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How can I access a virtual machine running on a remote machine directly?


Which concept does ssh “proxy jump” belong to: proxy, port forwarding or something else?How does Linux handle 2 identical destinations in its routing table?iptables routingHow can I connect to a local computer behind a router with the router's IP address?OpenVPN and routing problem on OpenWRTip rule not acting on fwmarkrouting problem - arpAllow KVM guests on virsh virtual network to access the real internal networklinux policy routing; Sending arp for off network IPs instead of sending traffic to gatewayiptables - 2 Internetprovider - routingConfiguring Linux Mint as a Gateway






.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;








2















  • My local Lubuntu's wifi IP address is 192.168.1.97


  • A remote Lubuntu's wifi IP address is 192.168.1.198,


  • A virtual machine running on the remote Lubuntu has IP address 192.168.122.169.


I can access the virtual machine from my local machine, indirectly by ssh to the remote by ssh t@192.168.1.198, and then ssh to the virtual machine by ssh t@192.168.122.169.



I can access the local machine from the virtual machine, directly by ssh t@192.168.1.97.



Because of the routing table on my local Lubuntu, I can't access the virtual machine directly from my local machine



$ ssh t@192.168.122.169
ssh: connect to host 192.168.122.169 port 22: No route to host


Can I access the virtual machine directly from my local Lubuntu?



  • Do I have to modify the routing tables of my local Lubuntu and the remote Lubuntu?


  • Can NAT help?


Thanks.



The routing table on the local Lubuntu is



$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 600 0 0 wlx801f02b5c389
172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0
192.168.1.0 0.0.0.0 255.255.255.0 U 600 0 0 wlx801f02b5c389
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0


The routing table on the remote Lubuntu is



$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 600 0 0 wlp5s0
192.168.1.0 0.0.0.0 255.255.255.0 U 600 0 0 wlp5s0
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0


The routing table on the virtual machine is:



$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.122.1 0.0.0.0 UG 0 0 0 ens3
169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 ens3
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 ens3









share|improve this question



















  • 1





    IMHO this is a question about networking rather than about Unix or Linux. You either bridge the network interface on the VM (so it shares the same address range as the host) or forward across the NAT. See for example Introduction to Networking Modes in particular the "VM←Net/LAN" column of Table 6.1

    – steeldriver
    Mar 28 at 12:51












  • I am using kvm.

    – Tim
    Mar 28 at 12:54











  • AFAIK the principle is the same regardless of the particular VM platform - if you believe that is not the case, please edit your question to make that clear.

    – steeldriver
    Mar 28 at 12:56

















2















  • My local Lubuntu's wifi IP address is 192.168.1.97


  • A remote Lubuntu's wifi IP address is 192.168.1.198,


  • A virtual machine running on the remote Lubuntu has IP address 192.168.122.169.


I can access the virtual machine from my local machine, indirectly by ssh to the remote by ssh t@192.168.1.198, and then ssh to the virtual machine by ssh t@192.168.122.169.



I can access the local machine from the virtual machine, directly by ssh t@192.168.1.97.



Because of the routing table on my local Lubuntu, I can't access the virtual machine directly from my local machine



$ ssh t@192.168.122.169
ssh: connect to host 192.168.122.169 port 22: No route to host


Can I access the virtual machine directly from my local Lubuntu?



  • Do I have to modify the routing tables of my local Lubuntu and the remote Lubuntu?


  • Can NAT help?


Thanks.



The routing table on the local Lubuntu is



$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 600 0 0 wlx801f02b5c389
172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0
192.168.1.0 0.0.0.0 255.255.255.0 U 600 0 0 wlx801f02b5c389
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0


The routing table on the remote Lubuntu is



$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 600 0 0 wlp5s0
192.168.1.0 0.0.0.0 255.255.255.0 U 600 0 0 wlp5s0
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0


The routing table on the virtual machine is:



$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.122.1 0.0.0.0 UG 0 0 0 ens3
169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 ens3
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 ens3









share|improve this question



















  • 1





    IMHO this is a question about networking rather than about Unix or Linux. You either bridge the network interface on the VM (so it shares the same address range as the host) or forward across the NAT. See for example Introduction to Networking Modes in particular the "VM←Net/LAN" column of Table 6.1

    – steeldriver
    Mar 28 at 12:51












  • I am using kvm.

    – Tim
    Mar 28 at 12:54











  • AFAIK the principle is the same regardless of the particular VM platform - if you believe that is not the case, please edit your question to make that clear.

    – steeldriver
    Mar 28 at 12:56













2












2








2








  • My local Lubuntu's wifi IP address is 192.168.1.97


  • A remote Lubuntu's wifi IP address is 192.168.1.198,


  • A virtual machine running on the remote Lubuntu has IP address 192.168.122.169.


I can access the virtual machine from my local machine, indirectly by ssh to the remote by ssh t@192.168.1.198, and then ssh to the virtual machine by ssh t@192.168.122.169.



I can access the local machine from the virtual machine, directly by ssh t@192.168.1.97.



Because of the routing table on my local Lubuntu, I can't access the virtual machine directly from my local machine



$ ssh t@192.168.122.169
ssh: connect to host 192.168.122.169 port 22: No route to host


Can I access the virtual machine directly from my local Lubuntu?



  • Do I have to modify the routing tables of my local Lubuntu and the remote Lubuntu?


  • Can NAT help?


Thanks.



The routing table on the local Lubuntu is



$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 600 0 0 wlx801f02b5c389
172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0
192.168.1.0 0.0.0.0 255.255.255.0 U 600 0 0 wlx801f02b5c389
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0


The routing table on the remote Lubuntu is



$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 600 0 0 wlp5s0
192.168.1.0 0.0.0.0 255.255.255.0 U 600 0 0 wlp5s0
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0


The routing table on the virtual machine is:



$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.122.1 0.0.0.0 UG 0 0 0 ens3
169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 ens3
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 ens3









share|improve this question
















  • My local Lubuntu's wifi IP address is 192.168.1.97


  • A remote Lubuntu's wifi IP address is 192.168.1.198,


  • A virtual machine running on the remote Lubuntu has IP address 192.168.122.169.


I can access the virtual machine from my local machine, indirectly by ssh to the remote by ssh t@192.168.1.198, and then ssh to the virtual machine by ssh t@192.168.122.169.



I can access the local machine from the virtual machine, directly by ssh t@192.168.1.97.



Because of the routing table on my local Lubuntu, I can't access the virtual machine directly from my local machine



$ ssh t@192.168.122.169
ssh: connect to host 192.168.122.169 port 22: No route to host


Can I access the virtual machine directly from my local Lubuntu?



  • Do I have to modify the routing tables of my local Lubuntu and the remote Lubuntu?


  • Can NAT help?


Thanks.



The routing table on the local Lubuntu is



$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 600 0 0 wlx801f02b5c389
172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0
192.168.1.0 0.0.0.0 255.255.255.0 U 600 0 0 wlx801f02b5c389
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0


The routing table on the remote Lubuntu is



$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 600 0 0 wlp5s0
192.168.1.0 0.0.0.0 255.255.255.0 U 600 0 0 wlp5s0
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0


The routing table on the virtual machine is:



$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.122.1 0.0.0.0 UG 0 0 0 ens3
169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 ens3
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 ens3






routing nat






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Mar 28 at 12:05









GAD3R

28.1k1958114




28.1k1958114










asked Mar 28 at 11:57









TimTim

28.5k79269491




28.5k79269491







  • 1





    IMHO this is a question about networking rather than about Unix or Linux. You either bridge the network interface on the VM (so it shares the same address range as the host) or forward across the NAT. See for example Introduction to Networking Modes in particular the "VM←Net/LAN" column of Table 6.1

    – steeldriver
    Mar 28 at 12:51












  • I am using kvm.

    – Tim
    Mar 28 at 12:54











  • AFAIK the principle is the same regardless of the particular VM platform - if you believe that is not the case, please edit your question to make that clear.

    – steeldriver
    Mar 28 at 12:56












  • 1





    IMHO this is a question about networking rather than about Unix or Linux. You either bridge the network interface on the VM (so it shares the same address range as the host) or forward across the NAT. See for example Introduction to Networking Modes in particular the "VM←Net/LAN" column of Table 6.1

    – steeldriver
    Mar 28 at 12:51












  • I am using kvm.

    – Tim
    Mar 28 at 12:54











  • AFAIK the principle is the same regardless of the particular VM platform - if you believe that is not the case, please edit your question to make that clear.

    – steeldriver
    Mar 28 at 12:56







1




1





IMHO this is a question about networking rather than about Unix or Linux. You either bridge the network interface on the VM (so it shares the same address range as the host) or forward across the NAT. See for example Introduction to Networking Modes in particular the "VM←Net/LAN" column of Table 6.1

– steeldriver
Mar 28 at 12:51






IMHO this is a question about networking rather than about Unix or Linux. You either bridge the network interface on the VM (so it shares the same address range as the host) or forward across the NAT. See for example Introduction to Networking Modes in particular the "VM←Net/LAN" column of Table 6.1

– steeldriver
Mar 28 at 12:51














I am using kvm.

– Tim
Mar 28 at 12:54





I am using kvm.

– Tim
Mar 28 at 12:54













AFAIK the principle is the same regardless of the particular VM platform - if you believe that is not the case, please edit your question to make that clear.

– steeldriver
Mar 28 at 12:56





AFAIK the principle is the same regardless of the particular VM platform - if you believe that is not the case, please edit your question to make that clear.

– steeldriver
Mar 28 at 12:56










1 Answer
1






active

oldest

votes


















2














Use ProxyJump or ProxyCommand.



Add this to your ~/.ssh/config:



Host vmhost
User t
Hostname 192.168.1.198

Host vm
Hostname 192.168.122.169
User t
ProxyJump vmhost


or for older versions of ssh instead ProxyJump vmhost:



ProxyCommand ssh -q -W 192.168.122.169:22 vmhost


Connect using:



ssh vm





share|improve this answer

























  • Thanks. Is there a solution which is no ssh specific?

    – Tim
    Mar 28 at 12:35











  • This should work for scp and ssh. But for general routing, you somehow need to setup a proxy on the vm host.

    – RoVo
    Mar 28 at 12:36











  • Thanks. How do you setup a proxy on the vm host?

    – Tim
    Mar 28 at 12:40











  • Sorry, don't know how to do it. Maybe network bridge is enough. Might be worth a second question.

    – RoVo
    Mar 28 at 12:48











  • Is the way in your reply called SSH local port forwarding, or something else?

    – Tim
    Mar 28 at 12:50











Your Answer








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1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes









2














Use ProxyJump or ProxyCommand.



Add this to your ~/.ssh/config:



Host vmhost
User t
Hostname 192.168.1.198

Host vm
Hostname 192.168.122.169
User t
ProxyJump vmhost


or for older versions of ssh instead ProxyJump vmhost:



ProxyCommand ssh -q -W 192.168.122.169:22 vmhost


Connect using:



ssh vm





share|improve this answer

























  • Thanks. Is there a solution which is no ssh specific?

    – Tim
    Mar 28 at 12:35











  • This should work for scp and ssh. But for general routing, you somehow need to setup a proxy on the vm host.

    – RoVo
    Mar 28 at 12:36











  • Thanks. How do you setup a proxy on the vm host?

    – Tim
    Mar 28 at 12:40











  • Sorry, don't know how to do it. Maybe network bridge is enough. Might be worth a second question.

    – RoVo
    Mar 28 at 12:48











  • Is the way in your reply called SSH local port forwarding, or something else?

    – Tim
    Mar 28 at 12:50















2














Use ProxyJump or ProxyCommand.



Add this to your ~/.ssh/config:



Host vmhost
User t
Hostname 192.168.1.198

Host vm
Hostname 192.168.122.169
User t
ProxyJump vmhost


or for older versions of ssh instead ProxyJump vmhost:



ProxyCommand ssh -q -W 192.168.122.169:22 vmhost


Connect using:



ssh vm





share|improve this answer

























  • Thanks. Is there a solution which is no ssh specific?

    – Tim
    Mar 28 at 12:35











  • This should work for scp and ssh. But for general routing, you somehow need to setup a proxy on the vm host.

    – RoVo
    Mar 28 at 12:36











  • Thanks. How do you setup a proxy on the vm host?

    – Tim
    Mar 28 at 12:40











  • Sorry, don't know how to do it. Maybe network bridge is enough. Might be worth a second question.

    – RoVo
    Mar 28 at 12:48











  • Is the way in your reply called SSH local port forwarding, or something else?

    – Tim
    Mar 28 at 12:50













2












2








2







Use ProxyJump or ProxyCommand.



Add this to your ~/.ssh/config:



Host vmhost
User t
Hostname 192.168.1.198

Host vm
Hostname 192.168.122.169
User t
ProxyJump vmhost


or for older versions of ssh instead ProxyJump vmhost:



ProxyCommand ssh -q -W 192.168.122.169:22 vmhost


Connect using:



ssh vm





share|improve this answer















Use ProxyJump or ProxyCommand.



Add this to your ~/.ssh/config:



Host vmhost
User t
Hostname 192.168.1.198

Host vm
Hostname 192.168.122.169
User t
ProxyJump vmhost


or for older versions of ssh instead ProxyJump vmhost:



ProxyCommand ssh -q -W 192.168.122.169:22 vmhost


Connect using:



ssh vm






share|improve this answer














share|improve this answer



share|improve this answer








edited Mar 28 at 12:35

























answered Mar 28 at 12:33









RoVoRoVo

3,522317




3,522317












  • Thanks. Is there a solution which is no ssh specific?

    – Tim
    Mar 28 at 12:35











  • This should work for scp and ssh. But for general routing, you somehow need to setup a proxy on the vm host.

    – RoVo
    Mar 28 at 12:36











  • Thanks. How do you setup a proxy on the vm host?

    – Tim
    Mar 28 at 12:40











  • Sorry, don't know how to do it. Maybe network bridge is enough. Might be worth a second question.

    – RoVo
    Mar 28 at 12:48











  • Is the way in your reply called SSH local port forwarding, or something else?

    – Tim
    Mar 28 at 12:50

















  • Thanks. Is there a solution which is no ssh specific?

    – Tim
    Mar 28 at 12:35











  • This should work for scp and ssh. But for general routing, you somehow need to setup a proxy on the vm host.

    – RoVo
    Mar 28 at 12:36











  • Thanks. How do you setup a proxy on the vm host?

    – Tim
    Mar 28 at 12:40











  • Sorry, don't know how to do it. Maybe network bridge is enough. Might be worth a second question.

    – RoVo
    Mar 28 at 12:48











  • Is the way in your reply called SSH local port forwarding, or something else?

    – Tim
    Mar 28 at 12:50
















Thanks. Is there a solution which is no ssh specific?

– Tim
Mar 28 at 12:35





Thanks. Is there a solution which is no ssh specific?

– Tim
Mar 28 at 12:35













This should work for scp and ssh. But for general routing, you somehow need to setup a proxy on the vm host.

– RoVo
Mar 28 at 12:36





This should work for scp and ssh. But for general routing, you somehow need to setup a proxy on the vm host.

– RoVo
Mar 28 at 12:36













Thanks. How do you setup a proxy on the vm host?

– Tim
Mar 28 at 12:40





Thanks. How do you setup a proxy on the vm host?

– Tim
Mar 28 at 12:40













Sorry, don't know how to do it. Maybe network bridge is enough. Might be worth a second question.

– RoVo
Mar 28 at 12:48





Sorry, don't know how to do it. Maybe network bridge is enough. Might be worth a second question.

– RoVo
Mar 28 at 12:48













Is the way in your reply called SSH local port forwarding, or something else?

– Tim
Mar 28 at 12:50





Is the way in your reply called SSH local port forwarding, or something else?

– Tim
Mar 28 at 12:50

















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