Hi,
I'm running Stunnel on Linux. It needs to connect to a dynamic IP address (by domain name). The DNS is updated automatically. I noticed that the last time the address changed, Stunnel stopped working. A ping from the machine produced the correct address but Stunnel was using the old one.
Will a reload work?
On 17 Feb 2024 at 19:35, Alastair via stunnel-users wrote:
Date sent: Sat, 17 Feb 2024 19:35:17 -0800 To: [email protected] Subject: [stunnel-users] Dynamic DNS patches" <stunnel-users.stunnel.org> From: Alastair via stunnel-users [email protected] Send reply to: [email protected]
Hi,
I'm running Stunnel on Linux. It needs to connect to a dynamic IP address (by domain name). The DNS is updated automatically. I noticed that the last time the address changed, Stunnel stopped working. A ping from the machine produced the correct address but Stunnel was using the old one.
Will a reload work?
When I've had that issue a systemctl restart stunnel has worked. That assumes you linux is starting it via systemctl. If you are starting it some other way, you would probable have to kill the current stunnel process and then start it again.
Believe it caches the dns address, so that is why it doesn't catch the change.
Options might be to use cron.hourly or cron.daily to restart the stunnel. Issue would be that if having an active stunnel connection going, might cause a problem?
Could probable have a script that checks the ip address to see if it has changed and only have it do a restart if it changed?
Good Luck.
stunnel-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
+------------------------------------------------------------+ Michael D. Setzer II - Computer Science Instructor (Retired) mailto:[email protected] mailto:[email protected] mailto:[email protected] Guam - Where America's Day Begins G4L Disk Imaging Project maintainer http://sourceforge.net/projects/g4l/ +------------------------------------------------------------+
On 2024-02-17 22:11, Michael D. Setzer II via stunnel-users wrote:
On 17 Feb 2024 at 19:35, Alastair via stunnel-users wrote:
Date sent: Sat, 17 Feb 2024 19:35:17 -0800 To: [email protected] Subject: [stunnel-users] Dynamic DNS patches" <stunnel-users.stunnel.org> From: Alastair via stunnel-users [email protected] Send reply to: [email protected]
Hi,
I'm running Stunnel on Linux. It needs to connect to a dynamic IP address (by domain name). The DNS is updated automatically. I noticed that the last time the address changed, Stunnel stopped working. A ping from the machine produced the correct address but Stunnel was using the old one.
Will a reload work?
When I've had that issue a systemctl restart stunnel has worked. That assumes you linux is starting it via systemctl. If you are starting it some other way, you would probable have to kill the current stunnel process and then start it again.
Believe it caches the dns address, so that is why it doesn't catch the change.
Options might be to use cron.hourly or cron.daily to restart the stunnel. Issue would be that if having an active stunnel connection going, might cause a problem?
Could probable have a script that checks the ip address to see if it has changed and only have it do a restart if it changed?
Good Luck.
stunnel-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
+------------------------------------------------------------+ Michael D. Setzer II - Computer Science Instructor (Retired) mailto:[email protected] mailto:[email protected] mailto:[email protected] Guam - Where America's Day Begins G4L Disk Imaging Project maintainer http://sourceforge.net/projects/g4l/ +------------------------------------------------------------+
stunnel-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
Thanks for the reply.
I'm glad to know a restart will take care of the problem. I wonder if a reload would suffice, which might avoid breaking any active connections.
I can write a script to check for changes in the IP address. That should work.
It would be nice if stunnel would automatically re-check the DNS periodically.
On Sat, Feb 17, 2024 at 11:55:18PM -0800, Alastair via stunnel-users wrote:
On 2024-02-17 22:11, Michael D. Setzer II via stunnel-users wrote:
On 17 Feb 2024 at 19:35, Alastair via stunnel-users wrote:
Date sent: Sat, 17 Feb 2024 19:35:17 -0800 To: [email protected] Subject: [stunnel-users] Dynamic DNS patches" <stunnel-users.stunnel.org> From: Alastair via stunnel-users [email protected] Send reply to: [email protected]
Hi,
I'm running Stunnel on Linux. It needs to connect to a dynamic IP address (by domain name). The DNS is updated automatically. I noticed that the last time the address changed, Stunnel stopped working. A ping from the machine produced the correct address but Stunnel was using the old one.
Will a reload work?
When I've had that issue a systemctl restart stunnel has worked. That assumes you linux is starting it via systemctl. If you are starting it some other way, you would probable have to kill the current stunnel process and then start it again.
Believe it caches the dns address, so that is why it doesn't catch the change.
Options might be to use cron.hourly or cron.daily to restart the stunnel. Issue would be that if having an active stunnel connection going, might cause a problem?
Could probable have a script that checks the ip address to see if it has changed and only have it do a restart if it changed?
Thanks for the reply.
I'm glad to know a restart will take care of the problem. I wonder if a reload would suffice, which might avoid breaking any active connections.
I can write a script to check for changes in the IP address. That should work.
It would be nice if stunnel would automatically re-check the DNS periodically.
Could you first check if the "delay" option in the stunnel configuration does what you want?
G'luck, Peter
On 2024-02-18 05:43, Peter Pentchev wrote:
On Sat, Feb 17, 2024 at 11:55:18PM -0800, Alastair via stunnel-users wrote:
On 2024-02-17 22:11, Michael D. Setzer II via stunnel-users wrote:
On 17 Feb 2024 at 19:35, Alastair via stunnel-users wrote:
Date sent: Sat, 17 Feb 2024 19:35:17 -0800 To: [email protected] Subject: [stunnel-users] Dynamic DNS patches" <stunnel-users.stunnel.org> From: Alastair via stunnel-users [email protected] Send reply to: [email protected]
Hi,
I'm running Stunnel on Linux. It needs to connect to a dynamic IP address (by domain name). The DNS is updated automatically. I noticed that the last time the address changed, Stunnel stopped working. A ping from the machine produced the correct address but Stunnel was using the old one.
Will a reload work?
When I've had that issue a systemctl restart stunnel has worked. That assumes you linux is starting it via systemctl. If you are starting it some other way, you would probable have to kill the current stunnel process and then start it again.
Believe it caches the dns address, so that is why it doesn't catch the change.
Options might be to use cron.hourly or cron.daily to restart the stunnel. Issue would be that if having an active stunnel connection going, might cause a problem?
Could probable have a script that checks the ip address to see if it has changed and only have it do a restart if it changed?
Thanks for the reply.
I'm glad to know a restart will take care of the problem. I wonder if a reload would suffice, which might avoid breaking any active connections.
I can write a script to check for changes in the IP address. That should work.
It would be nice if stunnel would automatically re-check the DNS periodically.
Could you first check if the "delay" option in the stunnel configuration does what you want?
G'luck, Peter
stunnel-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
Based on the documentation, I would say no, that isn't what I want. However, there is this quote from the link Stewart provided:
" I specifically introduced the "delay" option to deal with dynamic IP addresses. Stunnel does not attempt to cache the IP addresses with "delay = yes". "
That makes it sounds like the "delay" option affects caching and that it would work here.
Does this help.
serverfault.com/questions/567585
Regards
Stewart [email protected] On 18 February 2024 07:56:12 Alastair via stunnel-users [email protected] wrote:
On 2024-02-17 22:11, Michael D. Setzer II via stunnel-users wrote:
On 17 Feb 2024 at 19:35, Alastair via stunnel-users wrote:
Date sent: Sat, 17 Feb 2024 19:35:17 -0800 To: [email protected] Subject: [stunnel-users] Dynamic DNS patches" <stunnel-users.stunnel.org> From: Alastair via stunnel-users [email protected] Send reply to: [email protected]
Hi,
I'm running Stunnel on Linux. It needs to connect to a dynamic IP address (by domain name). The DNS is updated automatically. I noticed that the last time the address changed, Stunnel stopped working. A ping from the machine produced the correct address but Stunnel was using the old one.
Will a reload work?
When I've had that issue a systemctl restart stunnel has worked. That assumes you linux is starting it via systemctl. If you are starting it some other way, you would probable have to kill the current stunnel process and then start it again.
Believe it caches the dns address, so that is why it doesn't catch the change.
Options might be to use cron.hourly or cron.daily to restart the stunnel. Issue would be that if having an active stunnel connection going, might cause a problem?
Could probable have a script that checks the ip address to see if it has changed and only have it do a restart if it changed?
Good Luck.
stunnel-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
+------------------------------------------------------------+ Michael D. Setzer II - Computer Science Instructor (Retired) mailto:[email protected] mailto:[email protected] mailto:[email protected] Guam - Where America's Day Begins G4L Disk Imaging Project maintainer http://sourceforge.net/projects/g4l/ +------------------------------------------------------------+
stunnel-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
Thanks for the reply.
I'm glad to know a restart will take care of the problem. I wonder if a reload would suffice, which might avoid breaking any active connections.
I can write a script to check for changes in the IP address. That should work.
It would be nice if stunnel would automatically re-check the DNS periodically. _______________________________________________ stunnel-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
On 2024-02-18 15:03, Stewart Anderson via stunnel-users wrote:
Does this help.
serverfault.com/questions/567585 [1]
Regards
Stewart [email protected]
On 18 February 2024 07:56:12 Alastair via stunnel-users [email protected] wrote:
On 2024-02-17 22:11, Michael D. Setzer II via stunnel-users wrote: On 17 Feb 2024 at 19:35, Alastair via stunnel-users wrote:
Date sent: Sat, 17 Feb 2024 19:35:17 -0800 To: [email protected] Subject: [stunnel-users] Dynamic DNS patches" <stunnel-users.stunnel.org> From: Alastair via stunnel-users [email protected] Send reply to: [email protected]
Hi,
I'm running Stunnel on Linux. It needs to connect to a dynamic IP address (by domain name). The DNS is updated automatically. I noticed that the last time the address changed, Stunnel stopped working. A ping from the machine produced the correct address but Stunnel was using
the old one.
Will a reload work?
When I've had that issue a systemctl restart stunnel has worked. That assumes you linux is starting it via systemctl. If you are starting it some other way, you would probable have to kill the current stunnel process and then start it again.
Believe it caches the dns address, so that is why it doesn't catch the change.
Options might be to use cron.hourly or cron.daily to restart the stunnel. Issue would be that if having an active stunnel connection going, might cause a problem?
Could probable have a script that checks the ip address to see if it
has changed and only have it do a restart if it changed?
Good Luck.
stunnel-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
+------------------------------------------------------------+ Michael D. Setzer II - Computer Science Instructor (Retired) mailto:[email protected] mailto:[email protected] mailto:[email protected] Guam - Where America's Day Begins G4L Disk Imaging Project maintainer http://sourceforge.net/projects/g4l/ +------------------------------------------------------------+
stunnel-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
Thanks for the reply.
I'm glad to know a restart will take care of the problem. I wonder if a reload would suffice, which might avoid breaking any active connections.
I can write a script to check for changes in the IP address. That should work.
It would be nice if stunnel would automatically re-check the DNS periodically. _______________________________________________ stunnel-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
Links:
[1] http://serverfault.com/questions/567585 _______________________________________________ stunnel-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
Thanks, that helps. The important part seems to be this quote:
" I specifically introduced the "delay" option to deal with dynamic IP addresses. Stunnel does not attempt to cache the IP addresses with "delay = yes". "
That functionality is not clear in the documentation.
-
alstar＠maybenot.work -
Michael D. Setzer II -
Peter Pentchev -
Stewart Anderson