> > Above is the output from tcpdump as requested, I'm not quite sure why
> > NAS_ipaddr is reported as 192.168.0.38 - we don't use that address.
>
> You need to add '-s 0' to your tcpdump command. By default, tcpdump
> only gets 52 bytes, which is enough to identify the payload of the packet
> generally. '-s 0' collects the entire packet.

Hi,

Thanks for that pointer Paul. He's a packet I captured using the command
'tcpdump -n -s 0 -X port 1812':


13:13:38.164082 1.2.3.4.6025 > 1.2.3.5.1812:  rad-access-req 128 [id 78]
Attr[  NAS_ipaddr{192.168.0.38} User{8703405062} NAS_port_type{Async}
Calling_station{sip:[EMAIL PROTECTED] [|radius] (DF)
0x0000   4500 009c e47e 4000 4011 7e1d 5190 9a52        [EMAIL PROTECTED]@.~.Q..R
0x0010   5190 9a42 1789 0714 0088 38ce 014e 007a        Q..B......8..N.z
0x0020   eb3c 1a7f 3e7b 5a29 d15e cabb d7be a4a4        .<..>{Z).^......
0x0030   0406 c0a8 0026 010c 3837 3033 3430 3530        .....&..87034050
0x0040   3632 3d06 0000 0000 1f1f 7369 703a 3837        62=.......sip:87
0x0050   3033 3430 3530 3632 4073 6970 2e63 616c        [EMAIL PROTECTED]
0x0060   6c75 6b2e 636f 6d1a 3500 0019 da18 2f68        luk.com.5...../h
0x0070   3332 332d 636f 6e66 2d69 643d 3030 3061        323-conf-id=000a
0x0080   3861 6132 2d33 3133 3430 3064 392d 3230        8aa2-313400d9-20
0x0090   6565 6235 6161 2d34 6536 3338                  eeb5aa-4e638

does it look any better? or has it still got the same problem?

Regards,

Alan


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