Pfsense ERROR - The Remote Server returned an error: (417) Expectation Failed

browndawg74

Where is the Squid.conf located? Has anybody fixed this error?

I open up outbound port to let the traffic out but I am still getting this error.

TLP

Hello, I know this is a not so old post, but its better to post then create a new one

Does anyone know what this error means?? I am getting the same error, I have a program that is trying to connect to a webservice, heres the access.log error

TCP_MISS/417 1822 POST http://200.247.221.35/sgrOpentech/sgrOpentech.asmx - NONE/- text/html

cmb

From RFC 2616:

"417 Expectation Failed

The expectation given in an Expect request-header field (see section 14.20) could not be met by this server, or, if the server is a proxy, the server has unambiguous evidence that the request could not be met by the next-hop server."

Assuming you're using Squid as well, it means Squid got a response from the target server that the request cannot be completed.

Nachtfalke

@TLP:

(…)
TCP_MISS/417 1822 POST http://200.247.221.35/sgrOpentech/sgrOpentech.asmx - NONE/- text/html

Tried this link through my transparent squid (2.7) without any problems.

TLP

Resolved by putting```
ignore_expect_100 on;


after reading the RFC1626 i found this and discovered the problem was with the status 100

8.2.3 Use of the 100 (Continue) Status

The purpose of the 100 (Continue) status (see section 10.1.1) is to
allow a client that is sending a request message with a request body
to determine if the origin server is willing to accept the request
(based on the request headers) before the client sends the request
body. In some cases, it might either be inappropriate or highly
inefficient for the client to send the body if the server will reject
the message without looking at the body.

Requirements for HTTP/1.1 clients:

- If a client will wait for a 100 (Continue) response before
sending the request body, it MUST send an Expect request-header
field (section 14.20) with the "100-continue" expectation.

- A client MUST NOT send an Expect request-header field (section
14.20) with the "100-continue" expectation if it does not intend
to send a request body.

Because of the presence of older implementations, the protocol allows
ambiguous situations in which a client may send "Expect: 100-
continue" without receiving either a 417 (Expectation Failed) status
or a 100 (Continue) status. Therefore, when a client sends this
header field to an origin server (possibly via a proxy) from which it
has never seen a 100 (Continue) status, the client SHOULD NOT wait
for an indefinite period before sending the request body.

mohanrao83

i also facing same problem,..

417 Expectation Failed