Networking problems: 2 interfaces with 2 gateways, seperated routing tables not working as expected
Clash Royale CLAN TAG#URR8PPP
I have a server, running Ubuntu 16.04.5 LTS with 2 IP addresses on 2 nics:
eth0: 192.168.1.5/24, gw 192.168.1.1
eth1: 192.168.2.5/24, gw 192.168.2.1
As I searched here and on Google, in order to make this work I created a second routing table for eth1, which I added the following:
/etc/iproute2/rt_tables:
1 rt2
/etc/network/interfaces:
post-up ip route add 192.168.2.0/24 dev eth1 src 192.168.2.5 table rt2
post-up ip route add default via 192.168.2.1 dev eth1 table rt2
post-up ip rule add from 192.168.2.5/32 table rt2
post-up ip rule add to 192.168.2.5/32 table rt2
I have a pc, which is also connected to 192.168.2.0/24, it has the IP 192.168.2.7.
The problem now is, I cannot reach the server with 192.168.1.5 from my pc.
I ran tcpdump on the server and I know the packet is coming in, but nothing is sent back and no packet is dropped.
I need that 192.168.1.5 is also reachable from my pc.
Update 1:
I made a mistake in posting the config here, I updated the last 2 post-up definitions, it should be rule instead of route.(Thx, A.B.)
Secondly, I changed the last sentence, as it was a bit misunderstanding.
linux ubuntu networking routing
asked Feb 6 at 10:23
ashash
11
add a comment |
I have a server, running Ubuntu 16.04.5 LTS with 2 IP addresses on 2 nics:
eth0: 192.168.1.5/24, gw 192.168.1.1
eth1: 192.168.2.5/24, gw 192.168.2.1
As I searched here and on Google, in order to make this work I created a second routing table for eth1, which I added the following:
/etc/iproute2/rt_tables:
1 rt2
/etc/network/interfaces:
post-up ip route add 192.168.2.0/24 dev eth1 src 192.168.2.5 table rt2
post-up ip route add default via 192.168.2.1 dev eth1 table rt2
post-up ip rule add from 192.168.2.5/32 table rt2
post-up ip rule add to 192.168.2.5/32 table rt2
I have a pc, which is also connected to 192.168.2.0/24, it has the IP 192.168.2.7.
The problem now is, I cannot reach the server with 192.168.1.5 from my pc.
I ran tcpdump on the server and I know the packet is coming in, but nothing is sent back and no packet is dropped.
I need that 192.168.1.5 is also reachable from my pc.
Update 1:
I made a mistake in posting the config here, I updated the last 2 post-up definitions, it should be rule instead of route.(Thx, A.B.)
Secondly, I changed the last sentence, as it was a bit misunderstanding.
linux ubuntu networking routing
asked Feb 6 at 10:23
ashash
11
1st clarification: "via my pc": is the intention that your pc is a gateway (ie a router) between those two networks for other systems on 192.168.2.0/24 ? 2nd clarification: adding a routing table has no effect without adding a rule telling to use this routing table. I see noip ruleanywhere
– A.B
Feb 6 at 18:26
No my pc shouldn't be a gateway, the pc has 192.168.2.7, the gateway is 192.168.2.1.
– ash
Feb 7 at 9:53
add a comment |
I have a server, running Ubuntu 16.04.5 LTS with 2 IP addresses on 2 nics:
eth0: 192.168.1.5/24, gw 192.168.1.1
eth1: 192.168.2.5/24, gw 192.168.2.1
As I searched here and on Google, in order to make this work I created a second routing table for eth1, which I added the following:
/etc/iproute2/rt_tables:
1 rt2
/etc/network/interfaces:
post-up ip route add 192.168.2.0/24 dev eth1 src 192.168.2.5 table rt2
post-up ip route add default via 192.168.2.1 dev eth1 table rt2
post-up ip rule add from 192.168.2.5/32 table rt2
post-up ip rule add to 192.168.2.5/32 table rt2
I have a pc, which is also connected to 192.168.2.0/24, it has the IP 192.168.2.7.
The problem now is, I cannot reach the server with 192.168.1.5 from my pc.
I ran tcpdump on the server and I know the packet is coming in, but nothing is sent back and no packet is dropped.
I need that 192.168.1.5 is also reachable from my pc.
Update 1:
I made a mistake in posting the config here, I updated the last 2 post-up definitions, it should be rule instead of route.(Thx, A.B.)
Secondly, I changed the last sentence, as it was a bit misunderstanding.
linux ubuntu networking routing
asked Feb 6 at 10:23
ashash
11
I have a server, running Ubuntu 16.04.5 LTS with 2 IP addresses on 2 nics:
eth0: 192.168.1.5/24, gw 192.168.1.1
eth1: 192.168.2.5/24, gw 192.168.2.1
As I searched here and on Google, in order to make this work I created a second routing table for eth1, which I added the following:
/etc/iproute2/rt_tables:
1 rt2
/etc/network/interfaces:
post-up ip route add 192.168.2.0/24 dev eth1 src 192.168.2.5 table rt2
post-up ip route add default via 192.168.2.1 dev eth1 table rt2
post-up ip rule add from 192.168.2.5/32 table rt2
post-up ip rule add to 192.168.2.5/32 table rt2
I have a pc, which is also connected to 192.168.2.0/24, it has the IP 192.168.2.7.
The problem now is, I cannot reach the server with 192.168.1.5 from my pc.
I ran tcpdump on the server and I know the packet is coming in, but nothing is sent back and no packet is dropped.
I need that 192.168.1.5 is also reachable from my pc.
Update 1:
I made a mistake in posting the config here, I updated the last 2 post-up definitions, it should be rule instead of route.(Thx, A.B.)
Secondly, I changed the last sentence, as it was a bit misunderstanding.
linux ubuntu networking routing
linux ubuntu networking routing
asked Feb 6 at 10:23
ashash
11
asked Feb 6 at 10:23
ashash
11
edited Feb 7 at 10:11
ash
asked Feb 6 at 10:23
ashash
11
asked Feb 6 at 10:23
ashash
11
asked Feb 6 at 10:23
ashash
11
11
1st clarification: "via my pc": is the intention that your pc is a gateway (ie a router) between those two networks for other systems on 192.168.2.0/24 ? 2nd clarification: adding a routing table has no effect without adding a rule telling to use this routing table. I see noip ruleanywhere
– A.B
Feb 6 at 18:26
No my pc shouldn't be a gateway, the pc has 192.168.2.7, the gateway is 192.168.2.1.
– ash
Feb 7 at 9:53
add a comment |
1st clarification: "via my pc": is the intention that your pc is a gateway (ie a router) between those two networks for other systems on 192.168.2.0/24 ? 2nd clarification: adding a routing table has no effect without adding a rule telling to use this routing table. I see noip ruleanywhere
– A.B
Feb 6 at 18:26
No my pc shouldn't be a gateway, the pc has 192.168.2.7, the gateway is 192.168.2.1.
– ash
Feb 7 at 9:53
1st clarification: "via my pc": is the intention that your pc is a gateway (ie a router) between those two networks for other systems on 192.168.2.0/24 ? 2nd clarification: adding a routing table has no effect without adding a rule telling to use this routing table. I see no
ip rule anywhere– A.B
Feb 6 at 18:26
1st clarification: "via my pc": is the intention that your pc is a gateway (ie a router) between those two networks for other systems on 192.168.2.0/24 ? 2nd clarification: adding a routing table has no effect without adding a rule telling to use this routing table. I see no
ip rule anywhere– A.B
Feb 6 at 18:26
No my pc shouldn't be a gateway, the pc has 192.168.2.7, the gateway is 192.168.2.1.
– ash
Feb 7 at 9:53
No my pc shouldn't be a gateway, the pc has 192.168.2.7, the gateway is 192.168.2.1.
– ash
Feb 7 at 9:53
add a comment |
0
active
oldest
votes
Your Answer
StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "106"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);
else
createEditor();
);
function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);
);
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f499012%2fnetworking-problems-2-interfaces-with-2-gateways-seperated-routing-tables-not%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
0
active
oldest
votes
0
active
oldest
votes
active
oldest
votes
active
oldest
votes
Thanks for contributing an answer to Unix & Linux Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f499012%2fnetworking-problems-2-interfaces-with-2-gateways-seperated-routing-tables-not%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
1st clarification: "via my pc": is the intention that your pc is a gateway (ie a router) between those two networks for other systems on 192.168.2.0/24 ? 2nd clarification: adding a routing table has no effect without adding a rule telling to use this routing table. I see no
ip ruleanywhere– A.B
Feb 6 at 18:26
No my pc shouldn't be a gateway, the pc has 192.168.2.7, the gateway is 192.168.2.1.
– ash
Feb 7 at 9:53