Scan network settings from inside (pretend to be outside)
up vote
0
down vote
favorite
Is this possible? With nmap or similar tools? Basically I've setup NAT and security policies on my private network. Now I need to test them. Ideally I want to test them from my PC (that is on the private network).
E.g. I enabled SSH on a certain local machine (TCP 22) and setup forwarding to from my router port 8022 to local machine IP:22.
Doing nmap <my_public_ip> does not work from within the network.
networking nmap
asked Nov 29 at 15:30
emihir0
1033
add a comment |
up vote
0
down vote
favorite
Is this possible? With nmap or similar tools? Basically I've setup NAT and security policies on my private network. Now I need to test them. Ideally I want to test them from my PC (that is on the private network).
E.g. I enabled SSH on a certain local machine (TCP 22) and setup forwarding to from my router port 8022 to local machine IP:22.
Doing nmap <my_public_ip> does not work from within the network.
networking nmap
asked Nov 29 at 15:30
emihir0
1033
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
Is this possible? With nmap or similar tools? Basically I've setup NAT and security policies on my private network. Now I need to test them. Ideally I want to test them from my PC (that is on the private network).
E.g. I enabled SSH on a certain local machine (TCP 22) and setup forwarding to from my router port 8022 to local machine IP:22.
Doing nmap <my_public_ip> does not work from within the network.
networking nmap
asked Nov 29 at 15:30
emihir0
1033
Is this possible? With nmap or similar tools? Basically I've setup NAT and security policies on my private network. Now I need to test them. Ideally I want to test them from my PC (that is on the private network).
E.g. I enabled SSH on a certain local machine (TCP 22) and setup forwarding to from my router port 8022 to local machine IP:22.
Doing nmap <my_public_ip> does not work from within the network.
networking nmap
networking nmap
asked Nov 29 at 15:30
emihir0
1033
asked Nov 29 at 15:30
emihir0
1033
asked Nov 29 at 15:30
emihir0
1033
asked Nov 29 at 15:30
emihir0
1033
asked Nov 29 at 15:30
emihir0
1033
1033
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
up vote
1
down vote
accepted
With a standard home router? Probably not.
You need the ability to do hair-pinning - which allows traffic to appear to be coming from the external IP when in fact it's originating within the network. While you may get this ability on enterprise routers, it's unlikely that you'll be able to do it on a standard home router.
Instead, look at getting a cheap server, which you can use for a few hours to do your testing from. This way you'll genuinely be testing your service as if you're connecting from outside (as you will be) and can confirm everything as it should be.
answered Nov 29 at 15:34
djsmiley2k
4,88612335
add a comment |
Your Answer
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "3"
};
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: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
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%2fsuperuser.com%2fquestions%2f1379457%2fscan-network-settings-from-inside-pretend-to-be-outside%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
accepted
With a standard home router? Probably not.
You need the ability to do hair-pinning - which allows traffic to appear to be coming from the external IP when in fact it's originating within the network. While you may get this ability on enterprise routers, it's unlikely that you'll be able to do it on a standard home router.
Instead, look at getting a cheap server, which you can use for a few hours to do your testing from. This way you'll genuinely be testing your service as if you're connecting from outside (as you will be) and can confirm everything as it should be.
answered Nov 29 at 15:34
djsmiley2k
4,88612335
add a comment |
up vote
1
down vote
accepted
With a standard home router? Probably not.
You need the ability to do hair-pinning - which allows traffic to appear to be coming from the external IP when in fact it's originating within the network. While you may get this ability on enterprise routers, it's unlikely that you'll be able to do it on a standard home router.
Instead, look at getting a cheap server, which you can use for a few hours to do your testing from. This way you'll genuinely be testing your service as if you're connecting from outside (as you will be) and can confirm everything as it should be.
answered Nov 29 at 15:34
djsmiley2k
4,88612335
add a comment |
up vote
1
down vote
accepted
up vote
1
down vote
accepted
With a standard home router? Probably not.
You need the ability to do hair-pinning - which allows traffic to appear to be coming from the external IP when in fact it's originating within the network. While you may get this ability on enterprise routers, it's unlikely that you'll be able to do it on a standard home router.
Instead, look at getting a cheap server, which you can use for a few hours to do your testing from. This way you'll genuinely be testing your service as if you're connecting from outside (as you will be) and can confirm everything as it should be.
answered Nov 29 at 15:34
djsmiley2k
4,88612335
With a standard home router? Probably not.
You need the ability to do hair-pinning - which allows traffic to appear to be coming from the external IP when in fact it's originating within the network. While you may get this ability on enterprise routers, it's unlikely that you'll be able to do it on a standard home router.
Instead, look at getting a cheap server, which you can use for a few hours to do your testing from. This way you'll genuinely be testing your service as if you're connecting from outside (as you will be) and can confirm everything as it should be.
answered Nov 29 at 15:34
djsmiley2k
4,88612335
answered Nov 29 at 15:34
djsmiley2k
4,88612335
answered Nov 29 at 15:34
djsmiley2k
4,88612335
answered Nov 29 at 15:34
djsmiley2k
4,88612335
4,88612335
add a comment |
add a comment |
Thanks for contributing an answer to Super User!
- 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.
Some of your past answers have not been well-received, and you're in danger of being blocked from answering.
Please pay close attention to the following guidance:
- 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%2fsuperuser.com%2fquestions%2f1379457%2fscan-network-settings-from-inside-pretend-to-be-outside%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
