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Seeing my public IP when doing ipconfig command
The 2019 Stack Overflow Developer Survey Results Are InCan I have web server on a home network with 1 public IP address?Timeout for echo request for public IPInternet-facing DHCP serverWhere does ISP obtain their IP address from in order to connect to internet?How can I find my subnet mask?Putting A Basic Switch In Front Of Several Basic Linksys Routers?How do ISPs handle Customer IPs blocked by WebHostRouter can connect to internet but clients intermittently can't get beyond the routerHow many public IP can a router have?Putting ISP public IPs on two different firewalls
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A bit convoluted question, but i'll do my best to explain the situation.
I have an ISP issued router/modem. But whenever I check for my IP address on my PC, i get my public address. Furthermore, with any network scanning software, I can basically see all the other hosts under /21 (my mask) subnet(about 2000). They are are other customers of the ISP, and, i can even see the services they are running(like web servers etc.).
Basically, my PC has public IP only. Whenever I host a web server or any other server like Telnet or SSH, it is freely available for access on the web.
The question is, is this normal? And the second question is, how can i mitigate this? Can I put on a router between their modem and my pc, and how would i configure routers outward facing address, as it is changing all the time( ISP uses dhcp to assign addresses to their hosts)
networking security ip
asked Apr 7 at 20:48
I_never_did_start_the_fireI_never_did_start_the_fire
31
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A bit convoluted question, but i'll do my best to explain the situation.
I have an ISP issued router/modem. But whenever I check for my IP address on my PC, i get my public address. Furthermore, with any network scanning software, I can basically see all the other hosts under /21 (my mask) subnet(about 2000). They are are other customers of the ISP, and, i can even see the services they are running(like web servers etc.).
Basically, my PC has public IP only. Whenever I host a web server or any other server like Telnet or SSH, it is freely available for access on the web.
The question is, is this normal? And the second question is, how can i mitigate this? Can I put on a router between their modem and my pc, and how would i configure routers outward facing address, as it is changing all the time( ISP uses dhcp to assign addresses to their hosts)
networking security ip
asked Apr 7 at 20:48
I_never_did_start_the_fireI_never_did_start_the_fire
31
New contributor
I_never_did_start_the_fire 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 |
A bit convoluted question, but i'll do my best to explain the situation.
I have an ISP issued router/modem. But whenever I check for my IP address on my PC, i get my public address. Furthermore, with any network scanning software, I can basically see all the other hosts under /21 (my mask) subnet(about 2000). They are are other customers of the ISP, and, i can even see the services they are running(like web servers etc.).
Basically, my PC has public IP only. Whenever I host a web server or any other server like Telnet or SSH, it is freely available for access on the web.
The question is, is this normal? And the second question is, how can i mitigate this? Can I put on a router between their modem and my pc, and how would i configure routers outward facing address, as it is changing all the time( ISP uses dhcp to assign addresses to their hosts)
networking security ip
asked Apr 7 at 20:48
I_never_did_start_the_fireI_never_did_start_the_fire
31
New contributor
I_never_did_start_the_fire is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
A bit convoluted question, but i'll do my best to explain the situation.
I have an ISP issued router/modem. But whenever I check for my IP address on my PC, i get my public address. Furthermore, with any network scanning software, I can basically see all the other hosts under /21 (my mask) subnet(about 2000). They are are other customers of the ISP, and, i can even see the services they are running(like web servers etc.).
Basically, my PC has public IP only. Whenever I host a web server or any other server like Telnet or SSH, it is freely available for access on the web.
The question is, is this normal? And the second question is, how can i mitigate this? Can I put on a router between their modem and my pc, and how would i configure routers outward facing address, as it is changing all the time( ISP uses dhcp to assign addresses to their hosts)
networking security ip
networking security ip
asked Apr 7 at 20:48
I_never_did_start_the_fireI_never_did_start_the_fire
31
New contributor
I_never_did_start_the_fire is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked Apr 7 at 20:48
I_never_did_start_the_fireI_never_did_start_the_fire
31
New contributor
I_never_did_start_the_fire is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked Apr 7 at 20:48
I_never_did_start_the_fireI_never_did_start_the_fire
31
New contributor
I_never_did_start_the_fire is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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asked Apr 7 at 20:48
I_never_did_start_the_fireI_never_did_start_the_fire
31
asked Apr 7 at 20:48
I_never_did_start_the_fireI_never_did_start_the_fire
31
31
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I_never_did_start_the_fire is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
I_never_did_start_the_fire is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I_never_did_start_the_fire 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 |
add a comment |
1 Answer
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ISP gave you a modem. Your pc is basically in a place where people usually place a home router. The view of the neighborhood that you describe is a typical router's view, i.e. if it opens SSH to the outside, the Internet can try to connect to it.
One drawback with the current setup is that you need extra care with any experiments on the public system, so they didn't impact the security.
To fix the situation, connect a typical home router external (public/internet) interface to the modem, and that's about it. The home router will be a separate box, that won't be so likely to be impacted by any experimental stuff. (Properly naming things, the routing functionality is irrelevant, you need a firewall and a masquerade, which is what a typical "home router" does).
answered Apr 7 at 21:04
kubanczykkubanczyk
10.6k22945
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1 Answer
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1 Answer
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ISP gave you a modem. Your pc is basically in a place where people usually place a home router. The view of the neighborhood that you describe is a typical router's view, i.e. if it opens SSH to the outside, the Internet can try to connect to it.
One drawback with the current setup is that you need extra care with any experiments on the public system, so they didn't impact the security.
To fix the situation, connect a typical home router external (public/internet) interface to the modem, and that's about it. The home router will be a separate box, that won't be so likely to be impacted by any experimental stuff. (Properly naming things, the routing functionality is irrelevant, you need a firewall and a masquerade, which is what a typical "home router" does).
answered Apr 7 at 21:04
kubanczykkubanczyk
10.6k22945
add a comment |
ISP gave you a modem. Your pc is basically in a place where people usually place a home router. The view of the neighborhood that you describe is a typical router's view, i.e. if it opens SSH to the outside, the Internet can try to connect to it.
One drawback with the current setup is that you need extra care with any experiments on the public system, so they didn't impact the security.
To fix the situation, connect a typical home router external (public/internet) interface to the modem, and that's about it. The home router will be a separate box, that won't be so likely to be impacted by any experimental stuff. (Properly naming things, the routing functionality is irrelevant, you need a firewall and a masquerade, which is what a typical "home router" does).
answered Apr 7 at 21:04
kubanczykkubanczyk
10.6k22945
add a comment |
ISP gave you a modem. Your pc is basically in a place where people usually place a home router. The view of the neighborhood that you describe is a typical router's view, i.e. if it opens SSH to the outside, the Internet can try to connect to it.
One drawback with the current setup is that you need extra care with any experiments on the public system, so they didn't impact the security.
To fix the situation, connect a typical home router external (public/internet) interface to the modem, and that's about it. The home router will be a separate box, that won't be so likely to be impacted by any experimental stuff. (Properly naming things, the routing functionality is irrelevant, you need a firewall and a masquerade, which is what a typical "home router" does).
answered Apr 7 at 21:04
kubanczykkubanczyk
10.6k22945
ISP gave you a modem. Your pc is basically in a place where people usually place a home router. The view of the neighborhood that you describe is a typical router's view, i.e. if it opens SSH to the outside, the Internet can try to connect to it.
One drawback with the current setup is that you need extra care with any experiments on the public system, so they didn't impact the security.
To fix the situation, connect a typical home router external (public/internet) interface to the modem, and that's about it. The home router will be a separate box, that won't be so likely to be impacted by any experimental stuff. (Properly naming things, the routing functionality is irrelevant, you need a firewall and a masquerade, which is what a typical "home router" does).
answered Apr 7 at 21:04
kubanczykkubanczyk
10.6k22945
answered Apr 7 at 21:04
kubanczykkubanczyk
10.6k22945
answered Apr 7 at 21:04
kubanczykkubanczyk
10.6k22945
answered Apr 7 at 21:04
kubanczykkubanczyk
10.6k22945
10.6k22945
add a comment |
add a comment |
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