Full Disclosure mailing list archives
RE: GPRS/IP-session from Nokia/Symbian mobilephonestays up
From: "Juliao Duartenn (Oblog-Direccao)" <juliao.duartenn () oblog pt>
Date: Mon, 13 Dec 2004 14:18:04 +0000
As stated by the original poster, costs are definitely not the only issue here. One of the main abuse forms for this is depleting the entire provider GPRS IP range. Even though IPv6 is now almost 10 years old, mobile carriers still chose to implement IP over GPRS using IPv4. This, of course, leaves them open to address depletion. And now, will they change? JuliĆ£o
Howdy, I think this is part of the reason why some carriers, suchas T-Mobile,use RFC1918 addresses instead of publically routable IPs.Not here in the Netherlands :-) inetnum: 194.229.200.0 - 194.229.207.255 netname: T-MOBILE-NL descr: t-mobile.nl country: NL admin-c: RM1746-RIPE tech-c: RM1746-RIPE status: ASSIGNED PA mnt-by: NLNET-MNT changed: bartk () NL uu net 20030801 source: RIPE I get an IP-address out of this range on my phone. -- MarcoThey do allow you to specifically request real addresses if you need itfor somethinglike IPSec too. Of course, this is kind of a moot pointwhen they haveunlimited data plans in the US. William Reading Marco Davids (Prive) wrote:Hi, For what it is worth: When my Nokia 6600 (Symbian V7.0s) mobile phone wasconnected to theInternet and an imap-server for some tests the other day,I decided torun a ping to the phone's IP-address (in fact I did annmap -O to thephone first, but that didn't work). After the mail was retrieved I closed theemail-application on the phone.Normally the GPRS-session is terminated in such a case.But not this time,while the pings went on. This time I had to force thesession to go down,which is an option on the phone, luckily. I just neverused it before :-)Later on I tried an SSH-session with the Mocha Telnetapplication from myphone. Same behaviour. After I closed the SSH-applicationand as thepings went on the (expensive) GPRS-session did not terminate as it normally does when there is no incoming icmp traffic. WhenI finishedthe external pings to the phone, the GPRS-session closed by itself. I tried again, this time with a larger packet-size, butthat did not work.Then I tried a flood-ping and that did work. TheGPRS-session stayed upand the GRPS-counters increased dramatically! By this timemy littleexperiments where getting rather pricey for me. Conclusion: Even after the last application that uses IPon the phone isclosed, the GPRS-session stays up as long as there is incoming (icmp)traffic. I am not sure what to think of this, but this seems rather undesirable to me. Do other phones also 'suffer' form this behaviour? This 'feature' can be abused. One could easily be lead tobelieve that theGPRS-session is over, while in reality it is not. I did a quick ping-scan on the IP-range that my phone was in and discovered 355 active, 'pingable', IP-addresses out of2048. I figured itbe better not to start flood-pinging all of them them, butI couldn't helpthinking what would happen if some punk did: many phone'sonline wouldprobably stay online, depending on the number of phonemodels that showthe same behaviour. That would not only generate costs totheir owners,but would probaly also exhaust available IP-addresses for new connections, resulting in some kind of DoS to the GPRS IP-service. Greetings,_______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.netsys.com/full-disclosure-charter.html
_______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.netsys.com/full-disclosure-charter.html
Current thread:
- RE: GPRS/IP-session from Nokia/Symbian mobilephonestays up Juliao Duartenn (Oblog-Direccao) (Dec 13)
- RE: GPRS/IP-session from Nokia/Symbian mobilephonestays up jamie fisher (Dec 14)
- Re: GPRS/IP-session from Nokia/Symbian mobilephonestays up James Tucker (Dec 17)
- RE: GPRS/IP-session from Nokia/Symbian mobilephonestays up jamie fisher (Dec 14)