[gentoo-user] Adsl, rp-ppoe and new IP assignment

[gentoo-user] Adsl, rp-ppoe and new IP assignment

[Sean Lester]

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Greetings to the group,
    First, if this is not the first time you've seen this I apologize.
I lost all of my last 24hrs of email.  And, I didn't see this on the
reflectors.  So, I appreciate your patience - thank you.  
 
     I have been running pppoe by roaring penguin for a couple of years
now.  Everything works fine when I bring up the network (my interface
comes up, an ip is assigned, my firewall is configured, and dns2go is
fired up).  This runs  fine as long as my ISP doesn't change my IP
address.  I have a file called ip-up.local in the etc/ppp directory that
coordinates all of this, so I think the if-up.local is working.  
 
Once my ISP changes my IP, my network is hung (meaning I can't get out
and routing is messed up).  If I type "route" I don't have a default
route anymore.  If I run adsl-status, it'll tell me that it's up.
However, I'm not so sure it is.  What I have to do is run adsl-stop,
adsl-start, than the iptables configuration.  What is different here,
then at startup?  Any advice?
 
Thank You
Sean
 

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Re: [gentoo-user] Adsl, rp-ppoe and new IP assignment

[W.Kenworthy]

No easy fix: I wrote a script that checks my ISP's front page using
"GET" every 30 seconds.  When an error occurs, it starts checking the
dhcp assigned via the adsl modem IP address every 5 seconds until it
gets a valid address so it can restart apache, update dyndns, checking
that dhcp hasnt gone wheels up and so on.

The reason to use GET is that itself has not proven very reliable in
picking up that something has changed so dhcp itself needs checking.

Its proven quite a reliable method over time, and the short break in
service is tolerable (and very rarely noticed) for my usage.

BillK


On Wed, 2005-10-26 at 21:01 -0400, Sean Lester wrote:
> Greetings to the group,
>     First, if this is not the first time you've seen this I apologize.
> I lost all of my last 24hrs of email.  And, I didn't see this on the
> reflectors.  So, I appreciate your patience - thank you.  
>  
>      I have been running pppoe by roaring penguin for a couple of
> years now.  Everything works fine when I bring up the network
> (my interface comes up, an ip is assigned, my firewall is configured,
> and dns2go is fired up).  This runs  fine as long as my ISP doesn't
> change my IP address.  I have a file called ip-up.local in the etc/ppp
> directory that coordinates all of this, so I think the if-up.local is
> working.  
>  
> Once my ISP changes my IP, my network is hung (meaning I can't get out
> and routing is messed up).  If I type "route" I don't have a default
> route anymore.  If I run adsl-status, it'll tell me that it's up.
> However, I'm not so sure it is.  What I have to do is run adsl-stop,
> adsl-start, than the iptables configuration.  What is different here,
> then at startup?  Any advice?
>  
> Thank You
> Sean
>  
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[gentoo-user] Re: Adsl, rp-ppoe and new IP assignment

[James]

Sean Lester <SFLester <at> sbcglobal.net> writes:



>     First, if this is not the first time you've seen this I apologize.  
> I lost all of my last 24hrs of email.  

If you use gmane:
http://thread.gmane.org/gmane.linux.gentoo.user
The postings never disappear....


>      I have been running pppoe by roaring penguin for 
> a couple of years now.  Everything works fine when I bring up the network 
> (my interface comes up, an ip is assigned, my firewall is configured, 
> and dns2go is fired up).  This runs  fine as long as my ISP doesn't 
> change my IP address.  I have a file called ip-up.local in the etc/ppp 
> directory that coordinates all of this, so I think the if-up.local is 
> working.  

http://www.akadia.com/services/pppoe_iptables.html <might help>

> Once my ISP changes 
> my IP, my network is hung (meaning I can't get out and routing is messed 
> up).  If I type "route" I don't have a default route anymore.  If 
> I run adsl-status, it'll tell me that it's up.  However, I'm not so sure it 
> is.  What I have to do is run adsl-stop, adsl-start, than the iptables 
> configuration.  What is different here, then at startup?  Any 
> advice?

Well yes and no. I have read hundreds of web pages concerning iptables.
Somewhere I read a detailed explanation about pppoe hanging 
and iptables solutions to that problem. However, I did not bookmark the
page, as I use a single static IP.

If you search (pppoe +iptables) and read long enough, I'm sure you'll 
run across this detailed page, so sorry I did not save the link....


hth,
James

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