Seeing odd traffic on port 80 - non HTTP

This is a discussion on Seeing odd traffic on port 80 - non HTTP within the Ethereal Development forums, part of the Networking and Network Related category; I am currently running a guest access network on a linux box and I noticed this morning that I'm ...


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  #1 (permalink)  
Old 03-02-2006
boojew@gmail.com
 
Posts: n/a
Default Seeing odd traffic on port 80 - non HTTP

I am currently running a guest access network on a linux box and I
noticed this morning that I'm seeing very odd traffic traffic on port
80 (it's non-http). While i know who is doing it, I have no way of
contacting this person and it is causing my proxy-server no-end of
grief. Is there any way based on the below output to determine what
application this coming from?

No. Time Source Destination
Protocol Info
1 0.000000 10.255.255.53 82.1.233.239 TCP
4182 > http [FIN, ACK] Seq=0 Ack=0 Win=64512 Len=0

Frame 1 (60 bytes on wire, 60 bytes captured)
Arrival Time: Mar 2, 2006 12:51:10.853501000
Time delta from previous packet: 0.000000000 seconds
Time since reference or first frame: 0.000000000 seconds
Frame Number: 1
Packet Length: 60 bytes
Capture Length: 60 bytes
Protocols in frame: eth:ip:tcp
Ethernet II, Src: WwPcbaTe_d0:e1:6c (00:0f:1f:d0:e1:6c), Dst:
QuantaCo_43:3a:eb (00:c0:9f:43:3a:eb)
Destination: QuantaCo_43:3a:eb (00:c0:9f:43:3a:eb)
Source: WwPcbaTe_d0:e1:6c (00:0f:1f:d0:e1:6c)
Type: IP (0x0800)
Trailer: 1056005046C7
Internet Protocol, Src: 10.255.255.53 (10.255.255.53), Dst:
82.1.233.239 (82.1.233.239)
Version: 4
Header length: 20 bytes
Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00)
0000 00.. = Differentiated Services Codepoint: Default (0x00)
.... ..0. = ECN-Capable Transport (ECT): 0
.... ...0 = ECN-CE: 0
Total Length: 40
Identification: 0x5567 (21863)
Flags: 0x04 (Don't Fragment)
0... = Reserved bit: Not set
.1.. = Don't fragment: Set
..0. = More fragments: Not set
Fragment offset: 0
Time to live: 128
Protocol: TCP (0x06)
Header checksum: 0x5f43 [correct]
Good: True
Bad : False
Source: 10.255.255.53 (10.255.255.53)
Destination: 82.1.233.239 (82.1.233.239)
Transmission Control Protocol, Src Port: 4182 (4182), Dst Port: http
(80), Seq: 0, Ack: 0, Len: 0
Source port: 4182 (4182)
Destination port: http (80)
Sequence number: 0 (relative sequence number)
Acknowledgement number: 0 (relative ack number)
Header length: 20 bytes
Flags: 0x0011 (FIN, ACK)
0... .... = Congestion Window Reduced (CWR): Not set
.0.. .... = ECN-Echo: Not set
..0. .... = Urgent: Not set
...1 .... = Acknowledgment: Set
.... 0... = Push: Not set
.... .0.. = Reset: Not set
.... ..0. = Syn: Not set
.... ...1 = Fin: Set
Window size: 64512
Checksum: 0xe470 [correct]

No. Time Source Destination
Protocol Info
2 0.000058 10.255.255.53 61.177.35.58 TCP
4184 > http [FIN, ACK] Seq=0 Ack=0 Win=64512 Len=0

Frame 2 (60 bytes on wire, 60 bytes captured)
Arrival Time: Mar 2, 2006 12:51:10.853559000
Time delta from previous packet: 0.000058000 seconds
Time since reference or first frame: 0.000058000 seconds
Frame Number: 2
Packet Length: 60 bytes
Capture Length: 60 bytes
Protocols in frame: eth:ip:tcp
Ethernet II, Src: WwPcbaTe_d0:e1:6c (00:0f:1f:d0:e1:6c), Dst:
QuantaCo_43:3a:eb (00:c0:9f:43:3a:eb)
Destination: QuantaCo_43:3a:eb (00:c0:9f:43:3a:eb)
Source: WwPcbaTe_d0:e1:6c (00:0f:1f:d0:e1:6c)
Type: IP (0x0800)
Trailer: 10580050BBB2
Internet Protocol, Src: 10.255.255.53 (10.255.255.53), Dst:
61.177.35.58 (61.177.35.58)
Version: 4
Header length: 20 bytes
Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00)
0000 00.. = Differentiated Services Codepoint: Default (0x00)
.... ..0. = ECN-Capable Transport (ECT): 0
.... ...0 = ECN-CE: 0
Total Length: 40
Identification: 0x5568 (21864)
Flags: 0x04 (Don't Fragment)
0... = Reserved bit: Not set
.1.. = Don't fragment: Set
..0. = More fragments: Not set
Fragment offset: 0
Time to live: 128
Protocol: TCP (0x06)
Header checksum: 0x3a48 [correct]
Good: True
Bad : False
Source: 10.255.255.53 (10.255.255.53)
Destination: 61.177.35.58 (61.177.35.58)
Transmission Control Protocol, Src Port: 4184 (4184), Dst Port: http
(80), Seq: 0, Ack: 0, Len: 0
Source port: 4184 (4184)
Destination port: http (80)
Sequence number: 0 (relative sequence number)
Acknowledgement number: 0 (relative ack number)
Header length: 20 bytes
Flags: 0x0011 (FIN, ACK)
0... .... = Congestion Window Reduced (CWR): Not set
.0.. .... = ECN-Echo: Not set
..0. .... = Urgent: Not set
...1 .... = Acknowledgment: Set
.... 0... = Push: Not set
.... .0.. = Reset: Not set
.... ..0. = Syn: Not set
.... ...1 = Fin: Set
Window size: 64512
Checksum: 0x1fdb [correct]

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  #2 (permalink)  
Old 03-02-2006
boojew@gmail.com
 
Posts: n/a
Default Re: Seeing odd traffic on port 80 - non HTTP

Forgot to mention, the source is always this user but the destination
is varied
boo...@gmail.com wrote:
> I am currently running a guest access network on a linux box and I
> noticed this morning that I'm seeing very odd traffic traffic on port
> 80 (it's non-http). While i know who is doing it, I have no way of
> contacting this person and it is causing my proxy-server no-end of
> grief. Is there any way based on the below output to determine what
> application this coming from?
>
> No. Time Source Destination
> Protocol Info
> 1 0.000000 10.255.255.53 82.1.233.239 TCP
> 4182 > http [FIN, ACK] Seq=0 Ack=0 Win=64512 Len=0
>
> Frame 1 (60 bytes on wire, 60 bytes captured)
> Arrival Time: Mar 2, 2006 12:51:10.853501000
> Time delta from previous packet: 0.000000000 seconds
> Time since reference or first frame: 0.000000000 seconds
> Frame Number: 1
> Packet Length: 60 bytes
> Capture Length: 60 bytes
> Protocols in frame: eth:ip:tcp
> Ethernet II, Src: WwPcbaTe_d0:e1:6c (00:0f:1f:d0:e1:6c), Dst:
> QuantaCo_43:3a:eb (00:c0:9f:43:3a:eb)
> Destination: QuantaCo_43:3a:eb (00:c0:9f:43:3a:eb)
> Source: WwPcbaTe_d0:e1:6c (00:0f:1f:d0:e1:6c)
> Type: IP (0x0800)
> Trailer: 1056005046C7
> Internet Protocol, Src: 10.255.255.53 (10.255.255.53), Dst:
> 82.1.233.239 (82.1.233.239)
> Version: 4
> Header length: 20 bytes
> Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00)
> 0000 00.. = Differentiated Services Codepoint: Default (0x00)
> .... ..0. = ECN-Capable Transport (ECT): 0
> .... ...0 = ECN-CE: 0
> Total Length: 40
> Identification: 0x5567 (21863)
> Flags: 0x04 (Don't Fragment)
> 0... = Reserved bit: Not set
> .1.. = Don't fragment: Set
> ..0. = More fragments: Not set
> Fragment offset: 0
> Time to live: 128
> Protocol: TCP (0x06)
> Header checksum: 0x5f43 [correct]
> Good: True
> Bad : False
> Source: 10.255.255.53 (10.255.255.53)
> Destination: 82.1.233.239 (82.1.233.239)
> Transmission Control Protocol, Src Port: 4182 (4182), Dst Port: http
> (80), Seq: 0, Ack: 0, Len: 0
> Source port: 4182 (4182)
> Destination port: http (80)
> Sequence number: 0 (relative sequence number)
> Acknowledgement number: 0 (relative ack number)
> Header length: 20 bytes
> Flags: 0x0011 (FIN, ACK)
> 0... .... = Congestion Window Reduced (CWR): Not set
> .0.. .... = ECN-Echo: Not set
> ..0. .... = Urgent: Not set
> ...1 .... = Acknowledgment: Set
> .... 0... = Push: Not set
> .... .0.. = Reset: Not set
> .... ..0. = Syn: Not set
> .... ...1 = Fin: Set
> Window size: 64512
> Checksum: 0xe470 [correct]
>
> No. Time Source Destination
> Protocol Info
> 2 0.000058 10.255.255.53 61.177.35.58 TCP
> 4184 > http [FIN, ACK] Seq=0 Ack=0 Win=64512 Len=0
>
> Frame 2 (60 bytes on wire, 60 bytes captured)
> Arrival Time: Mar 2, 2006 12:51:10.853559000
> Time delta from previous packet: 0.000058000 seconds
> Time since reference or first frame: 0.000058000 seconds
> Frame Number: 2
> Packet Length: 60 bytes
> Capture Length: 60 bytes
> Protocols in frame: eth:ip:tcp
> Ethernet II, Src: WwPcbaTe_d0:e1:6c (00:0f:1f:d0:e1:6c), Dst:
> QuantaCo_43:3a:eb (00:c0:9f:43:3a:eb)
> Destination: QuantaCo_43:3a:eb (00:c0:9f:43:3a:eb)
> Source: WwPcbaTe_d0:e1:6c (00:0f:1f:d0:e1:6c)
> Type: IP (0x0800)
> Trailer: 10580050BBB2
> Internet Protocol, Src: 10.255.255.53 (10.255.255.53), Dst:
> 61.177.35.58 (61.177.35.58)
> Version: 4
> Header length: 20 bytes
> Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00)
> 0000 00.. = Differentiated Services Codepoint: Default (0x00)
> .... ..0. = ECN-Capable Transport (ECT): 0
> .... ...0 = ECN-CE: 0
> Total Length: 40
> Identification: 0x5568 (21864)
> Flags: 0x04 (Don't Fragment)
> 0... = Reserved bit: Not set
> .1.. = Don't fragment: Set
> ..0. = More fragments: Not set
> Fragment offset: 0
> Time to live: 128
> Protocol: TCP (0x06)
> Header checksum: 0x3a48 [correct]
> Good: True
> Bad : False
> Source: 10.255.255.53 (10.255.255.53)
> Destination: 61.177.35.58 (61.177.35.58)
> Transmission Control Protocol, Src Port: 4184 (4184), Dst Port: http
> (80), Seq: 0, Ack: 0, Len: 0
> Source port: 4184 (4184)
> Destination port: http (80)
> Sequence number: 0 (relative sequence number)
> Acknowledgement number: 0 (relative ack number)
> Header length: 20 bytes
> Flags: 0x0011 (FIN, ACK)
> 0... .... = Congestion Window Reduced (CWR): Not set
> .0.. .... = ECN-Echo: Not set
> ..0. .... = Urgent: Not set
> ...1 .... = Acknowledgment: Set
> .... 0... = Push: Not set
> .... .0.. = Reset: Not set
> .... ..0. = Syn: Not set
> .... ...1 = Fin: Set
> Window size: 64512
> Checksum: 0x1fdb [correct]


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