traffic will take. This includes subnets created by access points, and on the high end it could be multiple feeds coming through a Cisco unit.
374
questions
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2
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405
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What might cause my server to lose network routes?
I'm using a server running Ubuntu to monitor a number of servers in various network zones in my hosting environment. To allow this server to contact all the servers it monitors I manually added a ...
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0
answers
27
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Host can only ping another host if fhe former is pinged first
I have one Ubuntu 18.04 laptop and one Lubuntu 18.04 laptop.
The Lubuntu laptop can't ping the Ubuntu laptop ("No route to host") until the Ubuntu laptop pings the Lubuntu laptop first (which works ...
0
votes
1
answer
99
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Need Help on Ubuntu Server 18.04.1 Static Routing
I am currently having a difficult time configuring a Static Route. I have an Asterisk Server Hosted on my Ubuntu Server Machine, It has 2 NICs
eth0;
IP Address: 172.16.1.99
GW: 172.16.1.1
eth1
IP ...
4
votes
0
answers
7k
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Trying to route traffic through a tunnel server error: "Nexthop has invalid gateway"
Short version: we have servers in another data center and we have an openvpn tunnel between them.
For the first time, I need to hang server on a different subnet from the tunnel server and I'm ...
1
vote
0
answers
62
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What is defining the routing table?
Some script, somewhere, is defining the routing table for a Ubuntu 16.04 system and we can't figure out what.
It isn't in /etc/udev/, /etc/network/, /etc/systemd/, /etc/init.d/ or any other likely ...
0
votes
2
answers
479
views
Two default routes: ethernet + wifi -- error? consequence?
In my netplan config I have two interfaces:
network:
version: 2
renderer: networkd
ethernets:
ethusb1:
dhcp4: yes
dhcp6: yes
wifis:
wlp3s0:
dhcp4: yes
dhcp6: ...
0
votes
1
answer
585
views
VPN configuration with same remote and local gatway IP address
I have an issue with VPN routing when the local default gateway is the same as that on the remote network.
Here is the case config:
VPN network: 192.168.100.0/24
Remote Services network (reached ...
0
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0
answers
191
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Udp Routing with 2 ports
I'm trying to pull udp stream to my ubuntu 14.04 and can't handle routing.
I'm having 2 ports
1. is port with internet connection(local adress)
2. is port with udp multicast streams with dynamic ...
0
votes
1
answer
4k
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OpenVPN tun0 routing on server
I have an OpenVPN tun0 10.8.0.0 255.255.255.0
There is an interface on the server eth1 for 192.168.0.0 255.255.255.0
I would like to route the OpenVPN connections to access the 192.168.0.0 network.
...
4
votes
1
answer
21k
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ip route add -- Error: either "to" is duplicate, or "10.0.0.1" is a garbage
19.04
The system boots without a default route. Then when I try to add a default route, there is this error.
The error occurs even when I completely clear the routing table.
The ip address is ...
1
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0
answers
406
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Need to set default route to upstream DHCP interface on Ubuntu Server 18.04 LTS
I'm building an edge router using Ubuntu Server 18.04.03 LTS and need to configure the routing table to define the default route as being the upstream / WAN interface, which gets its IP address and (...
6
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3
answers
18k
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How to use netplan to create two separate routing tables?
I have an Ubuntu 18.04 host with two network interfaces on two subnets. I would like to set up symmetric routing so that traffic received from one interface is sent symmetrically out that same ...
0
votes
1
answer
311
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Ubuntu 18.04 with routing but need VM bridge
I have set up routing on my Ubuntu 18.04 desktop box. I have one dedicated ethernet port for my internal network that serves DHCP. I have my wireless NIC set up for internet access. Network works ...
1
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0
answers
121
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Ubuntu - Routing between different subnets
Topology
I was looking at the other similar questions and could not find one that matches this one.
I have an Ubuntu VM with 2 different subnets running on Hyper V.
ETH0 - IP 10.10.1.2/24 - GW 10....
0
votes
1
answer
285
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Convert ip route add to netplan state
I am confused a bit about the following command
(we had it in ubuntu 14 /etc/network/interfaces file)
up ip route add local fc00::x:x:x/126 dev bond0
What does 'local' means here, and how do i ...
0
votes
1
answer
61
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Ubuntu 'blocks' one site
So this is something strange..
As a test, I installed a webserver on my workstation (using easyengine).
I installed 1 website on the webserver
I removed the website again, and installed in on the ...
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0
answers
135
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box pulls dhcp addr successfully, but cannot ping gateway or anything else on subnet
My wired ubuntu18.04 box pulls a dhcp address Ok, but cannot ping any machine on subnet. It can ping localhost|127.0.0.1|its own (dhcp) ip.
# ping 10.0.0.1
From 10.0.0.195 icmp_seq=1 Destination ...
1
vote
1
answer
27k
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UFW rules with NAT/masquerading
I am trying to use Ubuntu as a router of a kind by limiting a computer on my private network to what it can connect to on the internet.
The Ubuntu box has two NICs, one is internet facing (enp0s3), ...
0
votes
1
answer
454
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how can I assign routing tables to interfaces which are configured via dhcp
My host has two interfaces with both are DHCP configured.
I do need a default gateway for both interfaces and therefore routing tables with rules for each interface. So it would be good to get all ...
0
votes
1
answer
867
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How to route traffic to an IP to use wlan0 instead of tun0 in OpenVPN?
I'm running OpenVPN on Ubuntu 19.04. I have a VPN connection (OpenVPN) I need to keep up all day. However, there's an IP I want to route outside of the VPN tunnel. This IP should connect to wlan0 as ...
4
votes
3
answers
14k
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IPv6 default route NOT being set netplan Ubuntu 18.04.2 LTS
Am unable to configure the default route using netplan on an Ubuntu 18.04.2 system. The route works when explicit ip -6 route add ... commands are issued.
Privacy extensions have been disabled: /etc/...
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0
answers
129
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Ubuntu as router: Network Layer packets not reaching WAN
I've got most of it working, but can't quite close the loop.
I'm running Ubuntu 18.04.2 on my Raspberry Pi 3. I'm trying to use it as a wireless access point, but not as a bridge. I followed this ...
1
vote
1
answer
1k
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L2TP VPN is Consuming Too Much of Remote Network's Upload Bandwidth
In Ubuntu 16.04, I used the following command so that Network Manager world provide L2TP as an option when adding a VPN connection:
sudo add-apt-repository ppa:nm-l2tp/network-manager-l2tp; sudo apt ...
1
vote
0
answers
472
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Networking question ip routing
Let me start by saying I am a complete novice with very little networking knowledge.
I have set up a VPN via a guide and everything is working fine, however, I would like for the IP routing or ...
3
votes
1
answer
4k
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Routing Docker in ubuntu
In my routing table on Ubuntu 18.04 I have these entries:
172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 br-9f3f970041e3
172.18.0.0 0.0.0.0 255.255.0.0 U ...
0
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1
answer
4k
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Ubuntu 18.04 - no DNS query
I'm running Ubuntu 18.04 on my laptop. I am trying to ping other computers on my local network using their hostname but it's not working.
$ ping ubuntudesktop
ping: ubuntudesktop: Name or service not ...
4
votes
0
answers
852
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Enable packet routing from network interface eth0 to bridge interface
I have a Ubuntu server connect to LAN 10.1.200.21/24 (bond0), and an Macbook connect to LAN 10.1.200.50/24 (eno1)
There are another bridge create by brctl addbr br0 in Ubuntu 10.3.100.1/24, and there ...
2
votes
1
answer
4k
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Docker behind VPN
When I start the company VPN om my Ubuntu 16.04 laptop, I get a bunch of static routes. Among these are 172.26.0.0/16 (I checked this in the kern.log, and it also shows up when i run route). This ...
1
vote
1
answer
530
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Where are Apache logs when installed in a Snap?
ENVIRONMENT
Completely fresh Ubuntu Server installation, and NextCloud installed via snap.
PROBLEM
Browser requests to public IP over WAN time out when routed to Nextcloud server.
Meanwhile, browser ...
1
vote
1
answer
6k
views
How to add routes
In windows I add to the routing table:
route add 159.182.151.0 MASK 255.255.255.0 159.182.152.110
How to add similar to ubuntu ?
thanks.
1
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0
answers
73
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Port activity after applying iptables
I've applied a rule in the iptables
(Ubuntu x64 18)
sudo iptables -t nat -A OUTPUT -p tcp --dport 64080 -d 172.31.132.86 -j DNAT --to-destination 149.154.167.50:80
sudo iptables -t nat -v -L OUTPUT ...
2
votes
2
answers
1k
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Routing IP addresses in Ubuntu 18.04
I have been scratching my head about this all day. Basically, I have several servers on a private network, each with a private IPv6 address assigned and a public IPv4 and IPv6 assigned. I want the ...
0
votes
1
answer
2k
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Policy Routing with NetPlan on TUN interfaces
I am trying to set up an OpenVPN server on Ubuntu 18.04 in AWS in routed mode, using a tun interface (not tap). The server sits in a public subnet, with an attached ENI in a private subnet.
All is ...
0
votes
1
answer
39
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3 -> 1 routing issue
I've had this working before, but I can't get it right on a new machine. I have the following setup on a ubuntu install as a router.
192.168.2.0/24 p34p1 wifi1 -------------|
192.168.1.0/24 p33p1 ...
1
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0
answers
520
views
LTSP fat clients not connecting to internet in proxy DHCP mode
My current setup is modem to router. Router(10.10.10.0/24) to virtual server via enp8s1. Virtual machine running pfsense as a DHCP server via enp3s0(a second nic in the server) a network 192.168.67.0/...
1
vote
1
answer
269
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ip neigh display a mac address at a coffee store
I am working at a coffee store and tried command ip
user@host:~$ ip neigh
192.168.1.1 dev wlp3s0 lladdr 5c:dd:70:96:80:52 REACHABLE
I am aware that 192.168.1.1 is the router address,
How about ...
0
votes
1
answer
456
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Automatic route deleting in a specific network
I'm on Ubuntu 18.04 and I try to learn more on netplan.
When I'm in school's network I need to access to the LAN but I don't want my internet traffic goes by their gateway. I can connect to network ...
0
votes
1
answer
562
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Correct /etc/networking/interfaces script for 4 ethernets with 1 bridge, two subnets and a wan interface
I can't seem to get the last NIC on my server working just right. I have an HP Proliant server with 4 NICs currently serving as my home router. Eth0 is my WAN interface, eth1 and eth2 are setup to ...
1
vote
2
answers
1k
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Netplan on Ubuntu 18.10 (Cosmic Cuttlefish): DHCP4 + static routes
I'm using fresh Ubuntu Server 18.10 (Cosmic) installation with netplan.
What I'm trying to achieve is to setup network interface via DHCP and add some static routes.
With static IP settings things ...
1
vote
1
answer
183
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Does Ubuntu 14.04 support advertisement of more specific routes?
I have an IPv6-only network where I am now trying to add a NAT64 gateway. The NAT64 is not on my default gateway because it's intended to use a different ISP than the default gateway.
The default ...
1
vote
1
answer
4k
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iptables setup for routing
I want to setup my ubuntu computer to route packets. Therefore I've read several tutorials which always had many rules to add to iptables.
I finally found out, that the only rule needed (given that ...
7
votes
3
answers
50k
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How to change default interface for internet?
I have a PC with Ubuntu server 18.04 installed on it and I'm trying to use this PC as a server. There are 2 interfaces involved here:
To provide Its internet, I am using an android smartphone that ...
1
vote
0
answers
117
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How can I improve this iptables
As a training, I'm trying to install a server with ESXi,
On this ESXi, I have a first ubuntu 16.04 VM that will be the firewall between WAN and LAN.
So the host machine IP is 192.168.1.25 and the ...
2
votes
1
answer
112
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What does "my.firewall" mean on linux routing table?
When I run the route command on shell, I get the following connections:
root@ct1000-1332:/opt/storage/dlogger# route
Kernel IP routing table
Destination Gateway Genmask Flags ...
0
votes
1
answer
2k
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Network is unreachable
I have one server using 192.168.1.2/24 and the other server using 192.168.2.2/24. They are connected on my router with separate adapters.
I tried ping test from my router, it worked.
However, when ...
0
votes
1
answer
1k
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Ubuntu & Netplan - Example of blackhole or unreachable routes
I have not found examples of how to configure Netplan in Ubuntu Bionic 18.04 with global blackhole/unreachable routes. So I'll put it here in case someone else runs into the same problem, has an ...
0
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0
answers
146
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domain name and subdomain pointing to default apache and webmin
I have recently setup Ubuntu Server 18.04 on an old but still decent laptop.
Have installed apache2, php, mysql etc. and webmin.
Have done the port forwarding in my router and when I access my ...
1
vote
1
answer
5k
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Multiple network interfaces with netplan
So in short, I have 3 network interface on my Ubuntu Server 18.04
ens160 - LAN 192.168.1.50/24 set by dhcp
ens192 - LAB 10.10.10.50/24 set by dhcp
ens224 - SAN 10.10.15.50/24 static ip.
They ...
0
votes
0
answers
85
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How to specify a static route among three interfaces
I have this setup:
10.5.128.150
Ubuntu Ubuntu eth2 <------> server (10.5.128.154)
client eth1 <----> eth1 ...
2
votes
1
answer
417
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ubuntu server not accepting connections from subnets
Yesterday I rebooted our kvm server (added more rams) and now it will not accept connections from our VPN subnet. The VPN is working just fine as we can connect to any other resource on the network ...