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How to send a packet across NAT to local machine
How does NAT share one public IPv4 address across multiple private IPv4 addressesHow NAT / PortForwarding / TCP/IP works?ASA 5525-X PAT only for one IP subnetVery simple NAT question. How does a packet get back out?NAT - inside global addressFor how much period does the NAT table entry stays there even after connection is closed?NAT Translation IP usageHow does Network Address Translation work on my router?How does a router a layer 3 device translate port address in PAT, as it is a layer 3 device?How does packet traversal works over a public network with NAT overloading
I recently read about network address port translation and I have a doubt.
Lets say I have a PC(PC1) at 192.168.1.2 under a router with public address 10.74.65.11 . I have another PC(PC2) at 192.168.1.2 under a router with public address 103.14.51.21.
How do I ping PC1 from PC2?
ping 10.74.65.11 would just ping the router, no?
Further if PC1 has a netcat listener on port 5555 then how can PC2 connect to it?
nat
asked 5 hours ago
user50123user50123
111
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I recently read about network address port translation and I have a doubt.
Lets say I have a PC(PC1) at 192.168.1.2 under a router with public address 10.74.65.11 . I have another PC(PC2) at 192.168.1.2 under a router with public address 103.14.51.21.
How do I ping PC1 from PC2?
ping 10.74.65.11 would just ping the router, no?
Further if PC1 has a netcat listener on port 5555 then how can PC2 connect to it?
nat
asked 5 hours ago
user50123user50123
111
New contributor
user50123 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I recently read about network address port translation and I have a doubt.
Lets say I have a PC(PC1) at 192.168.1.2 under a router with public address 10.74.65.11 . I have another PC(PC2) at 192.168.1.2 under a router with public address 103.14.51.21.
How do I ping PC1 from PC2?
ping 10.74.65.11 would just ping the router, no?
Further if PC1 has a netcat listener on port 5555 then how can PC2 connect to it?
nat
asked 5 hours ago
user50123user50123
111
New contributor
user50123 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I recently read about network address port translation and I have a doubt.
Lets say I have a PC(PC1) at 192.168.1.2 under a router with public address 10.74.65.11 . I have another PC(PC2) at 192.168.1.2 under a router with public address 103.14.51.21.
How do I ping PC1 from PC2?
ping 10.74.65.11 would just ping the router, no?
Further if PC1 has a netcat listener on port 5555 then how can PC2 connect to it?
nat
nat
asked 5 hours ago
user50123user50123
111
New contributor
user50123 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 5 hours ago
user50123user50123
111
New contributor
user50123 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 5 hours ago
user50123user50123
111
New contributor
user50123 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 5 hours ago
user50123user50123
111
asked 5 hours ago
user50123user50123
111
111
New contributor
user50123 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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Check out our Code of Conduct.
add a comment |
add a comment |
2 Answers
2
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votes
For ping (ICMP echo request) to work across NAT, you'd have to forward ICMP (echo requests) from the public IP router to the private IP host (aka destination NAT or reverse NAT). For a normal TCP service you'd just use port forwarding (also DNAT or reverse NAT).
answered 3 hours ago
Zac67Zac67
34.6k22472
add a comment |
For the things you are trying to do you need port forwarding.
With PAT you have one public IP (the IP of the router) and different ports for each communication of the private hosts with outside devices.
If you send a ping request to the routers public IP, the router will respond. So you must send the ping request to a different Port (for instance 50000) and tell the router to forward these packets to the private hosts IP with the ICMP (a.k.a ping) Port. This is called port forwarding.
answered 3 hours ago
watchmewatchme
587111
add a comment |
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2 Answers
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oldest
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2 Answers
2
active
oldest
votes
active
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active
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votes
For ping (ICMP echo request) to work across NAT, you'd have to forward ICMP (echo requests) from the public IP router to the private IP host (aka destination NAT or reverse NAT). For a normal TCP service you'd just use port forwarding (also DNAT or reverse NAT).
answered 3 hours ago
Zac67Zac67
34.6k22472
add a comment |
For ping (ICMP echo request) to work across NAT, you'd have to forward ICMP (echo requests) from the public IP router to the private IP host (aka destination NAT or reverse NAT). For a normal TCP service you'd just use port forwarding (also DNAT or reverse NAT).
answered 3 hours ago
Zac67Zac67
34.6k22472
add a comment |
For ping (ICMP echo request) to work across NAT, you'd have to forward ICMP (echo requests) from the public IP router to the private IP host (aka destination NAT or reverse NAT). For a normal TCP service you'd just use port forwarding (also DNAT or reverse NAT).
answered 3 hours ago
Zac67Zac67
34.6k22472
For ping (ICMP echo request) to work across NAT, you'd have to forward ICMP (echo requests) from the public IP router to the private IP host (aka destination NAT or reverse NAT). For a normal TCP service you'd just use port forwarding (also DNAT or reverse NAT).
answered 3 hours ago
Zac67Zac67
34.6k22472
answered 3 hours ago
Zac67Zac67
34.6k22472
answered 3 hours ago
Zac67Zac67
34.6k22472
answered 3 hours ago
Zac67Zac67
34.6k22472
34.6k22472
add a comment |
add a comment |
For the things you are trying to do you need port forwarding.
With PAT you have one public IP (the IP of the router) and different ports for each communication of the private hosts with outside devices.
If you send a ping request to the routers public IP, the router will respond. So you must send the ping request to a different Port (for instance 50000) and tell the router to forward these packets to the private hosts IP with the ICMP (a.k.a ping) Port. This is called port forwarding.
answered 3 hours ago
watchmewatchme
587111
add a comment |
For the things you are trying to do you need port forwarding.
With PAT you have one public IP (the IP of the router) and different ports for each communication of the private hosts with outside devices.
If you send a ping request to the routers public IP, the router will respond. So you must send the ping request to a different Port (for instance 50000) and tell the router to forward these packets to the private hosts IP with the ICMP (a.k.a ping) Port. This is called port forwarding.
answered 3 hours ago
watchmewatchme
587111
add a comment |
For the things you are trying to do you need port forwarding.
With PAT you have one public IP (the IP of the router) and different ports for each communication of the private hosts with outside devices.
If you send a ping request to the routers public IP, the router will respond. So you must send the ping request to a different Port (for instance 50000) and tell the router to forward these packets to the private hosts IP with the ICMP (a.k.a ping) Port. This is called port forwarding.
answered 3 hours ago
watchmewatchme
587111
For the things you are trying to do you need port forwarding.
With PAT you have one public IP (the IP of the router) and different ports for each communication of the private hosts with outside devices.
If you send a ping request to the routers public IP, the router will respond. So you must send the ping request to a different Port (for instance 50000) and tell the router to forward these packets to the private hosts IP with the ICMP (a.k.a ping) Port. This is called port forwarding.
answered 3 hours ago
watchmewatchme
587111
edited 3 hours ago
answered 3 hours ago
watchmewatchme
587111
answered 3 hours ago
watchmewatchme
587111
answered 3 hours ago
watchmewatchme
587111
587111
add a comment |
add a comment |
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