So apparently there is a DNS entry for smtp.bluewin.ch, but that is not
the one to use as it was apparently EOLd in 2006 or so. Thanks for
offlist info that it is and this link[1] that describes:
smtpauths.bluewin.ch:465 so TLS only (which is good!)
But, see below, connect with openssl and it drops from Init7, Quickline
but works from BIT.nl...
Anybody similar sightings?
Greets,
Jeroen
[1]
https://www.swisscom.ch/de/privatkunden/hilfe/internet/e-mail-einrichten-reparieren.html#lightbox=sel%3A%5Btarget%3D%22sdxlightbox%22%5D%5Bhref%3D%22%2Fde%2Fprivatkunden%2Fhilfe%2Finternet%2Fe-mail-einrichten-reparieren%2Fserver-einstellungen-overlay.html%22%5D
From quickline:
openssl s_client -connect smtpauths.bluewin.ch:465
CONNECTED(00000003)
depth=2 C = CH, O = SwissSign AG, CN = SwissSign Gold CA - G2
verify return:1
depth=1 C = CH, O = SwissSign AG, CN = SwissSign Server Gold CA 2014 - G22
verify return:1
depth=0 C = CH, ST = Bern, L = Worblaufen, O = Swisscom (Schweiz) AG, OU
= IT, CN = smtpauths.bluewin.ch
verify return:1
140365288952960:error:141A318A:SSL routines:tls_process_ske_dhe:dh key
too small:../ssl/statem/statem_clnt.c:2150:
---
Certificate chain
0 s:C = CH, ST = Bern, L = Worblaufen, O = Swisscom (Schweiz) AG, OU =
IT, CN = smtpauths.bluewin.ch
i:C = CH, O = SwissSign AG, CN = SwissSign Server Gold CA 2014 - G22
1 s:C = CH, O = SwissSign AG, CN = SwissSign Server Gold CA 2014 - G22
i:C = CH, O = SwissSign AG, CN = SwissSign Gold CA - G2
---
Server certificate
-----BEGIN CERTIFICATE-----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RjEyN0Q5OEM4QUUwggF7BgorBgEEAdZ5AgQCBIIBawSCAWcBZQB1AESUZS6w7s6v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==
-----END CERTIFICATE-----
subject=C = CH, ST = Bern, L = Worblaufen, O = Swisscom (Schweiz) AG, OU
= IT, CN = smtpauths.bluewin.ch
issuer=C = CH, O = SwissSign AG, CN = SwissSign Server Gold CA 2014 - G22
---
No client certificate CA names sent
---
SSL handshake has read 4373 bytes and written 319 bytes
Verification: OK
---
New, (NONE), Cipher is (NONE)
Server public key is 2048 bit
Secure Renegotiation IS supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
SSL-Session:
Protocol : TLSv1.2
Cipher : 0000
Session-ID:
4C3B5E25409E722974428474E8275BF0B97C775BEE2F8EE50BADDF9D38372A81
Session-ID-ctx:
Master-Key:
PSK identity: None
PSK identity hint: None
SRP username: None
Start Time: 1615458495
Timeout : 7200 (sec)
Verify return code: 0 (ok)
Extended master secret: no
---
and disconnect...
From Init7:
openssl s_client -connect smtpauths.bluewin.ch:465
CONNECTED(00000003)
depth=2 C = CH, O = SwissSign AG, CN = SwissSign Gold CA - G2
verify return:1
depth=1 C = CH, O = SwissSign AG, CN = SwissSign Server Gold CA 2014 - G22
verify return:1
depth=0 C = CH, ST = Bern, L = Worblaufen, O = Swisscom (Schweiz) AG, OU
= IT, CN = smtpauths.bluewin.ch
verify return:1
140701644072256:error:141A318A:SSL routines:tls_process_ske_dhe:dh key
too small:../ssl/statem/statem_clnt.c:2156:
---
Certificate chain
0 s:C = CH, ST = Bern, L = Worblaufen, O = Swisscom (Schweiz) AG, OU =
IT, CN = smtpauths.bluewin.ch
i:C = CH, O = SwissSign AG, CN = SwissSign Server Gold CA 2014 - G22
1 s:C = CH, O = SwissSign AG, CN = SwissSign Server Gold CA 2014 - G22
i:C = CH, O = SwissSign AG, CN = SwissSign Gold CA - G2
---
Server certificate
-----BEGIN CERTIFICATE-----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PgoaHtOiCqmh1oERGFsdlSEy01a/da2WgxQCIAXM1dSNyXhiWTLGGKlg7fYjsVEx
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AAFscGY9CQAABAMARzBFAiBgWjl7D2nTcHPMOY8UVM0qvV9vG1Oqrf8J1zBrJuvw
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LOrJ+FGQ6NNIYoRtilYX79tr+vpieN+P3q0W7M5Y9XEOpLWjuFWe/Ea67j2N4ixa
ZrTFNpw3gHHHJmYnARvKqZpKtC32MAj+NPWDLxy1e8+zcMw0YweZHc6506LPgioo
X6d5IXWcStolqJBWnbYs1KQdgH8sbWLyhHJ9kCedX39vwQE/N+cBvharzwccjedv
crxeTX/NNjicD6YqobSiehIv+xI8QUWHr8lzPQmFFFBWl01mNJFM3aPs5bZCI+bM
bc1zPKsXNIeDuRJAqBtVCMoOUu6sRjobwEwL5QGWfuQjaHe7zXLSXk1HV6Zztg==
-----END CERTIFICATE-----
subject=C = CH, ST = Bern, L = Worblaufen, O = Swisscom (Schweiz) AG, OU
= IT, CN = smtpauths.bluewin.ch
issuer=C = CH, O = SwissSign AG, CN = SwissSign Server Gold CA 2014 - G22
---
No client certificate CA names sent
---
SSL handshake has read 4373 bytes and written 319 bytes
Verification: OK
---
New, (NONE), Cipher is (NONE)
Server public key is 2048 bit
Secure Renegotiation IS supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
SSL-Session:
Protocol : TLSv1.2
Cipher : 0000
Session-ID:
0493D63C78766AC12D9A6DC720FF538862C3FF23B607F60D8A554775700F2219
Session-ID-ctx:
Master-Key:
PSK identity: None
PSK identity hint: None
SRP username: None
Start Time: 1615458529
Timeout : 7200 (sec)
Verify return code: 0 (ok)
Extended master secret: no
---
and disconnect....
And works from bit.nl:
$ openssl s_client -connect smtpauths.bluewin.ch:465
CONNECTED(00000003)
depth=2 C = CH, O = SwissSign AG, CN = SwissSign Gold CA - G2
verify return:1
depth=2 C = CH, O = SwissSign AG, CN = SwissSign Gold CA - G2
verify return:1
depth=1 C = CH, O = SwissSign AG, CN = SwissSign Server Gold CA 2014 - G22
verify return:1
depth=0 C = CH, ST = Bern, L = Worblaufen, O = Swisscom (Schweiz) AG, OU
= IT, CN = smtpauths.bluewin.ch
verify return:1
depth=0 C = CH, ST = Bern, L = Worblaufen, O = Swisscom (Schweiz) AG, OU
= IT, CN = smtpauths.bluewin.ch
verify return:1
write W BLOCK
---
Certificate chain
0 s:/C=CH/ST=Bern/L=Worblaufen/O=Swisscom (Schweiz)
AG/OU=IT/CN=smtpauths.bluewin.ch
i:/C=CH/O=SwissSign AG/CN=SwissSign Server Gold CA 2014 - G22
1 s:/C=CH/O=SwissSign AG/CN=SwissSign Server Gold CA 2014 - G22
i:/C=CH/O=SwissSign AG/CN=SwissSign Gold CA - G2
---
Server certificate
-----BEGIN CERTIFICATE-----
MIIH2jCCBsKgAwIBAgIUGEfAQSLKDtSxeCCekVh0nFmkCOEwDQYJKoZIhvcNAQEL
BQAwUjELMAkGA1UEBhMCQ0gxFTATBgNVBAoTDFN3aXNzU2lnbiBBRzEsMCoGA1UE
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bc1zPKsXNIeDuRJAqBtVCMoOUu6sRjobwEwL5QGWfuQjaHe7zXLSXk1HV6Zztg==
-----END CERTIFICATE-----
subject=/C=CH/ST=Bern/L=Worblaufen/O=Swisscom (Schweiz)
AG/OU=IT/CN=smtpauths.bluewin.ch
issuer=/C=CH/O=SwissSign AG/CN=SwissSign Server Gold CA 2014 - G22
---
No client certificate CA names sent
Server Temp Key: DH, 1024 bits
---
SSL handshake has read 4433 bytes and written 477 bytes
---
New, TLSv1/SSLv3, Cipher is DHE-RSA-AES256-GCM-SHA384
Server public key is 2048 bit
Secure Renegotiation IS supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
SSL-Session:
Protocol : TLSv1.2
Cipher : DHE-RSA-AES256-GCM-SHA384
Session-ID:
E2D86472371DD856CAA1D45E9D6580DF60CA0A5E0660161F0C3396EB6EF5D0EF
Session-ID-ctx:
Master-Key:
9B916B6F692D256A1DF13961D1997A4E296B139E2038C78FA6EB9C85775373B3085169984688961BAB7A14F883BD75BA
Start Time: 1615459460
Timeout : 7200 (sec)
Verify return code: 0 (ok)
---
220 smtpauths.lb.bluewin.ch vimdzmsp-sfwd05.bluewin.ch Swisscom AG ESMTP
server ready
On 2021-03-11 09:25, Jeroen Massar wrote:
Hi,
(Possibly in relation to
http://lists.swinog.ch/public/swinog/2021-March/007457.html, but in this case
not even a TCP ACK...)
It seems smtp.bluewin.ch (25 and 465 tested) is unreachable from all places I
checked (Init7, Quickline, BIT.nl).
Is that service normally open for Bluewin customers to connect to
smtp.bluewin.ch?
As apparently Swisscom is sending out mails to providers that their customers
are complaining that their customers on non-swisscom/bluewin cannot use their
SMTP service.....
But telnet does not even answer.... (no TCP ACK at all, no ICMP, nada nothing),
thus looks like it is firewalled away.
Greets,
Jeroen
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