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Cannot use a secondary IP for outgoing traffic
Network routing issues on LinuxIPv6 works only after ping to routing boxKVM/Libvirt bridged/routed networking not working on newer guest kernelsIP address reuse on macvlan devicesRemote end of IPSec transport is 'permenantly glued' to loopback after some messing around with GRERoute traffic through private IP for only certain hosts - CentOS 6.6How to correctly set up routing on machine with 4 interfaces so that three of interfaces are on the same subnet?IPTables DNAT WAN interface to hosted VM fails but DNAT to WAN IP succeedsWhy do ping to internet don't work?Linux: Bridging two ethernet connections together to allow second host onto first network
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I have a server (Ubuntu 18.04) with multiple IP address in the same network device.
This is the ip a return:
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 06:9b:1c:00:00:2a brd ff:ff:ff:ff:ff:ff
inet 191.XXX.XXX.51/23 brd 191.XXX.XXX.255 scope global dynamic ens3
valid_lft 80087sec preferred_lft 80087sec
inet 179.XXX.XXX.0/32 scope global ens3
valid_lft forever preferred_lft forever
inet 179.XXX.XXX.1/32 scope global ens3
valid_lft forever preferred_lft forever
inet 179.XXX.XXX.2/32 scope global ens3
valid_lft forever preferred_lft forever
inet 179.XXX.XXX.3/32 scope global ens3
valid_lft forever preferred_lft forever
inet6 fe80::XXX:XXX:XXX:2a/64 scope link
valid_lft forever preferred_lft forever
And this is my route -n return:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 191.XXX.XXX.1 0.0.0.0 UG 100 0 0 ens3
191.XXX.XXX.0 0.0.0.0 255.255.254.0 U 0 0 0 ens3
191.XXX.XXX.1 0.0.0.0 255.255.255.255 UH 100 0 0 ens3
So I have a main public IP: 191.XXX.XXX.51 and 4 more secondary public IPs: 179.XXX.XXX.0-3
My final goal is to use my secondary IPs for outgoing connections, I think that I can achieve this using routing tables or iptables, but I don't know how.
For example:
If I ping google.com:
user@server:# ping google.com
PING google.com (216.58.202.142) 56(84) bytes of data.
64 bytes from gru06s29-in-f142.1e100.net (216.58.202.142): icmp_seq=1 ttl=57 time=1.01 ms
64 bytes from gru06s29-in-f142.1e100.net (216.58.202.142): icmp_seq=2 ttl=57 time=1.05 ms
64 bytes from gru06s29-in-f142.1e100.net (216.58.202.142): icmp_seq=3 ttl=57 time=0.965 ms
64 bytes from gru06s29-in-f142.1e100.net (216.58.202.142): icmp_seq=4 ttl=57 time=0.993 ms
^C
--- google.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3004ms
rtt min/avg/max/mdev = 0.965/1.005/1.055/0.050 ms
Everything works fine, but if I choose another IP to be the source of the ping:
ping -I 179.XXX.XXX.1 google.com
The ping has 100% packet loss.
The same happens with tinyproxy, if I configure to use the secondary IP as outgoing IP the connection just fails.
PS. The secondary IP works if I ping them from outside the server.
So how can I make the secondary IP useful to reach the Internet?
linux networking iptables proxy route
asked Apr 26 at 22:16
GuiGui
993
add a comment |
I have a server (Ubuntu 18.04) with multiple IP address in the same network device.
This is the ip a return:
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 06:9b:1c:00:00:2a brd ff:ff:ff:ff:ff:ff
inet 191.XXX.XXX.51/23 brd 191.XXX.XXX.255 scope global dynamic ens3
valid_lft 80087sec preferred_lft 80087sec
inet 179.XXX.XXX.0/32 scope global ens3
valid_lft forever preferred_lft forever
inet 179.XXX.XXX.1/32 scope global ens3
valid_lft forever preferred_lft forever
inet 179.XXX.XXX.2/32 scope global ens3
valid_lft forever preferred_lft forever
inet 179.XXX.XXX.3/32 scope global ens3
valid_lft forever preferred_lft forever
inet6 fe80::XXX:XXX:XXX:2a/64 scope link
valid_lft forever preferred_lft forever
And this is my route -n return:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 191.XXX.XXX.1 0.0.0.0 UG 100 0 0 ens3
191.XXX.XXX.0 0.0.0.0 255.255.254.0 U 0 0 0 ens3
191.XXX.XXX.1 0.0.0.0 255.255.255.255 UH 100 0 0 ens3
So I have a main public IP: 191.XXX.XXX.51 and 4 more secondary public IPs: 179.XXX.XXX.0-3
My final goal is to use my secondary IPs for outgoing connections, I think that I can achieve this using routing tables or iptables, but I don't know how.
For example:
If I ping google.com:
user@server:# ping google.com
PING google.com (216.58.202.142) 56(84) bytes of data.
64 bytes from gru06s29-in-f142.1e100.net (216.58.202.142): icmp_seq=1 ttl=57 time=1.01 ms
64 bytes from gru06s29-in-f142.1e100.net (216.58.202.142): icmp_seq=2 ttl=57 time=1.05 ms
64 bytes from gru06s29-in-f142.1e100.net (216.58.202.142): icmp_seq=3 ttl=57 time=0.965 ms
64 bytes from gru06s29-in-f142.1e100.net (216.58.202.142): icmp_seq=4 ttl=57 time=0.993 ms
^C
--- google.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3004ms
rtt min/avg/max/mdev = 0.965/1.005/1.055/0.050 ms
Everything works fine, but if I choose another IP to be the source of the ping:
ping -I 179.XXX.XXX.1 google.com
The ping has 100% packet loss.
The same happens with tinyproxy, if I configure to use the secondary IP as outgoing IP the connection just fails.
PS. The secondary IP works if I ping them from outside the server.
So how can I make the secondary IP useful to reach the Internet?
linux networking iptables proxy route
asked Apr 26 at 22:16
GuiGui
993
add a comment |
I have a server (Ubuntu 18.04) with multiple IP address in the same network device.
This is the ip a return:
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 06:9b:1c:00:00:2a brd ff:ff:ff:ff:ff:ff
inet 191.XXX.XXX.51/23 brd 191.XXX.XXX.255 scope global dynamic ens3
valid_lft 80087sec preferred_lft 80087sec
inet 179.XXX.XXX.0/32 scope global ens3
valid_lft forever preferred_lft forever
inet 179.XXX.XXX.1/32 scope global ens3
valid_lft forever preferred_lft forever
inet 179.XXX.XXX.2/32 scope global ens3
valid_lft forever preferred_lft forever
inet 179.XXX.XXX.3/32 scope global ens3
valid_lft forever preferred_lft forever
inet6 fe80::XXX:XXX:XXX:2a/64 scope link
valid_lft forever preferred_lft forever
And this is my route -n return:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 191.XXX.XXX.1 0.0.0.0 UG 100 0 0 ens3
191.XXX.XXX.0 0.0.0.0 255.255.254.0 U 0 0 0 ens3
191.XXX.XXX.1 0.0.0.0 255.255.255.255 UH 100 0 0 ens3
So I have a main public IP: 191.XXX.XXX.51 and 4 more secondary public IPs: 179.XXX.XXX.0-3
My final goal is to use my secondary IPs for outgoing connections, I think that I can achieve this using routing tables or iptables, but I don't know how.
For example:
If I ping google.com:
user@server:# ping google.com
PING google.com (216.58.202.142) 56(84) bytes of data.
64 bytes from gru06s29-in-f142.1e100.net (216.58.202.142): icmp_seq=1 ttl=57 time=1.01 ms
64 bytes from gru06s29-in-f142.1e100.net (216.58.202.142): icmp_seq=2 ttl=57 time=1.05 ms
64 bytes from gru06s29-in-f142.1e100.net (216.58.202.142): icmp_seq=3 ttl=57 time=0.965 ms
64 bytes from gru06s29-in-f142.1e100.net (216.58.202.142): icmp_seq=4 ttl=57 time=0.993 ms
^C
--- google.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3004ms
rtt min/avg/max/mdev = 0.965/1.005/1.055/0.050 ms
Everything works fine, but if I choose another IP to be the source of the ping:
ping -I 179.XXX.XXX.1 google.com
The ping has 100% packet loss.
The same happens with tinyproxy, if I configure to use the secondary IP as outgoing IP the connection just fails.
PS. The secondary IP works if I ping them from outside the server.
So how can I make the secondary IP useful to reach the Internet?
linux networking iptables proxy route
asked Apr 26 at 22:16
GuiGui
993
I have a server (Ubuntu 18.04) with multiple IP address in the same network device.
This is the ip a return:
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 06:9b:1c:00:00:2a brd ff:ff:ff:ff:ff:ff
inet 191.XXX.XXX.51/23 brd 191.XXX.XXX.255 scope global dynamic ens3
valid_lft 80087sec preferred_lft 80087sec
inet 179.XXX.XXX.0/32 scope global ens3
valid_lft forever preferred_lft forever
inet 179.XXX.XXX.1/32 scope global ens3
valid_lft forever preferred_lft forever
inet 179.XXX.XXX.2/32 scope global ens3
valid_lft forever preferred_lft forever
inet 179.XXX.XXX.3/32 scope global ens3
valid_lft forever preferred_lft forever
inet6 fe80::XXX:XXX:XXX:2a/64 scope link
valid_lft forever preferred_lft forever
And this is my route -n return:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 191.XXX.XXX.1 0.0.0.0 UG 100 0 0 ens3
191.XXX.XXX.0 0.0.0.0 255.255.254.0 U 0 0 0 ens3
191.XXX.XXX.1 0.0.0.0 255.255.255.255 UH 100 0 0 ens3
So I have a main public IP: 191.XXX.XXX.51 and 4 more secondary public IPs: 179.XXX.XXX.0-3
My final goal is to use my secondary IPs for outgoing connections, I think that I can achieve this using routing tables or iptables, but I don't know how.
For example:
If I ping google.com:
user@server:# ping google.com
PING google.com (216.58.202.142) 56(84) bytes of data.
64 bytes from gru06s29-in-f142.1e100.net (216.58.202.142): icmp_seq=1 ttl=57 time=1.01 ms
64 bytes from gru06s29-in-f142.1e100.net (216.58.202.142): icmp_seq=2 ttl=57 time=1.05 ms
64 bytes from gru06s29-in-f142.1e100.net (216.58.202.142): icmp_seq=3 ttl=57 time=0.965 ms
64 bytes from gru06s29-in-f142.1e100.net (216.58.202.142): icmp_seq=4 ttl=57 time=0.993 ms
^C
--- google.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3004ms
rtt min/avg/max/mdev = 0.965/1.005/1.055/0.050 ms
Everything works fine, but if I choose another IP to be the source of the ping:
ping -I 179.XXX.XXX.1 google.com
The ping has 100% packet loss.
The same happens with tinyproxy, if I configure to use the secondary IP as outgoing IP the connection just fails.
PS. The secondary IP works if I ping them from outside the server.
So how can I make the secondary IP useful to reach the Internet?
linux networking iptables proxy route
linux networking iptables proxy route
asked Apr 26 at 22:16
GuiGui
993
asked Apr 26 at 22:16
GuiGui
993
asked Apr 26 at 22:16
GuiGui
993
asked Apr 26 at 22:16
GuiGui
993
asked Apr 26 at 22:16
GuiGui
993
993
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
It's pretty simple. You just overwrite the default route with src attribute. This value will be used as source address for outgoing connections.
ip route replace 0/0 via <gw-ip> src <sec-ip-addr>
answered Apr 27 at 18:02
Anton DanilovAnton Danilov
70135
When I do that I can't ping anymore any site
– Gui
May 1 at 19:38
Usage of these secondary addresses requires the setup on the remote side of your connection. These secondary addresses can be assigned in the same broadcast domain or can be routed trought your primary address. Have your ISP provide the information about it?
– Anton Danilov
May 1 at 20:13
I just resolve my problem. The problem is the way I'm configuring these secondary IPs. I'm using the ip addr command, but now I use the netplan in Ubuntu 18.04 and everything works fine. Thanks
– Gui
May 1 at 20:40
Hm.. It's very curious. Can you paste the current state of ip addresses and routing table to help to figure out what's different? If you can, useipcommand, notroute.
– Anton Danilov
May 2 at 1:50
add a comment |
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1 Answer
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1 Answer
1
active
oldest
votes
active
oldest
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active
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votes
It's pretty simple. You just overwrite the default route with src attribute. This value will be used as source address for outgoing connections.
ip route replace 0/0 via <gw-ip> src <sec-ip-addr>
answered Apr 27 at 18:02
Anton DanilovAnton Danilov
70135
When I do that I can't ping anymore any site
– Gui
May 1 at 19:38
Usage of these secondary addresses requires the setup on the remote side of your connection. These secondary addresses can be assigned in the same broadcast domain or can be routed trought your primary address. Have your ISP provide the information about it?
– Anton Danilov
May 1 at 20:13
I just resolve my problem. The problem is the way I'm configuring these secondary IPs. I'm using the ip addr command, but now I use the netplan in Ubuntu 18.04 and everything works fine. Thanks
– Gui
May 1 at 20:40
Hm.. It's very curious. Can you paste the current state of ip addresses and routing table to help to figure out what's different? If you can, useipcommand, notroute.
– Anton Danilov
May 2 at 1:50
add a comment |
It's pretty simple. You just overwrite the default route with src attribute. This value will be used as source address for outgoing connections.
ip route replace 0/0 via <gw-ip> src <sec-ip-addr>
answered Apr 27 at 18:02
Anton DanilovAnton Danilov
70135
When I do that I can't ping anymore any site
– Gui
May 1 at 19:38
Usage of these secondary addresses requires the setup on the remote side of your connection. These secondary addresses can be assigned in the same broadcast domain or can be routed trought your primary address. Have your ISP provide the information about it?
– Anton Danilov
May 1 at 20:13
I just resolve my problem. The problem is the way I'm configuring these secondary IPs. I'm using the ip addr command, but now I use the netplan in Ubuntu 18.04 and everything works fine. Thanks
– Gui
May 1 at 20:40
Hm.. It's very curious. Can you paste the current state of ip addresses and routing table to help to figure out what's different? If you can, useipcommand, notroute.
– Anton Danilov
May 2 at 1:50
add a comment |
It's pretty simple. You just overwrite the default route with src attribute. This value will be used as source address for outgoing connections.
ip route replace 0/0 via <gw-ip> src <sec-ip-addr>
answered Apr 27 at 18:02
Anton DanilovAnton Danilov
70135
It's pretty simple. You just overwrite the default route with src attribute. This value will be used as source address for outgoing connections.
ip route replace 0/0 via <gw-ip> src <sec-ip-addr>
answered Apr 27 at 18:02
Anton DanilovAnton Danilov
70135
answered Apr 27 at 18:02
Anton DanilovAnton Danilov
70135
answered Apr 27 at 18:02
Anton DanilovAnton Danilov
70135
answered Apr 27 at 18:02
Anton DanilovAnton Danilov
70135
70135
When I do that I can't ping anymore any site
– Gui
May 1 at 19:38
Usage of these secondary addresses requires the setup on the remote side of your connection. These secondary addresses can be assigned in the same broadcast domain or can be routed trought your primary address. Have your ISP provide the information about it?
– Anton Danilov
May 1 at 20:13
I just resolve my problem. The problem is the way I'm configuring these secondary IPs. I'm using the ip addr command, but now I use the netplan in Ubuntu 18.04 and everything works fine. Thanks
– Gui
May 1 at 20:40
Hm.. It's very curious. Can you paste the current state of ip addresses and routing table to help to figure out what's different? If you can, useipcommand, notroute.
– Anton Danilov
May 2 at 1:50
add a comment |
When I do that I can't ping anymore any site
– Gui
May 1 at 19:38
Usage of these secondary addresses requires the setup on the remote side of your connection. These secondary addresses can be assigned in the same broadcast domain or can be routed trought your primary address. Have your ISP provide the information about it?
– Anton Danilov
May 1 at 20:13
I just resolve my problem. The problem is the way I'm configuring these secondary IPs. I'm using the ip addr command, but now I use the netplan in Ubuntu 18.04 and everything works fine. Thanks
– Gui
May 1 at 20:40
Hm.. It's very curious. Can you paste the current state of ip addresses and routing table to help to figure out what's different? If you can, useipcommand, notroute.
– Anton Danilov
May 2 at 1:50
When I do that I can't ping anymore any site
– Gui
May 1 at 19:38
When I do that I can't ping anymore any site
– Gui
May 1 at 19:38
Usage of these secondary addresses requires the setup on the remote side of your connection. These secondary addresses can be assigned in the same broadcast domain or can be routed trought your primary address. Have your ISP provide the information about it?
– Anton Danilov
May 1 at 20:13
Usage of these secondary addresses requires the setup on the remote side of your connection. These secondary addresses can be assigned in the same broadcast domain or can be routed trought your primary address. Have your ISP provide the information about it?
– Anton Danilov
May 1 at 20:13
I just resolve my problem. The problem is the way I'm configuring these secondary IPs. I'm using the ip addr command, but now I use the netplan in Ubuntu 18.04 and everything works fine. Thanks
– Gui
May 1 at 20:40
I just resolve my problem. The problem is the way I'm configuring these secondary IPs. I'm using the ip addr command, but now I use the netplan in Ubuntu 18.04 and everything works fine. Thanks
– Gui
May 1 at 20:40
Hm.. It's very curious. Can you paste the current state of ip addresses and routing table to help to figure out what's different? If you can, use
ip command, not route.– Anton Danilov
May 2 at 1:50
Hm.. It's very curious. Can you paste the current state of ip addresses and routing table to help to figure out what's different? If you can, use
ip command, not route.– Anton Danilov
May 2 at 1:50
add a comment |
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