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how to eliminate 502-bad gateway

  • 4 trả lời
  • 3 gặp vấn đề này
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  • Trả lời mới nhất được viết bởi jnojr

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when trying to open emails on Verizon web mail , " 502- bad gateway" comes up and unable to open emails - what is the problem and how do I fix?

when trying to open emails on Verizon web mail , " 502- bad gateway" comes up and unable to open emails - what is the problem and how do I fix?

Tất cả các câu trả lời (4)

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Does that happen with other browsers?

My first thought is a TLS issue... there's a big enough mismatch in security settings that Verizon's front-end is not even trying. I would want to find out what certificate is being presented and make sure it's trust chain is intact (ie. I have any and all intermediate and root CA certs in my cert store) and make sure they aren't using either too old of a cipher (SSL or a really weak algo) or too new (maybe locked to TLS 1.2 and your Firefox isn't negotiating that correctly). You can use the 'openssl' command-line tool to help figure this out.

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Hi Edgewater, I'm not familiar with Verizon's web mail interface. Are you getting a tab that just has a white background and "502- bad gateway" in black text, or is there more to it? Is it when you launch a message from your Inbox or can you not get anything useful from the site?

If you are using an old bookmark to get to your mail: try going through the front page in case there is a "failure to redirect" with the old address. http://www.verizon.com/?lid=//global//residential

And if you haven't already:

When you have a problem with one particular site, a good "first thing to try" is clearing your Firefox cache and deleting your saved cookies for the site.

(1) Clear Firefox's Cache

See: How to clear the Firefox cache

If you have a large hard drive, this might take a few minutes. If you do not see the number going down on the page, you can reload it using Ctrl+r to check progress.

(2) Remove the site's cookies (save any pending work first). While viewing a page on the site, try either:

  • right-click (on Mac Ctrl+click) a blank area of the page and choose View Page Info > Security > "View Cookies"
  • (menu bar) Tools > Page Info > Security > "View Cookies"
  • click the padlock or "i" icon in the address bar, then the ">" button, then More Information, and finally the "View Cookies" button

In the dialog that opens, the current site should be pre-filled in the search box at the top of the dialog so you can remove that site's cookies individually.

Then try reloading the page. Does that help?

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Hi jnojr, is this available for Windows 10?

You can use the 'openssl' command-line tool to help figure this out.

Could be handy to learn, but I'm sure a tutorial will be needed.

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I'm not a Windows guy, but:

http://gnuwin32.sourceforge.net/packages/openssl.htm

Assuming it works under Windows like a "real" OS (sorry, couldn't resist!), you'll see something like:

[joliver@neetdev08 ~]$ openssl s_client -connect www.google.com:443 CONNECTED(00000003) depth=3 C = US, O = Equifax, OU = Equifax Secure Certificate Authority verify return:1 depth=2 C = US, O = GeoTrust Inc., CN = GeoTrust Global CA verify return:1 depth=1 C = US, O = Google Inc, CN = Google Internet Authority G2 verify return:1 depth=0 C = US, ST = California, L = Mountain View, O = Google Inc, CN = www.google.com verify return:1 --- Certificate chain

0 s:/C=US/ST=California/L=Mountain View/O=Google Inc/CN=www.google.com
  i:/C=US/O=Google Inc/CN=Google Internet Authority G2
1 s:/C=US/O=Google Inc/CN=Google Internet Authority G2
  i:/C=US/O=GeoTrust Inc./CN=GeoTrust Global CA
2 s:/C=US/O=GeoTrust Inc./CN=GeoTrust Global CA
  i:/C=US/O=Equifax/OU=Equifax Secure Certificate Authority

--- Server certificate


BEGIN CERTIFICATE-----

<SNIPPED>


END CERTIFICATE-----

subject=/C=US/ST=California/L=Mountain View/O=Google Inc/CN=www.google.com issuer=/C=US/O=Google Inc/CN=Google Internet Authority G2 --- No client certificate CA names sent Server Temp Key: ECDH, prime256v1, 256 bits --- SSL handshake has read 3727 bytes and written 373 bytes --- New, TLSv1/SSLv3, Cipher is ECDHE-RSA-AES128-GCM-SHA256 Server public key is 2048 bit Secure Renegotiation IS supported Compression: NONE Expansion: NONE SSL-Session:

   Protocol  : TLSv1.2
   Cipher    : ECDHE-RSA-AES128-GCM-SHA256
   Session-ID: 59EDDB44D4299E8715BFC31E5AEF6FF44E9EDAF3E225B2DF8E8CD04565517733
   Session-ID-ctx: 
   Master-Key: 60919DE7248763922E462D665E53BBBBA44963CFD6C57CC46FBD7A89B85B479CB9FE07437C848054C0954CA9900BFF0D
   Key-Arg   : None
   Krb5 Principal: None
   PSK identity: None
   PSK identity hint: None
   TLS session ticket lifetime hint: 100800 (seconds)
   TLS session ticket:
   0000 - 5d 17 47 c4 74 b4 05 02-be 8f 4d 91 be 99 c3 42   ].G.t.....M....B
   0010 - 65 a9 76 f9 b1 0c df c8-d1 11 a6 35 4d 14 53 5c   e.v........5M.S\
   0020 - e5 61 67 d5 8f 5b dd 5b-95 07 5b 1e 6d c2 c8 d7   .ag..[.[..[.m...
   0030 - af 42 2d ae d7 c0 22 2b-14 86 4a 59 2e 50 a8 59   .B-..."+..JY.P.Y
   0040 - 1a 7a e0 3a ab a9 f5 ac-90 ef f8 31 eb 68 1e 1e   .z.:.......1.h..
   0050 - 26 7b 49 2c 27 0f 67 6f-82 37 95 8c 29 e4 d5 17   &{I,'.go.7..)...
   0060 - 10 b5 6d 3d ec 9e 4b 8d-7c 2f ff 32 3d 97 b5 d4   ..m=..K.|/.2=...
   0070 - d0 3e 69 a7 16 c0 8f b6-d3 aa 9e 67 b6 03 4a 55   .>i........g..JU
   0080 - 60 c7 e2 87 ce a7 b3 ff-94 7c 29 63 4e 7c 5c fd   `........|)cN|\.
   0090 - 88 2b a1 6d 4f d1 6d 4b-5e de 5b 38 d7 5d 9e a8   .+.mO.mK^.[8.]..
   00a0 - ad 37 84 70                                       .7.p
   Start Time: 1482173327
   Timeout   : 300 (sec)
   Verify return code: 0 (ok)

--- ^C