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David J. Dachtera
*nix forums Guru Wannabe
Joined: 21 Mar 2006
Posts: 197
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 Posted: Fri Jul 21, 2006 2:03 am Post subject:
Re: DYNDNS client for OpenVMS?
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Julian Wolfe wrote:
| Quote: |
HI there,
I'm looking at putting my Alpha on the front end of my network for my
own general usage and web serving some small sites. Is there a client
around for using the DYNDNS service?
Any help would be appreciated.
Thanks!
Julian
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Take a look at: http://www.djesys.com/freeware/vms/dyndns_vms.dcl
This is a "sanitized" version of the one I run. I originally got from
Aaron Sakovich, possibly from the OpenVMS.org forums. Note that this
requires WGET from Steve Schweda.
I run a jacket around it so it runs nightly in a batch job.
I'm still hoping to someday make some freeware stuff available off my
hobbyist Alpha via anonymous FTP. Not there yet...
--
David J Dachtera
dba DJE Systems
http://www.djesys.com/
Unofficial OpenVMS Marketing Home Page
http://www.djesys.com/vms/market/
Unofficial Affordable OpenVMS Home Page:
http://www.djesys.com/vms/soho/
Unofficial OpenVMS-IA32 Home Page:
http://www.djesys.com/vms/ia32/
Unofficial OpenVMS Hobbyist Support Page:
http://www.djesys.com/vms/support/ |
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JF Mezei
*nix forums Guru
Joined: 21 Jul 2005
Posts: 2556
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| Posted: Thu Jul 20, 2006 2:29 am Post subject:
Re: DYNDNS client for OpenVMS?
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John Santos wrote:
| Quote: | This should *never* happen. When you renew a lease, you should always
get the same address back.
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Wrong.
Consider the ISP planning some router/network changes. They will program
the DHCP server to stop renewing/giving IPs in a certain block and
instead move all customers to a new IP block. Wait for all leases in the
old IP block to expire and they can then make the router changes. |
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John Santos
*nix forums Guru Wannabe
Joined: 25 May 2005
Posts: 189
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| Posted: Thu Jul 20, 2006 1:31 am Post subject:
Re: DYNDNS client for OpenVMS?
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JF Mezei wrote:
| Quote: | One thing to consider: VMS is not well suited for dynamic IPs. Its DHCP
client doesn't seem to be so easy to get working.
So, when the VMS DHCP client renewes a lease and is told to use a
different IP address, can you intercept this and immediatly update the
DYNDNS entry, or will you be doing this at regular intervals and hope
there isn't too long a time between your DYNDNS entry not pointing to a
newly assigned IP ?
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This should *never* happen. When you renew a lease, you should always
get the same address back. The only time you should get a different
address is if you crash or shut down and stay down longer than the
lease period. Then when you come back up, and ask for an address,
the DHCP server will give you a new one, but only if your old address
has been assigned to someone else or if the DHCP server also crashed
and forgot about you. In these cases your client has rebooted, so it
knows it should register its address with DYNDNS.
| Quote: | It is much easier and much more robust to get a router that does the
DHCP/PPPoE and automatic DYNDNS interface so that your DYNDNS is
automatically yupdated whenever the pullic IP changes, and this allows
your VMS host to operate with a fixed IP address which is much easier to manage.
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There are other advantages to having a fixed IP on your LAN, such as
having a NAT server in your firewall/router that knows to forward,
e.g. HTTP to your VAX and SMTP services to your other VAX and block
all of the other TCP ports to keep bad guys out of your PC.
--
John Santos
Evans Griffiths & Hart, Inc.
781-861-0670 ext 539 |
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Peter 'EPLAN' LANGSTOEGER
*nix forums Guru
Joined: 21 Jul 2005
Posts: 517
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| Posted: Wed Jul 19, 2006 8:23 pm Post subject:
Re: DYNDNS client for OpenVMS?
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In article <44BE6FAF.C55F194C@teksavvy.com>, JF Mezei <jfmezei.spamnot@teksavvy.com> writes:
| Quote: | One thing to consider: VMS is not well suited for dynamic IPs. Its DHCP
client doesn't seem to be so easy to get working.
|
The OpenVMS TCPIP DHCP client is not the real problem (and is easy to config).
OpenVMS TCPIP services which refuse to start while the DHCP client still
does try to get a valid IP address and services which don't restart/survive
while the DHCP client renews its address (releases the IP address and gets
another address instead) are the real problem. The PWIP Driver is just one
of them (and for me the most important) and makes DHCP clients on VMS still
a nightmare. Better see VMS as a server and give it a fixed address and let
the firewall/router to the DHCP (and DynDNS) client part...
--
Peter "EPLAN" LANGSTOEGER
Network and OpenVMS system specialist
E-mail peter@langstoeger.at
A-1030 VIENNA AUSTRIA I'm not a pessimist, I'm a realist |
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JF Mezei
*nix forums Guru
Joined: 21 Jul 2005
Posts: 2556
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| Posted: Wed Jul 19, 2006 5:45 pm Post subject:
Re: DYNDNS client for OpenVMS?
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One thing to consider: VMS is not well suited for dynamic IPs. Its DHCP
client doesn't seem to be so easy to get working.
So, when the VMS DHCP client renewes a lease and is told to use a
different IP address, can you intercept this and immediatly update the
DYNDNS entry, or will you be doing this at regular intervals and hope
there isn't too long a time between your DYNDNS entry not pointing to a
newly assigned IP ?
It is much easier and much more robust to get a router that does the
DHCP/PPPoE and automatic DYNDNS interface so that your DYNDNS is
automatically yupdated whenever the pullic IP changes, and this allows
your VMS host to operate with a fixed IP address which is much easier to manage. |
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Keith Cayemberg
*nix forums addict
Joined: 26 May 2005
Posts: 80
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| Posted: Wed Jul 19, 2006 7:52 am Post subject:
Re: DYNDNS client for OpenVMS?
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DDCLIENT for VMS - Used for ZONEEDIT.COM and DYNDNS.COM
http://www.firstdbasource.com/ddclient_vms.zip
Cheers!
Keith Cayemberg
Julian Wolfe wrote:
| Quote: | HI there,
I'm looking at putting my Alpha on the front end of my network for my
own general usage and web serving some small sites. Is there a client
around for using the DYNDNS service?
Any help would be appreciated.
Thanks!
Julian
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Hoff Hoffman
*nix forums Guru
Joined: 22 Jul 2005
Posts: 572
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| Posted: Wed Jul 19, 2006 3:24 am Post subject:
Re: DYNDNS client for OpenVMS?
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Julian Wolfe wrote:
| Quote: | I'm looking at putting my Alpha on the front end of my network for my
own general usage and web serving some small sites. Is there a client
around for using the DYNDNS service?
|
I've worked with a D-LINK firewall that appears able to provide that,
and the OpenVMS box can sit in the DMZ. DFL-700, IIRC.
I don't know of a client for this for OpenVMS, however. (But that's
also not something I've particularly sought.) |
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David J. Dachtera
*nix forums Guru Wannabe
Joined: 21 Mar 2006
Posts: 197
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| Posted: Wed Jul 19, 2006 1:44 am Post subject:
Re: DYNDNS client for OpenVMS?
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Julian Wolfe wrote:
| Quote: |
HI there,
I'm looking at putting my Alpha on the front end of my network for my
own general usage and web serving some small sites. Is there a client
around for using the DYNDNS service?
Any help would be appreciated.
Thanks!
Julian
|
I'm using some code posted by Aaron Sakovich called DYNDNS_VMS.COM.
Try Googling this group for it. I don't recall exactly how/where I found
it.
--
David J Dachtera
dba DJE Systems
http://www.djesys.com/
Unofficial OpenVMS Marketing Home Page
http://www.djesys.com/vms/market/
Unofficial Affordable OpenVMS Home Page:
http://www.djesys.com/vms/soho/
Unofficial OpenVMS-IA32 Home Page:
http://www.djesys.com/vms/ia32/
Unofficial OpenVMS Hobbyist Support Page:
http://www.djesys.com/vms/support/ |
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Julian Wolfe
*nix forums beginner
Joined: 11 Jul 2005
Posts: 43
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| Posted: Tue Jul 18, 2006 9:26 pm Post subject:
DYNDNS client for OpenVMS?
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HI there,
I'm looking at putting my Alpha on the front end of my network for my
own general usage and web serving some small sites. Is there a client
around for using the DYNDNS service?
Any help would be appreciated.
Thanks!
Julian |
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