Questions

Cannot ping my Internet IP Address from internet

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Cannot ping my Internet IP Address from internet

techrepublic
Hello

I would like to be able to connect to my home computer from the internet. My Speedstream DSL router shows my IP address and I can verify it is not a local ISP address using different sites such as http://network-tools.com/.

The thing is I cannot ping my modem IP from the internet much less try to establish a connection with my computer.

Can my ISP be preventing this? Is there a way to get around this. Here is what my trace route looks like.

TraceRoute to 201.238.102.102 [cuscon24439.tstt.net.tt]

Hop (ms) (ms) (ms) IP Address Host name
1 1 0 0 66.98.244.1 gphou-66-98-244-1.ev1servers.net
2 0 0 0 66.98.241.16 gphou-66-98-241-16.ev1servers.net
3 1 1 1 38.99.206.173 -
4 1 1 1 38.112.36.49 g4-0-0.core01.iah01.atlas.cogentco.com
5 2 1 1 154.54.2.202 t4-1.mpd01.iah01.atlas.cogentco.com
6 13 16 207 154.54.2.14 p13-0.core01.ord01.atlas.cogentco.com
7 6 6 6 154.54.6.62 t4-2.mpd01.dfw03.atlas.cogentco.com
8 7 7 6 154.54.5.189 g15-0-0.core01.dfw03.atlas.cogentco.com
9 7 8 7 154.54.12.250 uunet.dfw03.atlas.cogentco.com
10 8 8 8 152.63.103.77 0.so-3-3-0.xt2.dfw9.alter.net
11 60 60 60 152.63.86.193 0.so-7-0-0.xl2.mia4.alter.net
12 60 60 60 152.63.83.181 pos6-1.ig3.mia4.alter.net
13 99 99 99 63.65.191.106 tstt-gw.customer.alter.net
14 112 111 100 196.3.140.242 cuscon16451.tstt.net.tt
15 Timed out Timed out Timed out -
16 Timed out Timed out Timed out -
17 Timed out Timed out Timed out -
18 Timed out Timed out Timed out -

Trace aborted.

Can't even trace back to my IP.

Please help.
  • +
    0 Votes
    daveo2000

    "ping" is a computer answering a request on a specific port. Ports can be blocked in many places including your own computer.

    It would not be surprising if your ISP was blocking many incoming well-known-ports. In that way, they can "prevent" both you from running a server and others from attacking you. This is usually done by blocking priveliged ports from 1023 down.

    If you are running Linux and can do this, I would suggest the following:

    Set up an SSH daemon listening on a a non-priveliged port (for instance 2200). Now, try an ssh client from outside connecting to that high port. If that works then you have probably proven that lower ports are blocked and found a way around it.

    If you are running Windows, ask somebody to help do the same thing in that environment.

    (Edited to add to the subject line)

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    0 Votes
    Ireneb

    Maybe the IP address is used internally and not internet IP address. You might want to verify with the service provider. Or it could be that the service provider block the ping from internet.

    Hope that help.

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    0 Votes
    CG IT

    if you have a consumer level router, the block ICMP filter might be turned on. If so then the router will drop the ICMP packets and not respond to the ping request.

    many block ICMP packets because of the Ping of Death hack.

  • +
    0 Votes
    daveo2000

    "ping" is a computer answering a request on a specific port. Ports can be blocked in many places including your own computer.

    It would not be surprising if your ISP was blocking many incoming well-known-ports. In that way, they can "prevent" both you from running a server and others from attacking you. This is usually done by blocking priveliged ports from 1023 down.

    If you are running Linux and can do this, I would suggest the following:

    Set up an SSH daemon listening on a a non-priveliged port (for instance 2200). Now, try an ssh client from outside connecting to that high port. If that works then you have probably proven that lower ports are blocked and found a way around it.

    If you are running Windows, ask somebody to help do the same thing in that environment.

    (Edited to add to the subject line)

    +
    0 Votes
    Ireneb

    Maybe the IP address is used internally and not internet IP address. You might want to verify with the service provider. Or it could be that the service provider block the ping from internet.

    Hope that help.

    +
    0 Votes
    CG IT

    if you have a consumer level router, the block ICMP filter might be turned on. If so then the router will drop the ICMP packets and not respond to the ping request.

    many block ICMP packets because of the Ping of Death hack.