Failed Connection Requests

Tue May 10 13:03:12 EDT 2016

Hello all,

I am trying to figure out why my getParameterValues API call, using 
&connection_request in the URL, never returns a live response, but it 
always queued.

I've observed the traffic with tcpdump, and there are some "HTTP Not 
Found" messages in there, but I just don't know how to interpret this 
data.

I would be super appreciative of anyone who could look at this tcpdump 
output, and help me decipher what is going on.  Thanks!

tcpdump: listening on any, link-type LINUX_SLL (Linux cooked), capture 
size 65535 bytes
10:52:22.188661 IP (tos 0x0, ttl 64, id 5015, offset 0, flags [DF], 
proto TCP (6), length 60)
     block-208.123.195.136.montanasat.net.42514 > 
block-216.211.179.18.montanasat.net.cwmp: Flags [S], cksum 0x2019 
(incorrect -> 0x91cf), seq 2391372407, win 29200, options [mss 
1460,sackOK,TS val 4257636832 ecr 0,nop,wscale 7], length 0
E..<.. at .@..;.{.........{..rw......r. ..........
..a.........................
10:52:22.205984 IP (tos 0x0, ttl 62, id 0, offset 0, flags [DF], proto 
TCP (6), length 60)
     block-216.211.179.18.montanasat.net.cwmp > 
block-208.123.195.136.montanasat.net.42514: Flags [S.], cksum 0x4815 
(correct), seq 3252037013, ack 2391372408, win 5792, options [mss 
1460,sackOK,TS val 703913 ecr 4257636832,nop,wscale 1], length 0
E..<.. at .>........{...{....%...rx....H..........
.
....a.....................
10:52:22.206024 IP (tos 0x0, ttl 64, id 5016, offset 0, flags [DF], 
proto TCP (6), length 52)
     block-208.123.195.136.montanasat.net.42514 > 
block-216.211.179.18.montanasat.net.cwmp: Flags [.], cksum 0x2011 
(incorrect -> 0x8c85), seq 1, ack 1, win 229, options [nop,nop,TS val 
4257636849 ecr 703913], length 0
E..4.. at .@..B.{.........{..rx..%..... ......
..a..
..................
10:52:22.206191 IP (tos 0x0, ttl 64, id 5017, offset 0, flags [DF], 
proto TCP (6), length 121)
     block-208.123.195.136.montanasat.net.42514 > 
block-216.211.179.18.montanasat.net.cwmp: Flags [P.], cksum 0x2056 
(incorrect -> 0x5998), seq 1:70, ack 1, win 229, options [nop,nop,TS val 
4257636849 ecr 703913], length 69
E..y.. at .@....{.........{..rx..%..... V.....
..a..
..GET / HTTP/1.1
Host: 216.211.179.18:7547
Connection: keep-alive

................
10:52:22.221868 IP (tos 0x0, ttl 62, id 38972, offset 0, flags [DF], 
proto TCP (6), length 52)
     block-216.211.179.18.montanasat.net.cwmp > 
block-208.123.195.136.montanasat.net.42514: Flags [.], cksum 0x81d4 
(correct), seq 1, ack 70, win 2896, options [nop,nop,TS val 703914 ecr 
4257636849], length 0
E..4.<@.>........{...{....%...r....P.......
.
....a.................
10:52:22.357701 IP (tos 0x0, ttl 62, id 38973, offset 0, flags [DF], 
proto TCP (6), length 169)
     block-216.211.179.18.montanasat.net.cwmp > 
block-208.123.195.136.montanasat.net.42514: Flags [P.], cksum 0xa97b 
(correct), seq 1:118, ack 70, win 2896, options [nop,nop,TS val 703928 
ecr 4257636849], length 117
E....=@.>..'.....{...{....%...r....P.{.....
.
....a.HTTP/1.1 404 Not Found
Content-Type: text/html
Transfer-Encoding: chunked
Server: RomPager/4.07 UPnP/1.0
EXT:

................
10:52:22.357754 IP (tos 0x0, ttl 64, id 5018, offset 0, flags [DF], 
proto TCP (6), length 52)
     block-208.123.195.136.montanasat.net.42514 > 
block-216.211.179.18.montanasat.net.cwmp: Flags [.], cksum 0x2011 
(incorrect -> 0x8b24), seq 70, ack 118, win 229, options [nop,nop,TS val 
4257637001 ecr 703928], length 0
E..4.. at .@.. at .{.........{..r...&..... ......
..b..
..................
10:52:22.428262 IP (tos 0x0, ttl 62, id 38974, offset 0, flags [DF], 
proto TCP (6), length 262)
     block-216.211.179.18.montanasat.net.cwmp > 
block-208.123.195.136.montanasat.net.42514: Flags [P.], cksum 0xf55d 
(correct), seq 118:328, ack 70, win 2896, options [nop,nop,TS val 703935 
ecr 4257637001], length 210
E....>@.>........{...{....&...r....P.].....
.
....b.0c6
<html>
<head>
<title>Object Not Found</title></head><body>
<h1>Object Not Found</h1>The requested URL '/' was not found on the 
RomPager server.<p>Return to <A HREF="">last page</A><p>
</body></html>
0

................
10:52:22.428301 IP (tos 0x0, ttl 64, id 5019, offset 0, flags [DF], 
proto TCP (6), length 52)
     block-208.123.195.136.montanasat.net.42514 > 
block-216.211.179.18.montanasat.net.cwmp: Flags [.], cksum 0x2011 
(incorrect -> 0x89fd), seq 70, ack 328, win 237, options [nop,nop,TS val 
4257637071 ecr 703935], length 0
E..4.. at .@..?.{.........{..r...&..... ......
..b..
..................
10:52:22.428669 IP (tos 0x0, ttl 64, id 5020, offset 0, flags [DF], 
proto TCP (6), length 52)
     block-208.123.195.136.montanasat.net.42514 > 
block-216.211.179.18.montanasat.net.cwmp: Flags [F.], cksum 0x2011 
(incorrect -> 0x89fb), seq 70, ack 328, win 237, options [nop,nop,TS val 
4257637072 ecr 703935], length 0
E..4.. at .@..>.{.........{..r...&..... ......
..b..
..................
10:52:22.489109 IP (tos 0x0, ttl 62, id 38975, offset 0, flags [DF], 
proto TCP (6), length 52)
     block-216.211.179.18.montanasat.net.cwmp > 
block-208.123.195.136.montanasat.net.42514: Flags [.], cksum 0x7f92 
(correct), seq 328, ack 71, win 2896, options [nop,nop,TS val 703941 ecr 
4257637072], length 0
E..4.?@.>........{...{....&...r....P.......
.
....b.................
10:52:22.564064 IP (tos 0x0, ttl 62, id 38976, offset 0, flags [DF], 
proto TCP (6), length 52)
     block-216.211.179.18.montanasat.net.cwmp > 
block-208.123.195.136.montanasat.net.42514: Flags [F.], cksum 0x7f89 
(correct), seq 328, ack 71, win 2896, options [nop,nop,TS val 703949 ecr 
4257637072], length 0
E..4.@@.>........{...{....&...r....P.......
.
....b.................
10:52:22.564111 IP (tos 0x0, ttl 64, id 18243, offset 0, flags [DF], 
proto TCP (6), length 52)
     block-208.123.195.136.montanasat.net.42514 > 
block-216.211.179.18.montanasat.net.cwmp: Flags [.], cksum 0x8965 
(correct), seq 71, ack 329, win 237, options [nop,nop,TS val 4257637207 
ecr 703949], length 0
E..4GC at .@....{.........{..r...&......e.....
..cW.
..................