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fail to work after some random time

 
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daniel



Joined: 13 Mar 2023
Posts: 2
PostPosted: Fri Mar 17, 2023 5:53 am    Post subject: fail to work after some random time Reply with quote
I am using upnpc to open ports for cctv applications on a raspberry pi.

The raspberry pi shows the two upnp entries in "upnpc -L" command. However we discover that after some time, it will fail to work. Port scanner scans as closed although the entries are still in list.

From what i understand about the ttl and keepalive, it is happening between the client and the router (IGD) itself. I have kept the default settings and didnt change any. Is my understanding wrong?

Anyone encounters such scenarios before?
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miniupnp
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Joined: 14 Apr 2007
Posts: 1598
PostPosted: Sat Mar 25, 2023 10:16 pm    Post subject: Reply with quote
No one would be able to help you without more details.
The Raspberry pi is the client, but what is the router ?
which IGD implementation is it using ?
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tonosgratisorg



Joined: 09 Feb 2026
Posts: 1
PostPosted: Mon Feb 09, 2026 3:02 pm    Post subject: Reply with quote
thank you
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ginekio



Joined: 03 Jun 2026
Posts: 2
Location: New York
PostPosted: Wed Jun 03, 2026 2:36 am    Post subject: Reply with quote
For IP packets, TTL is carried in the packet itself and is decremented by each router the packet traverses. It is not specific to just the client and the IGD.
retro bowl
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