edmidor
6th Kyu
join:2008-05-19
Montreal, QC
| [Equipment] ATA cannot register after ISP updates public dynamic
Here’s the problem: ATA behind a router registered to SIP proxy, everything works perfectly.
Now ISP updates the public IP – router looses connection for a second, and reconnects, obtaining a new IP from ISP’s DHCP server.
After that ATA can’t renew registration displaying message “Can’t connect to the server”. Reboot ATA doesn’t help – problem is apparently in the router. Reboot router – and, viola, ATA successfully re-registers and from there it’s business as usual – until next IP update.
I’m trying to think of some automatic workaround… If anyone has enough understanding of networking to explain what’s going on behind the scenes that would be great. |
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im_chandave
join:2005-07-28
Cleveland, OH
| Re: [Equipment] ATA cannot register after ISP updates public dyn
This might be the same issue with Tomato as Dixit  had in this thread.
See ya...
d.c. |
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edmidor
6th Kyu
join:2008-05-19
Montreal, QC
| It led me to there
»www.linksysinfo.org/forums/forum···hp?f=160
There are some knowledgeable guys there, hope someone can suggest a simple script to reboot a router automatically on public IP change. |
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priller
join:2000-10-20
Gainesville, VA | reply to edmidor
I'm really mystified about why an ISP would be handing out a different IP address at each DHCP renewal. This is not common by any means. Who's doing this? |
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edmidor
6th Kyu
join:2008-05-19
Montreal, QC
| No, of course not on each renewal. iptables go wild on actual IP change, I'm not even sure it happens every single time.
But thinking of workaround I assumed it's easier to catch renewal event and reboot/flash even when it's not necessary, then to catch it only when public IP actually changed. Right I am or not, I still can't write such a script for Tomato myself... |
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im_chandave
join:2005-07-28
Cleveland, OH
| reply to priller
AT&T (formerly SBC, formerly, Ameritech) assigns a new IP if you loose sync on your DSL modem. Also, if your modem get connected to the backup redback, AT&T tries to bump you back to the primary...also resulting in an IP change.
See ya...
d.c. |
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christcorp
Premium
join:2001-05-21
Cheyenne, WY
 ·Bresnan Online
 ·VOIPo
| reply to edmidor
Question; I assume that the "Router" you speak of is a combo DSL/Cable modem with a router built in? If not, then I assume that the dsl/cable modem is connected to your router. If so, does your DSL/Cable modem have a built in router. (Most do). If so, are you bridging so the public IP (The one that keeps changing) is bridged into your stand a lone router which you are authenticating via PPPOE? If so, have you tried letting the DSL/Cable modem with built in router do the authenticating for you and have it pass on a PRIVATE IP address; e.g. 192.168.0.2 on to your stand a lone router? Then, you could set your stand a lone router for a STATIC IP address of 192.168.0.2 or whatever is applicable and when the combo modem/router disconnects/reconnects it will be forced for an IP address by your stand a lone router because it is set for a static.
In other words, there are a lot of options here, but I/we need more information. I.e. when the NEW IP address is given by the ISP and things go crazy, do you also lose INTERNET connection to your PC until you reboot the router?????? Lot of questions. Thx... Mike.... |
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edmidor
6th Kyu
join:2008-05-19
Montreal, QC | No, it's cable modem and WRT54GL with Tomato. |
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christcorp
Premium
join:2001-05-21
Cheyenne, WY | Are you authenticating with the Linksys providing the user name and password? Or, is the cable modem outputting a private IP of 192.168.x.x? If the later; have you tried giving the linksys a STATIC IP from the cable modem? |
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edmidor
6th Kyu
join:2008-05-19
Montreal, QC
| said by christcorp :Are you authenticating with the Linksys providing the user name and password? Or, is the cable modem outputting a private IP of 192.168.x.x? If the later; have you tried giving the linksys a STATIC IP from the cable modem? It's a regular cable modem, no built-in router, so Linksys gets a dynamic public IP from it. It cannot be static simply because it's dynamic. |
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christcorp
Premium
join:2001-05-21
Cheyenne, WY
·Bresnan Online
·VOIPo
| You are correct. With that type of configuration you can't tell the router to go static. You could call your cable company; complain about your network router locking up every time the IP address changes; and see if they will give you a static IP address (For Free) that won't change. Later... Mike... |
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