ftp.rtems.org problems from AWS

Mon Jan 18 03:06:52 UTC 2016

Hi all,

I'm trying to use the source builder, and I'm having a very weird problem with the ftp.rtems.org server. I can perfectly repeatably fail to complete an SSL handshake from an AWS instance. It just ... hangs. I have no problems connecting to any other SSL service, and I only have problems from within AWS instances. It's not a TCP problem, as I can successfully get HTTP 302 responses when I try to request things via HTTP.

This is entirely stopping me from using RTEMS, since I can't actually get a development environment built. Anyone have any ideas, or know who I can contact?

Thanks,
-Brandon

[ diagnostic information follows ]

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ubuntu at ip-172-31-33-20:~$ ip addr show eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 9001 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 06:18:db:39:9d:6b brd ff:ff:ff:ff:ff:ff
    inet 172.31.33.20/20 brd 172.31.47.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::418:dbff:fe39:9d6b/64 scope link
       valid_lft forever preferred_lft forever
ubuntu at ip-172-31-33-20:~$ nc -vz ftp.rtems.org 443
Connection to ftp.rtems.org 443 port [tcp/https] succeeded!
ubuntu at ip-172-31-33-20:~$ openssl s_client -host ftp.rtems.org -port 443
CONNECTED(00000003)
^C
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I've even gone so far as to explicitly permit all incoming TCP traffic. In fact, I have this problem whether I'm speaking HTTPS or FTP:

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ubuntu at ip-172-31-33-20:~$ ftp ftp.rtems.org
Connected to ftp.rtems.org.
220-Welcome to the RTEMS Project main FTP!
220-
220-This site is available at:
220-
220-  https://ftp.rtems.org/
220-  ftp://ftp.rtems.org/ (TLS)
220-  http://ftp.rtems.org/
220-  ftp://ftp.rtems.org/
220-
220
Name (ftp.rtems.org:ubuntu): anonymous
331 Please specify the password.
Password:
230 Login successful.
Remote system type is UNIX.
Using binary mode to transfer files.
ftp> cd pub/rtems/releases/4.11/4.11.0-rc1/sources/
250 Directory successfully changed.
ftp> passive
Passive mode on.
ftp> ls
227 Entering Passive Mode (140,211,10,151,105,230).
150 Here comes the directory listing.
^C
receive aborted
waiting for remote to finish abort
226 Directory send OK.
225 No transfer to ABOR.
ftp>
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The traceroute:

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ubuntu at ip-172-31-33-20:~$ traceroute ftp.rtems.org
traceroute to ftp.rtems.org (140.211.10.151), 30 hops max, 60 byte packets
 1  ec2-50-112-0-84.us-west-2.compute.amazonaws.com (50.112.0.84)  1.342 ms ec2-50-112-0-86.us-west-2.compute.amazonaws.com (50.112.0.86)  1.331 ms  1.324 ms
 2  100.64.1.187 (100.64.1.187)  1.546 ms 100.64.1.213 (100.64.1.213)  2.191 ms 100.64.1.163 (100.64.1.163)  1.313 ms
 3  100.64.0.144 (100.64.0.144)  1.084 ms 100.64.0.32 (100.64.0.32)  1.288 ms 100.64.0.86 (100.64.0.86)  1.678 ms
 4  100.64.16.15 (100.64.16.15)  0.686 ms 100.64.16.203 (100.64.16.203)  0.693 ms 100.64.16.111 (100.64.16.111)  0.683 ms
 5  54.239.48.184 (54.239.48.184)  0.920 ms 54.239.48.178 (54.239.48.178)  1.429 ms 205.251.232.39 (205.251.232.39)  0.898 ms
 6  205.251.232.160 (205.251.232.160)  1.530 ms 205.251.232.216 (205.251.232.216)  0.703 ms  0.686 ms
 7  205.251.232.89 (205.251.232.89)  8.540 ms 54.239.41.190 (54.239.41.190)  6.895 ms 54.239.41.253 (54.239.41.253)  9.067 ms
 8  52.95.52.162 (52.95.52.162)  11.237 ms 52.95.52.96 (52.95.52.96)  11.811 ms 205.251.232.75 (205.251.232.75)  8.442 ms
 9  52.95.52.81 (52.95.52.81)  6.962 ms 52.95.52.219 (52.95.52.219)  8.703 ms 52.95.52.47 (52.95.52.47)  8.293 ms
10  xe-0-2-0.0.rtr.seat.net.internet2.edu (64.57.30.42)  8.338 ms  7.101 ms xe-0-2-1.0.rtr.seat.net.internet2.edu (64.57.30.44)  6.832 ms
11  198.32.165.32 (198.32.165.32)  11.151 ms  11.227 ms 52.95.52.47 (52.95.52.47)  7.441 ms
12  corv-car1-gw.nero.net (207.98.64.39)  12.739 ms  13.949 ms xe-0-2-0.0.rtr.seat.net.internet2.edu (64.57.30.42)  8.070 ms
13  ftp.rtems.org (140.211.10.151)  12.810 ms  14.079 ms  14.073 ms
ubuntu at ip-172-31-33-20:~$
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