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Is it possible to see my external IP address without making an outbound web request?
Clash Royale CLAN TAG#URR8PPP
up vote
7
down vote
favorite
If your connection is NAT'ed, is it possible to see your external IP address without making an outbound web request?
Any OS (Windows, Linux, etc.) is fine.
networking nat ip-address
edited 15 mins ago
Peter Mortensen
8,271166184
asked 12 hours ago
Axel Persinger
463
add a comment |Â
up vote
7
down vote
favorite
If your connection is NAT'ed, is it possible to see your external IP address without making an outbound web request?
Any OS (Windows, Linux, etc.) is fine.
networking nat ip-address
edited 15 mins ago
Peter Mortensen
8,271166184
asked 12 hours ago
Axel Persinger
463
2
Are you only trying to avoid HTTP, or are you trying to avoid sending any outgoing traffic at all? The only universal solutions involve sending some kind of outgoing traffic, but it doesn't have to be HTTP.
– Spiff
11 hours ago
This was more of just a hypothetical, I didn't want to make any outbound traffic at all.
– Axel Persinger
11 hours ago
Are you saying that your network/router is behind a Enterprise grade NAT setup (ie. it is getting a private IP address from your ISP)? If so, there is no way I have think of that you can find the public IP address without something reaching out to the public network and essentially "looking back" like whatsmyip.com or similar services.
– acejavelin
11 hours ago
add a comment |Â
up vote
7
down vote
favorite
up vote
7
down vote
favorite
If your connection is NAT'ed, is it possible to see your external IP address without making an outbound web request?
Any OS (Windows, Linux, etc.) is fine.
networking nat ip-address
edited 15 mins ago
Peter Mortensen
8,271166184
asked 12 hours ago
Axel Persinger
463
If your connection is NAT'ed, is it possible to see your external IP address without making an outbound web request?
Any OS (Windows, Linux, etc.) is fine.
networking nat ip-address
networking nat ip-address
edited 15 mins ago
Peter Mortensen
8,271166184
asked 12 hours ago
Axel Persinger
463
edited 15 mins ago
Peter Mortensen
8,271166184
asked 12 hours ago
Axel Persinger
463
edited 15 mins ago
Peter Mortensen
8,271166184
edited 15 mins ago
Peter Mortensen
8,271166184
edited 15 mins ago
Peter Mortensen
8,271166184
8,271166184
asked 12 hours ago
Axel Persinger
463
asked 12 hours ago
Axel Persinger
463
asked 12 hours ago
Axel Persinger
463
463
2
Are you only trying to avoid HTTP, or are you trying to avoid sending any outgoing traffic at all? The only universal solutions involve sending some kind of outgoing traffic, but it doesn't have to be HTTP.
– Spiff
11 hours ago
This was more of just a hypothetical, I didn't want to make any outbound traffic at all.
– Axel Persinger
11 hours ago
Are you saying that your network/router is behind a Enterprise grade NAT setup (ie. it is getting a private IP address from your ISP)? If so, there is no way I have think of that you can find the public IP address without something reaching out to the public network and essentially "looking back" like whatsmyip.com or similar services.
– acejavelin
11 hours ago
add a comment |Â
2
Are you only trying to avoid HTTP, or are you trying to avoid sending any outgoing traffic at all? The only universal solutions involve sending some kind of outgoing traffic, but it doesn't have to be HTTP.
– Spiff
11 hours ago
This was more of just a hypothetical, I didn't want to make any outbound traffic at all.
– Axel Persinger
11 hours ago
Are you saying that your network/router is behind a Enterprise grade NAT setup (ie. it is getting a private IP address from your ISP)? If so, there is no way I have think of that you can find the public IP address without something reaching out to the public network and essentially "looking back" like whatsmyip.com or similar services.
– acejavelin
11 hours ago
2
2
Are you only trying to avoid HTTP, or are you trying to avoid sending any outgoing traffic at all? The only universal solutions involve sending some kind of outgoing traffic, but it doesn't have to be HTTP.
– Spiff
11 hours ago
Are you only trying to avoid HTTP, or are you trying to avoid sending any outgoing traffic at all? The only universal solutions involve sending some kind of outgoing traffic, but it doesn't have to be HTTP.
– Spiff
11 hours ago
This was more of just a hypothetical, I didn't want to make any outbound traffic at all.
– Axel Persinger
11 hours ago
This was more of just a hypothetical, I didn't want to make any outbound traffic at all.
– Axel Persinger
11 hours ago
Are you saying that your network/router is behind a Enterprise grade NAT setup (ie. it is getting a private IP address from your ISP)? If so, there is no way I have think of that you can find the public IP address without something reaching out to the public network and essentially "looking back" like whatsmyip.com or similar services.
– acejavelin
11 hours ago
Are you saying that your network/router is behind a Enterprise grade NAT setup (ie. it is getting a private IP address from your ISP)? If so, there is no way I have think of that you can find the public IP address without something reaching out to the public network and essentially "looking back" like whatsmyip.com or similar services.
– acejavelin
11 hours ago
add a comment |Â
4 Answers
4
active
oldest
votes
up vote
8
down vote
If your computer is behind NAT, it is possible for you to see the external IP address
of your router, but you need administrative access to the router.
The router knows your external IP address, so by accessing its configuration
page you can find that IP address.
Any other way will require making an external Web request.
edited 14 mins ago
Peter Mortensen
8,271166184
answered 11 hours ago
harrymc
244k10254537
This seems like it's answering a different question than OP is asking.
– Spiff
11 hours ago
@Spiff: I have re-written my answer. A comment would have been enough to signal that misunderstanding.
– harrymc
11 hours ago
add a comment |Â
up vote
5
down vote
There are a few ways that work with some NATs but nothing that's guaranteed to work everywhere.
I believe uPnP, NAT-PMP, and PCP (Universal Plug And Play, NAT Port Mapping Protocol, and the Port Control Protocol) all have ways to ask a compliant NAT gateway what the public address is, but not all NATs support these protocols. Support is more common in home gateway routers than in corporate or carrier-grade NAT solutions.
When you find yourself behind a NAT, the only sure way to see what public IP address it is translating your traffic into is to send some outgoing traffic to some public host that will report back, in a way the NAT won't translate, what address your traffic appeared to come from. Using a web based service is one way, but you could also do it by, say, SSHing into a cloud server instance and seeing where sshd says your SSH session is coming from.
answered 11 hours ago
Spiff
75.1k10114156
4
Also UPnP etc. could give a false result if the system was behind double (or more) NAT.
– user71659
7 hours ago
@user71659 I have been wondering if there exist an anycast address which will automatically be routed to the outermost NAT such that it can be used for that kind of request.
– kasperd
6 hours ago
@kasperd Every NAT thinks it's the outermost NAT. There are certainly IPs that are automatically routed outside of all NATs. Those are called public IPs.
– user20574
3 hours ago
add a comment |Â
up vote
2
down vote
I would like to add one point to already existing answers.
It also depends on the network complexity. It is possible that your computer is located within a network that has multiple external IP addresses and the router somewhere up the line sends the traffic out to the Internet based on some criteria: for example, destination IP-address, or time of day (may be one uplink channel is cheaper at night or for other reasons).
So, to be complete, a notion of "external IP address" may require defining a destination point to which your address is being external.
In the example below Router #2 could perform NAT and send traffic to either uplinks and the receiving host could see different external IP-address for the Host.
Or it could be that a certain destination (for example host1.example.com) always routes thru the Uplink A, and the host host2.example.com always routes via Uplink B. So, your external IP addresses as seen by those hosts will be different, providing that Uplink A and Uplink B are different ISPs.
Uplink A Uplink B
------------- -------------
| |
| |
| 192.168.1.1 192.168.50.50 |
| ----------- |
|---------------|Router #2|---------------|
-----------
| 192.168.100.1
|
| 192.168.100.2
-----------
|Router #1|
-----------
| 192.168.200.1
|
| 192.168.200.2
-----------
| Host |
-----------
So, sending traffic out will allow to get more reliable results.
answered 6 hours ago
VL-80
3,56922133
add a comment |Â
up vote
0
down vote
You can use a DNS request, which I believe would not fall under the category of "web request":
nslookup myip.opendns.com resolver1.opendns.com
answered 21 secs ago
Mehrdad
13.9k36111185
add a comment |Â
4 Answers
4
active
oldest
votes
4 Answers
4
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
8
down vote
If your computer is behind NAT, it is possible for you to see the external IP address
of your router, but you need administrative access to the router.
The router knows your external IP address, so by accessing its configuration
page you can find that IP address.
Any other way will require making an external Web request.
edited 14 mins ago
Peter Mortensen
8,271166184
answered 11 hours ago
harrymc
244k10254537
This seems like it's answering a different question than OP is asking.
– Spiff
11 hours ago
@Spiff: I have re-written my answer. A comment would have been enough to signal that misunderstanding.
– harrymc
11 hours ago
add a comment |Â
up vote
8
down vote
If your computer is behind NAT, it is possible for you to see the external IP address
of your router, but you need administrative access to the router.
The router knows your external IP address, so by accessing its configuration
page you can find that IP address.
Any other way will require making an external Web request.
edited 14 mins ago
Peter Mortensen
8,271166184
answered 11 hours ago
harrymc
244k10254537
This seems like it's answering a different question than OP is asking.
– Spiff
11 hours ago
@Spiff: I have re-written my answer. A comment would have been enough to signal that misunderstanding.
– harrymc
11 hours ago
add a comment |Â
up vote
8
down vote
up vote
8
down vote
If your computer is behind NAT, it is possible for you to see the external IP address
of your router, but you need administrative access to the router.
The router knows your external IP address, so by accessing its configuration
page you can find that IP address.
Any other way will require making an external Web request.
edited 14 mins ago
Peter Mortensen
8,271166184
answered 11 hours ago
harrymc
244k10254537
If your computer is behind NAT, it is possible for you to see the external IP address
of your router, but you need administrative access to the router.
The router knows your external IP address, so by accessing its configuration
page you can find that IP address.
Any other way will require making an external Web request.
edited 14 mins ago
Peter Mortensen
8,271166184
answered 11 hours ago
harrymc
244k10254537
edited 14 mins ago
Peter Mortensen
8,271166184
edited 14 mins ago
Peter Mortensen
8,271166184
edited 14 mins ago
Peter Mortensen
8,271166184
8,271166184
answered 11 hours ago
harrymc
244k10254537
answered 11 hours ago
harrymc
244k10254537
answered 11 hours ago
harrymc
244k10254537
244k10254537
This seems like it's answering a different question than OP is asking.
– Spiff
11 hours ago
@Spiff: I have re-written my answer. A comment would have been enough to signal that misunderstanding.
– harrymc
11 hours ago
add a comment |Â
This seems like it's answering a different question than OP is asking.
– Spiff
11 hours ago
@Spiff: I have re-written my answer. A comment would have been enough to signal that misunderstanding.
– harrymc
11 hours ago
This seems like it's answering a different question than OP is asking.
– Spiff
11 hours ago
This seems like it's answering a different question than OP is asking.
– Spiff
11 hours ago
@Spiff: I have re-written my answer. A comment would have been enough to signal that misunderstanding.
– harrymc
11 hours ago
@Spiff: I have re-written my answer. A comment would have been enough to signal that misunderstanding.
– harrymc
11 hours ago
add a comment |Â
up vote
5
down vote
There are a few ways that work with some NATs but nothing that's guaranteed to work everywhere.
I believe uPnP, NAT-PMP, and PCP (Universal Plug And Play, NAT Port Mapping Protocol, and the Port Control Protocol) all have ways to ask a compliant NAT gateway what the public address is, but not all NATs support these protocols. Support is more common in home gateway routers than in corporate or carrier-grade NAT solutions.
When you find yourself behind a NAT, the only sure way to see what public IP address it is translating your traffic into is to send some outgoing traffic to some public host that will report back, in a way the NAT won't translate, what address your traffic appeared to come from. Using a web based service is one way, but you could also do it by, say, SSHing into a cloud server instance and seeing where sshd says your SSH session is coming from.
answered 11 hours ago
Spiff
75.1k10114156
4
Also UPnP etc. could give a false result if the system was behind double (or more) NAT.
– user71659
7 hours ago
@user71659 I have been wondering if there exist an anycast address which will automatically be routed to the outermost NAT such that it can be used for that kind of request.
– kasperd
6 hours ago
@kasperd Every NAT thinks it's the outermost NAT. There are certainly IPs that are automatically routed outside of all NATs. Those are called public IPs.
– user20574
3 hours ago
add a comment |Â
up vote
5
down vote
There are a few ways that work with some NATs but nothing that's guaranteed to work everywhere.
I believe uPnP, NAT-PMP, and PCP (Universal Plug And Play, NAT Port Mapping Protocol, and the Port Control Protocol) all have ways to ask a compliant NAT gateway what the public address is, but not all NATs support these protocols. Support is more common in home gateway routers than in corporate or carrier-grade NAT solutions.
When you find yourself behind a NAT, the only sure way to see what public IP address it is translating your traffic into is to send some outgoing traffic to some public host that will report back, in a way the NAT won't translate, what address your traffic appeared to come from. Using a web based service is one way, but you could also do it by, say, SSHing into a cloud server instance and seeing where sshd says your SSH session is coming from.
answered 11 hours ago
Spiff
75.1k10114156
4
Also UPnP etc. could give a false result if the system was behind double (or more) NAT.
– user71659
7 hours ago
@user71659 I have been wondering if there exist an anycast address which will automatically be routed to the outermost NAT such that it can be used for that kind of request.
– kasperd
6 hours ago
@kasperd Every NAT thinks it's the outermost NAT. There are certainly IPs that are automatically routed outside of all NATs. Those are called public IPs.
– user20574
3 hours ago
add a comment |Â
up vote
5
down vote
up vote
5
down vote
There are a few ways that work with some NATs but nothing that's guaranteed to work everywhere.
I believe uPnP, NAT-PMP, and PCP (Universal Plug And Play, NAT Port Mapping Protocol, and the Port Control Protocol) all have ways to ask a compliant NAT gateway what the public address is, but not all NATs support these protocols. Support is more common in home gateway routers than in corporate or carrier-grade NAT solutions.
When you find yourself behind a NAT, the only sure way to see what public IP address it is translating your traffic into is to send some outgoing traffic to some public host that will report back, in a way the NAT won't translate, what address your traffic appeared to come from. Using a web based service is one way, but you could also do it by, say, SSHing into a cloud server instance and seeing where sshd says your SSH session is coming from.
answered 11 hours ago
Spiff
75.1k10114156
There are a few ways that work with some NATs but nothing that's guaranteed to work everywhere.
I believe uPnP, NAT-PMP, and PCP (Universal Plug And Play, NAT Port Mapping Protocol, and the Port Control Protocol) all have ways to ask a compliant NAT gateway what the public address is, but not all NATs support these protocols. Support is more common in home gateway routers than in corporate or carrier-grade NAT solutions.
When you find yourself behind a NAT, the only sure way to see what public IP address it is translating your traffic into is to send some outgoing traffic to some public host that will report back, in a way the NAT won't translate, what address your traffic appeared to come from. Using a web based service is one way, but you could also do it by, say, SSHing into a cloud server instance and seeing where sshd says your SSH session is coming from.
answered 11 hours ago
Spiff
75.1k10114156
answered 11 hours ago
Spiff
75.1k10114156
answered 11 hours ago
Spiff
75.1k10114156
answered 11 hours ago
Spiff
75.1k10114156
75.1k10114156
4
Also UPnP etc. could give a false result if the system was behind double (or more) NAT.
– user71659
7 hours ago
@user71659 I have been wondering if there exist an anycast address which will automatically be routed to the outermost NAT such that it can be used for that kind of request.
– kasperd
6 hours ago
@kasperd Every NAT thinks it's the outermost NAT. There are certainly IPs that are automatically routed outside of all NATs. Those are called public IPs.
– user20574
3 hours ago
add a comment |Â
4
Also UPnP etc. could give a false result if the system was behind double (or more) NAT.
– user71659
7 hours ago
@user71659 I have been wondering if there exist an anycast address which will automatically be routed to the outermost NAT such that it can be used for that kind of request.
– kasperd
6 hours ago
@kasperd Every NAT thinks it's the outermost NAT. There are certainly IPs that are automatically routed outside of all NATs. Those are called public IPs.
– user20574
3 hours ago
4
4
Also UPnP etc. could give a false result if the system was behind double (or more) NAT.
– user71659
7 hours ago
Also UPnP etc. could give a false result if the system was behind double (or more) NAT.
– user71659
7 hours ago
@user71659 I have been wondering if there exist an anycast address which will automatically be routed to the outermost NAT such that it can be used for that kind of request.
– kasperd
6 hours ago
@user71659 I have been wondering if there exist an anycast address which will automatically be routed to the outermost NAT such that it can be used for that kind of request.
– kasperd
6 hours ago
@kasperd Every NAT thinks it's the outermost NAT. There are certainly IPs that are automatically routed outside of all NATs. Those are called public IPs.
– user20574
3 hours ago
@kasperd Every NAT thinks it's the outermost NAT. There are certainly IPs that are automatically routed outside of all NATs. Those are called public IPs.
– user20574
3 hours ago
add a comment |Â
up vote
2
down vote
I would like to add one point to already existing answers.
It also depends on the network complexity. It is possible that your computer is located within a network that has multiple external IP addresses and the router somewhere up the line sends the traffic out to the Internet based on some criteria: for example, destination IP-address, or time of day (may be one uplink channel is cheaper at night or for other reasons).
So, to be complete, a notion of "external IP address" may require defining a destination point to which your address is being external.
In the example below Router #2 could perform NAT and send traffic to either uplinks and the receiving host could see different external IP-address for the Host.
Or it could be that a certain destination (for example host1.example.com) always routes thru the Uplink A, and the host host2.example.com always routes via Uplink B. So, your external IP addresses as seen by those hosts will be different, providing that Uplink A and Uplink B are different ISPs.
Uplink A Uplink B
------------- -------------
| |
| |
| 192.168.1.1 192.168.50.50 |
| ----------- |
|---------------|Router #2|---------------|
-----------
| 192.168.100.1
|
| 192.168.100.2
-----------
|Router #1|
-----------
| 192.168.200.1
|
| 192.168.200.2
-----------
| Host |
-----------
So, sending traffic out will allow to get more reliable results.
answered 6 hours ago
VL-80
3,56922133
add a comment |Â
up vote
2
down vote
I would like to add one point to already existing answers.
It also depends on the network complexity. It is possible that your computer is located within a network that has multiple external IP addresses and the router somewhere up the line sends the traffic out to the Internet based on some criteria: for example, destination IP-address, or time of day (may be one uplink channel is cheaper at night or for other reasons).
So, to be complete, a notion of "external IP address" may require defining a destination point to which your address is being external.
In the example below Router #2 could perform NAT and send traffic to either uplinks and the receiving host could see different external IP-address for the Host.
Or it could be that a certain destination (for example host1.example.com) always routes thru the Uplink A, and the host host2.example.com always routes via Uplink B. So, your external IP addresses as seen by those hosts will be different, providing that Uplink A and Uplink B are different ISPs.
Uplink A Uplink B
------------- -------------
| |
| |
| 192.168.1.1 192.168.50.50 |
| ----------- |
|---------------|Router #2|---------------|
-----------
| 192.168.100.1
|
| 192.168.100.2
-----------
|Router #1|
-----------
| 192.168.200.1
|
| 192.168.200.2
-----------
| Host |
-----------
So, sending traffic out will allow to get more reliable results.
answered 6 hours ago
VL-80
3,56922133
add a comment |Â
up vote
2
down vote
up vote
2
down vote
I would like to add one point to already existing answers.
It also depends on the network complexity. It is possible that your computer is located within a network that has multiple external IP addresses and the router somewhere up the line sends the traffic out to the Internet based on some criteria: for example, destination IP-address, or time of day (may be one uplink channel is cheaper at night or for other reasons).
So, to be complete, a notion of "external IP address" may require defining a destination point to which your address is being external.
In the example below Router #2 could perform NAT and send traffic to either uplinks and the receiving host could see different external IP-address for the Host.
Or it could be that a certain destination (for example host1.example.com) always routes thru the Uplink A, and the host host2.example.com always routes via Uplink B. So, your external IP addresses as seen by those hosts will be different, providing that Uplink A and Uplink B are different ISPs.
Uplink A Uplink B
------------- -------------
| |
| |
| 192.168.1.1 192.168.50.50 |
| ----------- |
|---------------|Router #2|---------------|
-----------
| 192.168.100.1
|
| 192.168.100.2
-----------
|Router #1|
-----------
| 192.168.200.1
|
| 192.168.200.2
-----------
| Host |
-----------
So, sending traffic out will allow to get more reliable results.
answered 6 hours ago
VL-80
3,56922133
I would like to add one point to already existing answers.
It also depends on the network complexity. It is possible that your computer is located within a network that has multiple external IP addresses and the router somewhere up the line sends the traffic out to the Internet based on some criteria: for example, destination IP-address, or time of day (may be one uplink channel is cheaper at night or for other reasons).
So, to be complete, a notion of "external IP address" may require defining a destination point to which your address is being external.
In the example below Router #2 could perform NAT and send traffic to either uplinks and the receiving host could see different external IP-address for the Host.
Or it could be that a certain destination (for example host1.example.com) always routes thru the Uplink A, and the host host2.example.com always routes via Uplink B. So, your external IP addresses as seen by those hosts will be different, providing that Uplink A and Uplink B are different ISPs.
Uplink A Uplink B
------------- -------------
| |
| |
| 192.168.1.1 192.168.50.50 |
| ----------- |
|---------------|Router #2|---------------|
-----------
| 192.168.100.1
|
| 192.168.100.2
-----------
|Router #1|
-----------
| 192.168.200.1
|
| 192.168.200.2
-----------
| Host |
-----------
So, sending traffic out will allow to get more reliable results.
answered 6 hours ago
VL-80
3,56922133
answered 6 hours ago
VL-80
3,56922133
answered 6 hours ago
VL-80
3,56922133
answered 6 hours ago
VL-80
3,56922133
3,56922133
add a comment |Â
add a comment |Â
up vote
0
down vote
You can use a DNS request, which I believe would not fall under the category of "web request":
nslookup myip.opendns.com resolver1.opendns.com
answered 21 secs ago
Mehrdad
13.9k36111185
add a comment |Â
up vote
0
down vote
You can use a DNS request, which I believe would not fall under the category of "web request":
nslookup myip.opendns.com resolver1.opendns.com
answered 21 secs ago
Mehrdad
13.9k36111185
add a comment |Â
up vote
0
down vote
up vote
0
down vote
You can use a DNS request, which I believe would not fall under the category of "web request":
nslookup myip.opendns.com resolver1.opendns.com
answered 21 secs ago
Mehrdad
13.9k36111185
You can use a DNS request, which I believe would not fall under the category of "web request":
nslookup myip.opendns.com resolver1.opendns.com
answered 21 secs ago
Mehrdad
13.9k36111185
answered 21 secs ago
Mehrdad
13.9k36111185
answered 21 secs ago
Mehrdad
13.9k36111185
answered 21 secs ago
Mehrdad
13.9k36111185
13.9k36111185
add a comment |Â
add a comment |Â
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2
Are you only trying to avoid HTTP, or are you trying to avoid sending any outgoing traffic at all? The only universal solutions involve sending some kind of outgoing traffic, but it doesn't have to be HTTP.
– Spiff
11 hours ago
This was more of just a hypothetical, I didn't want to make any outbound traffic at all.
– Axel Persinger
11 hours ago
Are you saying that your network/router is behind a Enterprise grade NAT setup (ie. it is getting a private IP address from your ISP)? If so, there is no way I have think of that you can find the public IP address without something reaching out to the public network and essentially "looking back" like whatsmyip.com or similar services.
– acejavelin
11 hours ago