UAMALLOWED and HTTPS (to select.worldpay.com)

Derek C derekchilli at hssl.ie
Wed Apr 29 12:03:38 UTC 2009


Hi Johan,

I just tried again but this time used "tcpdump -vv -i ath0" (on my
notebook) to see if there would be any output differences (not much I
think?) - the error when connecting to https://select.worldpay.com
happened again and the tcp dump shows the output below.

Now I'll get tcpdump running in the router and see what it says and I'll
email it on here too

thanks,

Derek

The final bit of the results of "tcpdump -vv -i ath0": -

13:00:56.397831 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto TCP
(6), length 40) dconn-note.local.36646 > select.worldpay.com.https: R,
cksum 0x61cc (correct), 2240340815:2240340815(0) win 0
13:00:56.398332 IP (tos 0x0, ttl 238, id 2, offset 0, flags [none], proto
TCP (6), length 44) select.worldpay.com.https > dconn-note.local.36647: S,
cksum 0xb4ce (correct), 1305838734:1305838734(0) ack 2232649363 win 8192
<mss 1460>
13:00:56.398364 IP (tos 0x0, ttl 64, id 8194, offset 0, flags [DF], proto
TCP (6), length 40) dconn-note.local.36647 > select.worldpay.com.https: .,
cksum 0xd5bb (correct), 1:1(0) ack 1 win 5840
13:00:56.398650 IP (tos 0x0, ttl 64, id 8195, offset 0, flags [DF], proto
TCP (6), length 121) dconn-note.local.36647 > select.worldpay.com.https: P
1:82(81) ack 1 win 5840
13:00:56.398858 IP (tos 0x0, ttl 238, id 4, offset 0, flags [none], proto
TCP (6), length 44) select.worldpay.com.https > dconn-note.local.36647: S,
cksum 0x94cd (correct), 1305838735:1305838735(0) ack 2232649363 win 16384
<mss 1460>
13:00:56.398877 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto TCP
(6), length 40) dconn-note.local.36647 > select.worldpay.com.https: R,
cksum 0xbefc (correct), 2232649363:2232649363(0) win 0



On Wed, April 29, 2009 10:12 am, Johan Meiring wrote:
> Derek C wrote:
>
>> Hi,
>>
>>
>> On Wed, April 29, 2009 5:35 am, wlanmac wrote:
>>
>>> Try a network trace to see what your browser is doing. Perhaps it's
>>> trying to verify the SSL certificate and can't.
>>
>> What surprised me was that I also wasn't able to "telnet
>> select.worldpay.com 443" on my notebook when connected to the choova
>> chilli Hotspot AP where, normally, I can.
>>
>> I did run tcpdump on my notebook just now.  The last few entries before
>>  the browser fails are listed below.  I've also pasted the entries
>> where I try to telnet too.
>>
>> tcpdump for browser connection/failure to https://select.worldpay.com:
>> -
>>
>>
>> 08:46:04.956305 IP dconn-note.local.51952 > select.worldpay.com.https:
>> .
>> ack 1 win 5840 08:46:04.956387 IP select.worldpay.com.https >
>> dconn-note.local.51952: S
>> 648149975:648149975(0) ack 2976147220 win 16384 <mss 1460>
>> 08:46:04.956414 IP dconn-note.local.51952 > select.worldpay.com.https: R
>>  2976147220:2976147220(0) win 0
>>
>>
>>
>> tcpdump for attempted telnet connection & failure to
>> select.worldpay.com port 443:
>>
>> 08:50:18.635365 IP dconn-note.local.33232 > select.worldpay.com.https:
>> .
>> ack 1 win 5840 08:50:18.636952 IP select.worldpay.com.https >
>> dconn-note.local.33232: S
>> 655972565:655972565(0) ack 2667401140 win 16384 <mss 1460>
>> 08:50:18.636991 IP dconn-note.local.33232 > select.worldpay.com.https: R
>>  2667401140:2667401140(0) win 0
>>
>>
>>
>>
>> Derek
>>
>>
>>
>
> Please also post your tcpdump command line.
>
>
> --
>
>
>
> Johan Meiring
> Amobia Communications
> Tel: (0861) AMOBIA / (0861) 266242
> Fax: (0861) AMOFAX / (0861) 266329
>
>
>
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-- 
Derek C
In Ireland




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