One host can't connect to the dev instance

[eolmstead]

I have a dev instance setup and I can connect to it from multiple different hosts in our network, except the one I am doing development on. 

$ openssl s_client -connect dev########.service-now.com:443 --state
CONNECTED(00000003)
SSL_connect:before SSL initialization
SSL_connect:SSLv3/TLS write client hello
SSL_connect:error in SSLv3/TLS write client hello
write:errno=104 #                                                        # 104 is ECONNRESET for "Connection reset by peer"
---

Is there a place I can go to unblock the IP or find out why the remote is disconnecting?

[-O-]

What do you get if you add -msg?

It should show the negotiated protocol version in clear text.

[eolmstead]

$ openssl s_client -connect dev####.service-now.com:443 --state -tls1_2 -msg
CONNECTED(00000003)
SSL_connect:before SSL initialization
>>> ??? [length 0005]
16 03 01 00 df
>>> TLS 1.2, Handshake [length 00df], ClientHello
01 00 00 db 03 03 d2 43 8a e2 b7 51 10 e8 d3 8c
bc fc 42 1d 47 8a f2 be c8 7d e1 e4 07 bf eb 28
aa cd 1d 6c 3d 4c 00 00 38 c0 2c c0 30 00 9f cc
a9 cc a8 cc aa c0 2b c0 2f 00 9e c0 24 c0 28 00
6b c0 23 c0 27 00 67 c0 0a c0 14 00 39 c0 09 c0
13 00 33 00 9d 00 9c 00 3d 00 3c 00 35 00 2f 00
ff 01 00 00 7a 00 00 00 1e 00 1c 00 00 19 64 65
76 31 34 32 30 34 33 2e 73 65 72 76 69 63 65 2d
6e 6f 77 2e 63 6f 6d 00 0b 00 04 03 00 01 02 00
0a 00 0c 00 0a 00 1d 00 17 00 1e 00 19 00 18 00
23 00 00 00 16 00 00 00 17 00 00 00 0d 00 30 00
2e 04 03 05 03 06 03 08 07 08 08 08 09 08 0a 08
0b 08 04 08 05 08 06 04 01 05 01 06 01 03 03 02
03 03 01 02 01 03 02 02 02 04 02 05 02 06 02
SSL_connect:SSLv3/TLS write client hello
SSL_connect:error in SSLv3/TLS write client hello
write:errno=104
---

[-O-]

That looks OK.
So I guess it is either the host or the network - can't help there.

[eolmstead · Accepted solution]

It turns out there was a firewall issue in our local network. The problem is now resolved.