Hello Guys,
I have some problem of Twitter log-in. I use a mobile network which is
provided by LGT in Korean.
There is a mobile Twitter log-in page which is provided by LGT as
well.
When I attempt to log-in to Twitter, then the Twitter server sends me
a TCP RST packet.
As I know, LGT uses a proxy server to provide a web access.
Do you guys have any idea?
FYI : I've attached some TCP transactions as below.
[SYN] Browser -> Twitter
Transmission Control Protocol, Src Port: 55432 (55432), Dst Port: http
(80), Seq: 0, Len: 0
Source port: 55432 (55432)
Destination port: http (80)
Sequence number: 0 (relative sequence number)
Header length: 44 bytes
Flags: 0x02 (SYN)
Window size: 65535
Checksum: 0x4ab2 [validation disabled]
Options: (24 bytes)
[SYN,ACK] Twitter -> Browser
Transmission Control Protocol, Src Port: http (80), Dst Port: 55432
(55432), Seq: 0, Ack: 1, Len: 0
Source port: http (80)
Destination port: 55432 (55432)
Sequence number: 0 (relative sequence number)
Acknowledgement number: 1 (relative ack number)
Header length: 24 bytes
Flags: 0x12 (SYN, ACK)
Window size: 18200
Checksum: 0x7ebb [validation disabled]
Options: (4 bytes)
Maximum segment size: 1460 bytes
[TCP Segment of a reassembled PDU] Browser -> Twitter
Transmission Control Protocol, Src Port: 55432 (55432), Dst Port: http
(80), Seq: 1, Ack: 1, Len: 1360
Source port: 55432 (55432)
Destination port: http (80)
Sequence number: 1 (relative sequence number)
Acknowledgement number: 1 (relative ack number)
Header length: 20 bytes
Flags: 0x18 (PSH, ACK)
Window size: 65535
Checksum: 0x9e31 [validation disabled]
TCP segment data (1360 bytes)
[TCP Segment of a reassembled PDU] Browser -> Twitter
Transmission Control Protocol, Src Port: 55432 (55432), Dst Port: http
(80), Seq: 1361, Ack: 1, Len: 257
Source port: 55432 (55432)
Destination port: http (80)
Sequence number: 1361 (relative sequence number)
Acknowledgement number: 1 (relative ack number)
Header length: 20 bytes
Flags: 0x18 (PSH, ACK)
Window size: 65535
Checksum: 0x897d [validation disabled]
TCP segment data (257 bytes)
[RST] Twitter -> Browser
Transmission Control Protocol, Src Port: http (80), Dst Port: 55432
(55432), Seq: 1, Len: 0
Source port: http (80)
Destination port: 55432 (55432)
Sequence number: 1 (relative sequence number)
Acknowledgement number: Broken TCP. The acknowledge field is nonzero
while the ACK flag is not set
Header length: 20 bytes
Flags: 0x04 (RST)
Window size: 65535
Checksum: 0xd84c [validation disabled]
