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Posted to dev@tomcat.apache.org by webmaster <we...@michaelmcgrady.com> on 2003/12/15 04:57:37 UTC
Dynamic DNS
I am trying to use my home computer for development and need to access a
running web server on the computer. However, for some reason I cannot
access Tomcat using a http://[dynamic ip address] like. I get a page
cannot be displayed error. The same http://[dynamic ip address] works when
trying to open Tomcat on my localhost. I used to do this without an
issue. I don't know what has changed. I got Windows XP instead of Windows
98 on my laptop. Could that be it? Any ideas why accessing a webpage on
my laptop should be an issue?
Thanks, Michael McGrady
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Re: Dynamic DNS
Posted by Adam Fisk <af...@limepeer.com>.
Hi Michael-
Given that this is wandering into areas not quite related to Tomcat, we
should probably continue this discussion off list. Feel free to e-mail
me directly at afiskatspeedymaildotorg (insert "@" for "at" and "." for
"dot"). You basically need to tell dynamic dns the external IP of your
modem and have your router forward traffic for you.
Best,
Adam
webmaster wrote:
> Hello, Adam,
>
> Given all the information you get from ipconfig /all, how do you tell
> what the ip address is that can be used to have a foreign host contact a
> server on a wireless laptop? I have a hunch this is not the right
> question. Apparently the isp uses the physical addresses in the subnet
> to route response information from servers to browsers on their
> network. Is that right? Mainly, I want to be able to test my Tomcat
> server running on my laptop from a foreign client at another location.
> The laptop is running a wireless connection to a router from a cable
> connection with my isp. None of the ip addresses supplied by ipconfig
> /all work for that purpose. If I get the ip address that my browser
> gives to a foreign server and resolve that to a host name, it is a
> series of hexidecimal numbers (12 of them)followed by a dot and the isp
> URL, e.g. 000d88870c4e.isp_name.com. What does it all mean?
>
> Michael McGrady
>
> At 08:17 AM 12/15/2003, you wrote:
>
>> You should be able to get your "real" ip address from your router
>> configuration app. You can get your private subnet address from the
>> command line ("ipconfig /all" on Windows, "ip addr" on most Linux
>> distributions, or similar commands). Then you need to forward
>> incoming requests on port 8080 or whatever port you're using now on
>> your router to the listening port on your machine running the server.
>> You're probably already doing all that, but I just thought I'd be
>> explicit.
>>
>> Some dynamic DNS services also have utilities for reporting your real
>> address, although your router should tell you.
>>
>> -adam
>>
>>
>> webmaster wrote:
>>
>>> Thanks, Martin, but I think the problem is that there is a subnet on
>>> a wireless router that makes the true ip address of the tomcat
>>> running on this machine immediately unavailable. What I have to do
>>> is to find out how to find the real ip address. Getting one from a
>>> request object sent to a foreign computer does not seem to work, as
>>> that seems to be an alias from the isp that hides the true ip address
>>> as well. Why the true ip address is hidden by the isp is not clear.
>>> Any ideas?
>>> At 09:26 AM 12/15/2003, you wrote:
>>>
>>>> //check $TOMCAT_HOME/conf/server.xml
>>>>
>>>> <!-- Define a non-SSL Coyote HTTP/1.1 Connector on port 8081 -->
>>>>
>>>> <Connector className="org.apache.coyote.tomcat4.CoyoteConnector"
>>>>
>>>> port="8080" minProcessors="5" maxProcessors="75"
>>>>
>>>> enableLookups="true" redirectPort="8443"
>>>>
>>>> acceptCount="100" debug="0" connectionTimeout="20000"
>>>>
>>>> useURIValidationHack="false" disableUploadTimeout="true" />
>>>>
>>>> Regards,
>>>> Martin
>>>>
>>>> ----- Original Message -----
>>>> From: "webmaster" <we...@michaelmcgrady.com>
>>>> To: "Tomcat Developers List" <to...@jakarta.apache.org>
>>>> Sent: Monday, December 15, 2003 2:05 AM
>>>> Subject: Re: Dynamic DNS
>>>>
>>>>
>>>> > Thanks for the response. I am going to dev because I thought and
>>>> still
>>>> > think a bit that it might be a dev issue. I have tried 8080 without
>>>> > success. I have created a "browser" (URLConnection send on port
>>>> 80 and
>>>> > 8080) within Tomcat which can talk via a port 80 or port 8080 http
>>>> > connection with another tomcat with a dynamic dns. But, trying it
>>>> with
>>>> > another "real" browser it does not work.
>>>> >
>>>> > At 09:24 PM 12/14/2003, you wrote:
>>>> > >This question is probably better asked on the users list.
>>>> > >
>>>> > > > I am trying to use my home computer for development and need
>>>> to access
>>>> a
>>>> > > > running web server on the computer. However, for some reason
>>>> I cannot
>>>> > > > access Tomcat using a http://[dynamic ip address] like.
>>>> > >
>>>> > >Are you running Tomcat on port 80? Many consumer cable/DSL providers
>>>> block
>>>> > >port 80 on their residential IP blocks because of Code Red, Nimda
>>>> c.s.
>>>> Try
>>>> > >running the httpd adaptor of Tomcat on a different port.
>>>> > >
>>>> > >S.
>>>> > >
>>>> > >--
>>>> > >sander@temme.net http://www.temme.net/sander/
>>>> > >PGP FP: 51B4 8727 466A 0BC3 69F4 B7B8 B2BE BC40 1529 24AF
>>>> > >
>>>> > >
>>>> >
>>>> >---------------------------------------------------------------------
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>>>> > >For additional commands, e-mail: tomcat-dev-help@jakarta.apache.org
>>>> >
>>>> >
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Re: Dynamic DNS
Posted by webmaster <we...@michaelmcgrady.com>.
Hello, Adam,
Given all the information you get from ipconfig /all, how do you tell what
the ip address is that can be used to have a foreign host contact a server
on a wireless laptop? I have a hunch this is not the right
question. Apparently the isp uses the physical addresses in the subnet to
route response information from servers to browsers on their network. Is
that right? Mainly, I want to be able to test my Tomcat server running on
my laptop from a foreign client at another location. The laptop is running
a wireless connection to a router from a cable connection with my
isp. None of the ip addresses supplied by ipconfig /all work for that
purpose. If I get the ip address that my browser gives to a foreign server
and resolve that to a host name, it is a series of hexidecimal numbers (12
of them)followed by a dot and the isp URL, e.g.
000d88870c4e.isp_name.com. What does it all mean?
Michael McGrady
At 08:17 AM 12/15/2003, you wrote:
>You should be able to get your "real" ip address from your router
>configuration app. You can get your private subnet address from the
>command line ("ipconfig /all" on Windows, "ip addr" on most Linux
>distributions, or similar commands). Then you need to forward incoming
>requests on port 8080 or whatever port you're using now on your router to
>the listening port on your machine running the server. You're probably
>already doing all that, but I just thought I'd be explicit.
>
>Some dynamic DNS services also have utilities for reporting your real
>address, although your router should tell you.
>
>-adam
>
>
>webmaster wrote:
>
>>Thanks, Martin, but I think the problem is that there is a subnet on a
>>wireless router that makes the true ip address of the tomcat running on
>>this machine immediately unavailable. What I have to do is to find out
>>how to find the real ip address. Getting one from a request object sent
>>to a foreign computer does not seem to work, as that seems to be an alias
>>from the isp that hides the true ip address as well. Why the true ip
>>address is hidden by the isp is not clear. Any ideas?
>>At 09:26 AM 12/15/2003, you wrote:
>>
>>>//check $TOMCAT_HOME/conf/server.xml
>>>
>>><!-- Define a non-SSL Coyote HTTP/1.1 Connector on port 8081 -->
>>>
>>><Connector className="org.apache.coyote.tomcat4.CoyoteConnector"
>>>
>>>port="8080" minProcessors="5" maxProcessors="75"
>>>
>>>enableLookups="true" redirectPort="8443"
>>>
>>>acceptCount="100" debug="0" connectionTimeout="20000"
>>>
>>>useURIValidationHack="false" disableUploadTimeout="true" />
>>>
>>>Regards,
>>>Martin
>>>
>>>----- Original Message -----
>>>From: "webmaster" <we...@michaelmcgrady.com>
>>>To: "Tomcat Developers List" <to...@jakarta.apache.org>
>>>Sent: Monday, December 15, 2003 2:05 AM
>>>Subject: Re: Dynamic DNS
>>>
>>>
>>> > Thanks for the response. I am going to dev because I thought and still
>>> > think a bit that it might be a dev issue. I have tried 8080 without
>>> > success. I have created a "browser" (URLConnection send on port 80 and
>>> > 8080) within Tomcat which can talk via a port 80 or port 8080 http
>>> > connection with another tomcat with a dynamic dns. But, trying it with
>>> > another "real" browser it does not work.
>>> >
>>> > At 09:24 PM 12/14/2003, you wrote:
>>> > >This question is probably better asked on the users list.
>>> > >
>>> > > > I am trying to use my home computer for development and need to
>>> access
>>>a
>>> > > > running web server on the computer. However, for some reason I
>>> cannot
>>> > > > access Tomcat using a http://[dynamic ip address] like.
>>> > >
>>> > >Are you running Tomcat on port 80? Many consumer cable/DSL providers
>>>block
>>> > >port 80 on their residential IP blocks because of Code Red, Nimda c.s.
>>>Try
>>> > >running the httpd adaptor of Tomcat on a different port.
>>> > >
>>> > >S.
>>> > >
>>> > >--
>>> > >sander@temme.net http://www.temme.net/sander/
>>> > >PGP FP: 51B4 8727 466A 0BC3 69F4 B7B8 B2BE BC40 1529 24AF
>>> > >
>>> > >
>>> > >---------------------------------------------------------------------
>>> > >To unsubscribe, e-mail: tomcat-dev-unsubscribe@jakarta.apache.org
>>> > >For additional commands, e-mail: tomcat-dev-help@jakarta.apache.org
>>> >
>>> >
>>> >
>>> > LEGAL NOTICE
>>> >
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>>> > information belonging to the sender which may be confidential and legally
>>> > privileged. This information is intended only for the use of the
>>> > individual or entity to whom this electronic mail transmission was
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>>> > copying, distribution, or action taken in reliance on the contents of the
>>> > information contained in this transmission is strictly prohibited.
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>>> > have received this transmission in error, please delete the message.
>>>Thank
>>> > you
>>> >
>>> >
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>>
>>
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Re: Dynamic DNS
Posted by webmaster <we...@michaelmcgrady.com>.
Thanks, Adam,
This was more than helpful and is much appreciated.
Michael McGrady
At 08:17 AM 12/15/2003, you wrote:
>Adam Fisk <af...@limepeer.com>
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Re: Dynamic DNS
Posted by Adam Fisk <af...@limepeer.com>.
You should be able to get your "real" ip address from your router
configuration app. You can get your private subnet address from the
command line ("ipconfig /all" on Windows, "ip addr" on most Linux
distributions, or similar commands). Then you need to forward incoming
requests on port 8080 or whatever port you're using now on your router
to the listening port on your machine running the server. You're
probably already doing all that, but I just thought I'd be explicit.
Some dynamic DNS services also have utilities for reporting your real
address, although your router should tell you.
-adam
webmaster wrote:
> Thanks, Martin, but I think the problem is that there is a subnet on a
> wireless router that makes the true ip address of the tomcat running on
> this machine immediately unavailable. What I have to do is to find out
> how to find the real ip address. Getting one from a request object sent
> to a foreign computer does not seem to work, as that seems to be an
> alias from the isp that hides the true ip address as well. Why the true
> ip address is hidden by the isp is not clear. Any ideas?
>
> At 09:26 AM 12/15/2003, you wrote:
>
>> //check $TOMCAT_HOME/conf/server.xml
>>
>> <!-- Define a non-SSL Coyote HTTP/1.1 Connector on port 8081 -->
>>
>> <Connector className="org.apache.coyote.tomcat4.CoyoteConnector"
>>
>> port="8080" minProcessors="5" maxProcessors="75"
>>
>> enableLookups="true" redirectPort="8443"
>>
>> acceptCount="100" debug="0" connectionTimeout="20000"
>>
>> useURIValidationHack="false" disableUploadTimeout="true" />
>>
>> Regards,
>> Martin
>>
>> ----- Original Message -----
>> From: "webmaster" <we...@michaelmcgrady.com>
>> To: "Tomcat Developers List" <to...@jakarta.apache.org>
>> Sent: Monday, December 15, 2003 2:05 AM
>> Subject: Re: Dynamic DNS
>>
>>
>> > Thanks for the response. I am going to dev because I thought and still
>> > think a bit that it might be a dev issue. I have tried 8080 without
>> > success. I have created a "browser" (URLConnection send on port 80 and
>> > 8080) within Tomcat which can talk via a port 80 or port 8080 http
>> > connection with another tomcat with a dynamic dns. But, trying it with
>> > another "real" browser it does not work.
>> >
>> > At 09:24 PM 12/14/2003, you wrote:
>> > >This question is probably better asked on the users list.
>> > >
>> > > > I am trying to use my home computer for development and need to
>> access
>> a
>> > > > running web server on the computer. However, for some reason I
>> cannot
>> > > > access Tomcat using a http://[dynamic ip address] like.
>> > >
>> > >Are you running Tomcat on port 80? Many consumer cable/DSL providers
>> block
>> > >port 80 on their residential IP blocks because of Code Red, Nimda c.s.
>> Try
>> > >running the httpd adaptor of Tomcat on a different port.
>> > >
>> > >S.
>> > >
>> > >--
>> > >sander@temme.net http://www.temme.net/sander/
>> > >PGP FP: 51B4 8727 466A 0BC3 69F4 B7B8 B2BE BC40 1529 24AF
>> > >
>> > >
>> > >---------------------------------------------------------------------
>> > >To unsubscribe, e-mail: tomcat-dev-unsubscribe@jakarta.apache.org
>> > >For additional commands, e-mail: tomcat-dev-help@jakarta.apache.org
>> >
>> >
>> >
>> > LEGAL NOTICE
>> >
>> > This electronic mail transmission and any accompanying documents
>> contain
>> > information belonging to the sender which may be confidential and
>> legally
>> > privileged. This information is intended only for the use of the
>> > individual or entity to whom this electronic mail transmission was
>> sent as
>> > indicated above. If you are not the intended recipient, any disclosure,
>> > copying, distribution, or action taken in reliance on the contents
>> of the
>> > information contained in this transmission is strictly prohibited.
>> If you
>> > have received this transmission in error, please delete the message.
>> Thank
>> > you
>> >
>> >
>> >
>> > ---------------------------------------------------------------------
>> > To unsubscribe, e-mail: tomcat-dev-unsubscribe@jakarta.apache.org
>> > For additional commands, e-mail: tomcat-dev-help@jakarta.apache.org
>> >
>> >
>>
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>
>
>
>
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RE: Dynamic DNS
Posted by Danny Angus <da...@apache.org>.
That sounds like NAT (Network Address Translation)
You need to work out what bit of hardware is doing it (usually the router connected to your incoming line) and re-configure it to forward the correct port(s) the the appropriate machines.
In effect NAT allows you to split a single public facing IP address so that different ports are handled by different machines, you create what appears to be one machine out of a small internal network, the approximate opposite of binding several ip addresses to a single machine.
Many domestic routers support NAT, though often with a limit to the number of ports that can be forwarded.
d.
> -----Original Message-----
> From: webmaster [mailto:webmaster@michaelmcgrady.com]
> Sent: 15 December 2003 15:58
> To: Tomcat Developers List
> Subject: Re: Dynamic DNS
>
>
> Thanks, Martin, but I think the problem is that there is a subnet on a
> wireless router that makes the true ip address of the tomcat running on
> this machine immediately unavailable.
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Re: Dynamic DNS
Posted by webmaster <we...@michaelmcgrady.com>.
Thanks, Martin, but I think the problem is that there is a subnet on a
wireless router that makes the true ip address of the tomcat running on
this machine immediately unavailable. What I have to do is to find out how
to find the real ip address. Getting one from a request object sent to a
foreign computer does not seem to work, as that seems to be an alias from
the isp that hides the true ip address as well. Why the true ip address is
hidden by the isp is not clear. Any ideas?
At 09:26 AM 12/15/2003, you wrote:
>//check $TOMCAT_HOME/conf/server.xml
>
><!-- Define a non-SSL Coyote HTTP/1.1 Connector on port 8081 -->
>
><Connector className="org.apache.coyote.tomcat4.CoyoteConnector"
>
>port="8080" minProcessors="5" maxProcessors="75"
>
>enableLookups="true" redirectPort="8443"
>
>acceptCount="100" debug="0" connectionTimeout="20000"
>
>useURIValidationHack="false" disableUploadTimeout="true" />
>
>Regards,
>Martin
>
>----- Original Message -----
>From: "webmaster" <we...@michaelmcgrady.com>
>To: "Tomcat Developers List" <to...@jakarta.apache.org>
>Sent: Monday, December 15, 2003 2:05 AM
>Subject: Re: Dynamic DNS
>
>
> > Thanks for the response. I am going to dev because I thought and still
> > think a bit that it might be a dev issue. I have tried 8080 without
> > success. I have created a "browser" (URLConnection send on port 80 and
> > 8080) within Tomcat which can talk via a port 80 or port 8080 http
> > connection with another tomcat with a dynamic dns. But, trying it with
> > another "real" browser it does not work.
> >
> > At 09:24 PM 12/14/2003, you wrote:
> > >This question is probably better asked on the users list.
> > >
> > > > I am trying to use my home computer for development and need to access
>a
> > > > running web server on the computer. However, for some reason I cannot
> > > > access Tomcat using a http://[dynamic ip address] like.
> > >
> > >Are you running Tomcat on port 80? Many consumer cable/DSL providers
>block
> > >port 80 on their residential IP blocks because of Code Red, Nimda c.s.
>Try
> > >running the httpd adaptor of Tomcat on a different port.
> > >
> > >S.
> > >
> > >--
> > >sander@temme.net http://www.temme.net/sander/
> > >PGP FP: 51B4 8727 466A 0BC3 69F4 B7B8 B2BE BC40 1529 24AF
> > >
> > >
> > >---------------------------------------------------------------------
> > >To unsubscribe, e-mail: tomcat-dev-unsubscribe@jakarta.apache.org
> > >For additional commands, e-mail: tomcat-dev-help@jakarta.apache.org
> >
> >
> >
> > LEGAL NOTICE
> >
> > This electronic mail transmission and any accompanying documents contain
> > information belonging to the sender which may be confidential and legally
> > privileged. This information is intended only for the use of the
> > individual or entity to whom this electronic mail transmission was sent as
> > indicated above. If you are not the intended recipient, any disclosure,
> > copying, distribution, or action taken in reliance on the contents of the
> > information contained in this transmission is strictly prohibited. If you
> > have received this transmission in error, please delete the message.
>Thank
> > you
> >
> >
> >
> > ---------------------------------------------------------------------
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> >
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Re: Dynamic DNS
Posted by Martin Gainty <mg...@hotmail.com>.
//check $TOMCAT_HOME/conf/server.xml
<!-- Define a non-SSL Coyote HTTP/1.1 Connector on port 8081 -->
<Connector className="org.apache.coyote.tomcat4.CoyoteConnector"
port="8080" minProcessors="5" maxProcessors="75"
enableLookups="true" redirectPort="8443"
acceptCount="100" debug="0" connectionTimeout="20000"
useURIValidationHack="false" disableUploadTimeout="true" />
Regards,
Martin
----- Original Message -----
From: "webmaster" <we...@michaelmcgrady.com>
To: "Tomcat Developers List" <to...@jakarta.apache.org>
Sent: Monday, December 15, 2003 2:05 AM
Subject: Re: Dynamic DNS
> Thanks for the response. I am going to dev because I thought and still
> think a bit that it might be a dev issue. I have tried 8080 without
> success. I have created a "browser" (URLConnection send on port 80 and
> 8080) within Tomcat which can talk via a port 80 or port 8080 http
> connection with another tomcat with a dynamic dns. But, trying it with
> another "real" browser it does not work.
>
> At 09:24 PM 12/14/2003, you wrote:
> >This question is probably better asked on the users list.
> >
> > > I am trying to use my home computer for development and need to access
a
> > > running web server on the computer. However, for some reason I cannot
> > > access Tomcat using a http://[dynamic ip address] like.
> >
> >Are you running Tomcat on port 80? Many consumer cable/DSL providers
block
> >port 80 on their residential IP blocks because of Code Red, Nimda c.s.
Try
> >running the httpd adaptor of Tomcat on a different port.
> >
> >S.
> >
> >--
> >sander@temme.net http://www.temme.net/sander/
> >PGP FP: 51B4 8727 466A 0BC3 69F4 B7B8 B2BE BC40 1529 24AF
> >
> >
> >---------------------------------------------------------------------
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>
>
>
> LEGAL NOTICE
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Re: Dynamic DNS
Posted by webmaster <we...@michaelmcgrady.com>.
Thanks for the response. I am going to dev because I thought and still
think a bit that it might be a dev issue. I have tried 8080 without
success. I have created a "browser" (URLConnection send on port 80 and
8080) within Tomcat which can talk via a port 80 or port 8080 http
connection with another tomcat with a dynamic dns. But, trying it with
another "real" browser it does not work.
At 09:24 PM 12/14/2003, you wrote:
>This question is probably better asked on the users list.
>
> > I am trying to use my home computer for development and need to access a
> > running web server on the computer. However, for some reason I cannot
> > access Tomcat using a http://[dynamic ip address] like.
>
>Are you running Tomcat on port 80? Many consumer cable/DSL providers block
>port 80 on their residential IP blocks because of Code Red, Nimda c.s. Try
>running the httpd adaptor of Tomcat on a different port.
>
>S.
>
>--
>sander@temme.net http://www.temme.net/sander/
>PGP FP: 51B4 8727 466A 0BC3 69F4 B7B8 B2BE BC40 1529 24AF
>
>
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>For additional commands, e-mail: tomcat-dev-help@jakarta.apache.org
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Re: Dynamic DNS
Posted by Sander Temme <sa...@temme.net>.
This question is probably better asked on the users list.
> I am trying to use my home computer for development and need to access a
> running web server on the computer. However, for some reason I cannot
> access Tomcat using a http://[dynamic ip address] like.
Are you running Tomcat on port 80? Many consumer cable/DSL providers block
port 80 on their residential IP blocks because of Code Red, Nimda c.s. Try
running the httpd adaptor of Tomcat on a different port.
S.
--
sander@temme.net http://www.temme.net/sander/
PGP FP: 51B4 8727 466A 0BC3 69F4 B7B8 B2BE BC40 1529 24AF
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