[Modem] Motorola 2210 doesn't respond to ping in AT&T West http://www.dslreports.com/forum/r22625801 en Thu, 10 Dec 2009 14:26:28 EDT Thu, 10 Dec 2009 14:26:28 EDT Re: [Modem] Motorola 2210 doesn't respond to ping http://www.dslreports.com/forum/remark,22708364 wayjac : Setting the modem to block pings is just a strange strange move I don't think att was aware of this or any of the other strange things about the way the motorola works

I've seen a rant before this is not one ]]> http://www.dslreports.com/forum/remark,22708364 Tue, 14 Jul 2009 19:24:04 EDT Re: [Modem] Motorola 2210 doesn't respond to ping http://www.dslreports.com/forum/remark,22708242 jfeise :
said by wayjac See Profile :

If you set a long lease time on the public ip and your normally "months" long lease is short the client could hang on to the old lease for half of its time

Sure. That's why I said, some people know how to use release and renew. I can always just release the lease on the client and get a new one. Granted, people who don't know much about dhcp could have issues. But that's not a reason to keep people who know this stuff from changing it.
I mean, I've been on the phone with support at AT&T for over an hour to try to find a way around the ping issue (and having to sit through all the level 1 scripts of "have you rebooted the modem" etc.) An option like in the 2-Wire firmware in the Motorola firmware would have avoided all that.
Sorry, I noticed this has ended up more like a rant than anything else...
I can live with the short dhcp lease, I just have set my dhcp client to not log things, because it fills up my log files too much.]]> http://www.dslreports.com/forum/remark,22708242 Tue, 14 Jul 2009 18:55:29 EDT Re: [Modem] Motorola 2210 doesn't respond to ping http://www.dslreports.com/forum/remark,22707965 wayjac :
said by jfeise See Profile :

That comment was about the public IP. The machine, when starting back up, picked up the same public IP as before, even though the 10 minute lease was long up, because the machine was down for 1/2 day. Now I know that with DHCP, the client can ask for the same IP, although it is no guarantee. Maybe that's what happened.
That sounds normal to me

The speedstreams depending on the software versions have a default lease time of 10 minutes or 24 hours
The isp has a ip lease time but the modem also has its own lease time
If you set a long lease time on the public ip and your normally "months" long lease is short the client could hang on to the old lease for half of its time
]]> http://www.dslreports.com/forum/remark,22707965 Tue, 14 Jul 2009 17:56:21 EDT Re: [Modem] Motorola 2210 doesn't respond to ping http://www.dslreports.com/forum/remark,22707721 jfeise :
said by wayjac See Profile :

With the public ip you would want a short lease time because the public ip is subject to change at any time. Once a dhcp client gets a lease on a ip it going to use it until its "time" to change even if the isp changes the ip address
Well, sure, the server determines the lease time. But practically, my ip address only changes when there is a power outage (or they reboot the dhcp server.) I have kept the same ip address for months sometimes.
And the Speedstream 4100 as well as the Motorola 2210 have fields to change the lease time. It has never been too clear to me if that's only for the private ip (which I never used in the first place with these modems.)
I also remember that when I used the Speedstream, I would see lease renewal times of around 7K seconds, instead of the 300 seconds I see in my logs now. Whatever voodoo they do on the server side, I guess...

Interestingly, they seem to have a rather generous grace period. I had the machine offline for 1/2 day or so for maintenance, and got the same IP address when I went back online.
You could be commenting on the public or the private ip address?
That comment was about the public IP. The machine, when starting back up, picked up the same public IP as before, even though the 10 minute lease was long up, because the machine was down for 1/2 day. Now I know that with DHCP, the client can ask for the same IP, although it is no guarantee. Maybe that's what happened.]]> http://www.dslreports.com/forum/remark,22707721 Tue, 14 Jul 2009 17:07:50 EDT Re: [Modem] Motorola 2210 doesn't respond to ping http://www.dslreports.com/forum/remark,22707640 wayjac :
said by jfeise See Profile :

I can see the use of the short lease time if the modem or their hardware lose power. But I still should be able to change the lease time, since it doesn't seem to even matter much to upstream. And some people know how to do a /release and /renew...
With the public ip you would want a short lease time because the public ip is subject to change at any time. Once a dhcp client gets a lease on a ip it going to use it until its "time" to change even if the isp changes the ip address
said by jfeise See Profile :

Interestingly, they seem to have a rather generous grace period. I had the machine offline for 1/2 day or so for maintenance, and got the same IP address when I went back online.
You could be commenting on the public or the private ip address?]]> http://www.dslreports.com/forum/remark,22707640 Tue, 14 Jul 2009 16:50:31 EDT Re: [Modem] Motorola 2210 doesn't respond to ping http://www.dslreports.com/forum/remark,22703582 jfeise :
said by wayjac See Profile :

I don't think you'll find a way to change the public ip lease time, the speedstreams and the motorola also use a 10 minute lease time for the public ip address
Interestingly, they seem to have a rather generous grace period. I had the machine offline for 1/2 day or so for maintenance, and got the same IP address when I went back online.
I can see the use of the short lease time if the modem or their hardware lose power. But I still should be able to change the lease time, since it doesn't seem to even matter much to upstream. And some people know how to do a /release and /renew...]]> http://www.dslreports.com/forum/remark,22703582 Mon, 13 Jul 2009 23:45:20 EDT Re: [Modem] Motorola 2210 doesn't respond to ping http://www.dslreports.com/forum/remark,22675163 wayjac :
said by jfeise See Profile :

It has a checkbox to disable ping responses (which I have not checked, of course), and the public IP address can be assigned to one local machine, and the lease renewal time is about 5 minutes, I haven't found a setting to change that for the public IP address
I don't think you'll find a way to change the public ip lease time, the speedstreams and the motorola also use a 10 minute lease time for the public ip address]]> http://www.dslreports.com/forum/remark,22675163 Wed, 08 Jul 2009 17:19:15 EDT Re: [Modem] Motorola 2210 doesn't respond to ping http://www.dslreports.com/forum/remark,22671240 jfeise : Just an update:
I got a 2-Wire 2701 now (there are a bunch of them on eBay), and it indeed does what I need.
It has a checkbox to disable ping responses (which I have not checked, of course), and the public IP address can be assigned to one local machine, and the lease renewal time is about 5 minutes, I haven't found a setting to change that for the public IP address, though. For the local 192.168.1.x addresses it can be set. I may have not yet looked enough,though, since FedEx just delivered the box an hour ago...]]> http://www.dslreports.com/forum/remark,22671240 Wed, 08 Jul 2009 01:20:45 EDT Re: [Modem] Motorola 2210 doesn't respond to ping http://www.dslreports.com/forum/remark,22640264 wayjac :
said by jfeise See Profile :

Another modem I tried was a D-Link 2320B. Ping worked, and it gave the WAN IP to the local computer, but with a DHCP lease renewal time of 15 seconds, not changeable of course...
A 15 second lease time means the client is always renewing the lease.........not a good thing
said by jfeise See Profile :

All I need is a DSL modem that lets all packets through, and allows me to get the WAN IP address on the local computer, with a reasonable DHCP lease time.
Not too much to ask, I think ;-)
I hope you're able to find what you need]]> http://www.dslreports.com/forum/remark,22640264 Wed, 01 Jul 2009 14:57:39 EDT Re: [Modem] Motorola 2210 doesn't respond to ping http://www.dslreports.com/forum/remark,22636971 jfeise :
said by wayjac See Profile :

So.....the speedstream 4100 only blocks outbound IPv6 packets

The motorola 2210 blocks icmp pings
The Speedstream blocks outbound IPv6 packets encapsulated in IPv4. I didn't even try to send IPv6 directly...
But it let inbound tunneled IPv6 packets through, as tcpdump showed.

Another modem I tried was a D-Link 2320B. Ping worked, and it gave the WAN IP to the local computer, but with a DHCP lease renewal time of 15 seconds, not changeable of course...

All I need is a DSL modem that lets all packets through, and allows me to get the WAN IP address on the local computer, with a reasonable DHCP lease time.
Not too much to ask, I think ;-)]]> http://www.dslreports.com/forum/remark,22636971 Tue, 30 Jun 2009 21:05:19 EDT Re: [Modem] Motorola 2210 doesn't respond to ping http://www.dslreports.com/forum/remark,22636780 wayjac : So.....the speedstream 4100 only blocks outbound IPv6 packets

The motorola 2210 blocks icmp pings]]> http://www.dslreports.com/forum/remark,22636780 Tue, 30 Jun 2009 20:22:29 EDT Re: [Modem] Motorola 2210 doesn't respond to ping http://www.dslreports.com/forum/remark,22636732 jfeise :
said by wayjac See Profile :

Why is the ping so important to you
That also has to do with IPv6. HE's IPv6 tunnelbroker (»www.tunnelbroker.net/) tries to ping the IPv4 address to verify the tunnel.]]> http://www.dslreports.com/forum/remark,22636732 Tue, 30 Jun 2009 20:08:57 EDT Re: [Modem] Motorola 2210 doesn't respond to ping http://www.dslreports.com/forum/remark,22636694 wayjac : Why is the ping so important to you]]> http://www.dslreports.com/forum/remark,22636694 Tue, 30 Jun 2009 20:00:47 EDT Re: [Modem] Motorola 2210 doesn't respond to ping http://www.dslreports.com/forum/remark,22636469 jfeise :
said by wayjac See Profile :

You should also consider a used speedstream 5100b, 4100 or 4100b dsl modem one may be a better fit
Well, I still have a Speedstream 4100. That started the whole issue, because the Speedstream doesn't let outbound tunneled IPv6 packets through. The Motorola does.]]> http://www.dslreports.com/forum/remark,22636469 Tue, 30 Jun 2009 19:13:48 EDT Re: [Modem] Motorola 2210 doesn't respond to ping http://www.dslreports.com/forum/remark,22636446 wayjac :
said by jfeise See Profile :

It didn't give the public IP address to the computer. It kept renewing the 192.168.1.64 address all the time.
If you did a release....renew ip address on the computer after setting the modem to ip passthrough/dmz configuration....getting the private ip address is a problem

said by jfeise See Profile :

While the bellsouth interface has more options, I didn't see anything ping or ICMP related.
Yea.... I think its in there somewhere its just not obvious
said by jfeise See Profile :

Looks like it fits my requirements then. I won't use the wireless, though, since I already have an internal wireless WPA setup.
You should also consider a used speedstream 5100b, 4100 or 4100b dsl modem one may be a better fit]]> http://www.dslreports.com/forum/remark,22636446 Tue, 30 Jun 2009 19:09:12 EDT Re: [Modem] Motorola 2210 doesn't respond to ping http://www.dslreports.com/forum/remark,22636251 jfeise :
said by wayjac See Profile :

The "bellsouth" user interface displays more if not all of the router options.
It may be that the setting you need is labeled with a term other than "ping" and its overlooked
Can you give more details about your "(which has some other issues)" comment
It didn't give the public IP address to the computer. It kept renewing the 192.168.1.64 address all the time. But I was able to get out to another machine on the Net, and try the ping from there.
While the bellsouth interface has more options, I didn't see anything ping or ICMP related.

I think the "bellsouth" gui is your last option before bridge mode or replacing the modem

The 2wire 2701HG-B supports wpa-psk and wpa2-psk authentication it also has a "dmzplus mode" where one computer shares the public ip address
Thanks for the info. Looks like it fits my requirements then. I won't use the wireless, though, since I already have an internal wireless WPA setup.]]> http://www.dslreports.com/forum/remark,22636251 Tue, 30 Jun 2009 18:29:56 EDT Re: [Modem] Motorola 2210 doesn't respond to ping http://www.dslreports.com/forum/remark,22636152 wayjac :
said by jfeise See Profile :

I even tried the 7.7.3r7 Southeast firmware (which has some other issues), but none of them responded to a ping from the outside.
The "bellsouth" user interface displays more if not all of the router options.
It may be that the setting you need is labeled with a term other than "ping" and its overlooked
Can you give more details about your "(which has some other issues)" comment

I think the "bellsouth" gui is your last option before bridge mode or replacing the modem

said by jfeise See Profile :

I talked with level 2 support from AT&T, and the guy recommended a 2-Wire 2701, but that has a router built-in (and useless wireless without WPA), I don't know if the 2-Wire can be set to give one computer on the LAN side the WAN IP address.
The 2wire 2701HG-B supports wpa-psk and wpa2-psk authentication it also has a "dmzplus mode" where one computer shares the public ip address]]> http://www.dslreports.com/forum/remark,22636152 Tue, 30 Jun 2009 18:05:42 EDT Re: [Modem] Motorola 2210 doesn't respond to ping http://www.dslreports.com/forum/remark,22631866 jfeise :
said by wayjac See Profile :

The modem in the other thread has a different software version 7.7.3r5
Well, I tried that firmware as well (downloaded from »att-training.net/firmware.html)
I even tried the 7.7.3r7 Southeast firmware (which has some other issues), but none of them responded to a ping from the outside.

If the modem has been set to drop icmp pings the only workaround is bridge mode

There are some other ways to access the modem when its in bridge mode
As I said, bridge mode is not what I want to do. The last time I did a PPPoE setup on my Linux box was about 10 years ago when I had an ISDN line, and it was a bit of a pain, if I remember right...
Accessing the modem is not the major issue, the major issue is that in bridge mode I can't just connect another computer to the modem (for example, for my testing I just plug my netbook in), I would have to install PPPoE handling on any computer that I want to connect.

I talked with level 2 support from AT&T, and the guy recommended a 2-Wire 2701, but that has a router built-in (and useless wireless without WPA), as far as I can tell. I don't know if the 2-Wire can be set to give one computer on the LAN side the WAN IP address.]]> http://www.dslreports.com/forum/remark,22631866 Tue, 30 Jun 2009 00:18:38 EDT Re: [Modem] Motorola 2210 doesn't respond to ping http://www.dslreports.com/forum/remark,22628775 wayjac :
said by jfeise See Profile :

So, it seems that ICMP is blocked.
Is there a way around that, other than bridge mode (which I don't really want to do)?
The modem in the other thread has a different software version 7.7.3r5 If the modem has been set to drop icmp pings the only workaround is bridge mode

There are some other ways to access the modem when its in bridge mode]]> http://www.dslreports.com/forum/remark,22628775 Mon, 29 Jun 2009 14:15:10 EDT [Modem] Motorola 2210 doesn't respond to ping http://www.dslreports.com/forum/remark,22625801 jfeise : I have a Motorola 2210-02 with AT&T firmware 7.7.5r8.
This is set up with PPPoE on the modem, smart keepalive connection, and the public IP address used by the computer on the LAN.
Everything is set as hexwiz describes here: »Re: Can't ping my IP
Yet, I can not ping the public IP address from any computer on the Internet.
Traceroute works, and I can also ssh into the machine (a linux box.)
So, it seems that ICMP is blocked.
Is there a way around that, other than bridge mode (which I don't really want to do)?]]> http://www.dslreports.com/forum/remark,22625801 Sun, 28 Jun 2009 21:42:21 EDT