Dolphin Anty proxy error

Last checked 2026-08-14

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'dolphin anty proxy format' appears as its own completion, separate from 'dolphin anty proxy error', 'dolphin anty proxy not working' and 'dolphin anty failed to establish proxy connection'. That is enough to say the input format is a distinct thing people search for on its own - not a footnote to fix after everything else, but a first thing to rule out.

The same four pieces of information - host, port, username and password - show up in at least four written forms depending on where the string was copied from: host:port:user:pass, a plain colon-separated string with the host first, which is the shape a profile input box asks for; user:pass:host:port, the same four colon-separated fields with the credential pair moved to the front - a reordering of the first form that is not visibly different from it at a glance; user:pass@host:port, an at-sign form with no scheme prefix; and http://user:pass@host:port, the full form curl uses in every command on this page.

curl accepts the last two of those forms and rejects the first two outright. Its manpage documents that a --proxy value with no protocol prefix is treated the same as an http:// proxy - confirmed here by running the same unreachable address through both forms and getting the identical 'Failed to connect' result from each. Feed curl either of the two colon-only four-field forms instead, and it never attempts a connection at all: it tries to read everything after the first colon as a port number, fails immediately, and returns 'Unsupported proxy syntax' before any network request goes out, regardless of which field order was used. That immediate syntax error is informative on its own - if curl produces it, the string needs reformatting, not more connectivity troubleshooting.

A text field built to accept the colon-only host:port:user:pass form takes it without complaint, and if it does no more validation than splitting the string by position, it has no way to notice when the same four values arrive in the swapped user:pass:host:port order. The risk is a string that gets accepted, then points at the wrong host, and fails to connect for reasons that have nothing to do with the proxy itself.

Everything below runs outside Dolphin Anty. Replace USER, PASS, HOST and PORT with your own values, and keep the single quotes - an ampersand or a hash in a generated password will otherwise be eaten by your shell.

Five-minute checklist

1. Confirm the proxy works at all, independent of the profile

A 200 here establishes that the proxy, port, protocol and credentials are all correct. Anything that still fails inside Dolphin Anty after this passes is a configuration problem in the profile, not a dead proxy.

curl -sS -o /dev/null -w 'http_code=%{http_code}\n' --max-time 15 --proxy 'http://USER:PASS@HOST:PORT' https://example.com

2. Confirm curl treats a scheme-less credential string the same as the full form

This is the same request as the previous step, written without the http:// prefix - user:pass@host:port instead of http://user:pass@host:port. curl's own manpage says an unscoped --proxy value is treated as an HTTP proxy by default, so the two commands should behave identically; a difference here points at how the string was typed, not at the network path. This is also the shape you get by stripping the scheme off a copied proxy URL, so it is worth testing directly rather than assumed.

curl -sS -o /dev/null -w 'http_code=%{http_code}\n' --max-time 15 --proxy 'USER:PASS@HOST:PORT' https://example.com

3. Separate a wrong password from an unreachable host

With the format question settled by the two steps above, this isolates credentials from reachability the same way: a 407 on a request with no credentials at all confirms the proxy accepts the connection and is simply waiting on a password, while a timeout points somewhere else entirely - the host, the port, or the path to either.

curl -sS -o /dev/null -w 'http_code=%{http_code}\n' --max-time 15 --proxy 'http://HOST:PORT' https://example.com

4. Check whether only HTTPS traffic is blocked

A proxy that is correctly formatted and correctly authenticated can still refuse to tunnel HTTPS specifically. Plain HTTP succeeding here while the earlier HTTPS check failed narrows the fault to the CONNECT method on the upstream side - a failure mode that no amount of reformatting the credential string will touch.

curl -sS -o /dev/null -w 'http_code=%{http_code}\n' --max-time 15 --proxy 'http://USER:PASS@HOST:PORT' http://example.com

5. Confirm the exit IP matches what you expect

A correctly formatted, correctly authenticating proxy can still be the wrong proxy, particularly if a pool failed over to a different member. Compare this IP against the provider dashboard before assuming the profile is at fault.

curl -sS --max-time 15 --proxy 'http://USER:PASS@HOST:PORT' https://api.ipify.org

6. Read the handshake to see which layer fails

Past the format and CONNECT questions above, the verbose trace is what separates a network-level failure from a permission failure from a certificate failure - three different fixes that a plain error banner in Dolphin Anty has no way to tell apart.

curl -sS -v --max-time 15 --proxy 'http://USER:PASS@HOST:PORT' https://example.com 2>&1 | head -n 25

Which side owns the problem

OwnerCauseWhat it looks like
The browser Field order reversed in the credential string The four fields - host, port, user and password - can be written in more than one order across different tools. Pasting a string built for one ordering into an input box that expects another produces a string that parses without complaint and simply points at the wrong thing.
The browser Protocol selected incorrectly in the profile An HTTP proxy entered as SOCKS5 cannot complete a connection at all, and a generic error does not name the mismatch. Check the protocol setting against what the provider issued.
The browser Invisible damage from copying the string A full-width colon typed from a non-English input method, trailing whitespace, or a line break introduced by a chat client or spreadsheet cell. None of these look different enough to catch by eye, and curl and a browser input field do not necessarily tolerate the same characters.
The proxy CONNECT not permitted on the exit Plain HTTP works, every HTTPS target fails. Step 4 isolates this in one command.
The proxy Plan limit reached The upstream still answers TCP and still authenticates, then declines to forward. Nothing in a generic error banner can tell this apart from a bad password.
Credential handling The same credentials in more than one place at once When one host:port:user:pass string is active on more than one machine, the provider sees concurrent sessions from unrelated IPs and may throttle or block the account.
Credential handling Rotated credentials still in circulation The password changed on the provider side, and whoever still has the old string keeps authenticating with it, producing an error that looks identical to any other credential problem.

The same failure in other browsers

Vendor documentation only covers its own product. These are the phrasings the same underlying faults get in the other antidetect browsers.

BrowserHow it readsWhat differs
adspower adspower proxy failure Same diagnostic order applies: confirm reachability outside the browser first, then look for format or protocol mismatches inside the profile.
gologin gologin proxy not working 'gologin proxy not working' is phrased just as undifferentiated as this page's own symptom strings: one wording standing in for format, protocol, reachability and credential causes alike, with nothing in it to tell them apart.
multilogin multilogin proxy connection failed A differently worded failure with the same underlying question: is the string actually correct before you assume the proxy is unreachable?

What this page cannot fix

  • An upstream IP that the destination site has already banned. That needs a different exit, and we do not sell IPs.
  • socks5 upstreams. Our first release only accepts http and https upstream proxies.
  • Bandwidth caps, concurrency limits and throttling applied on the provider side.
  • A browser fingerprint that contradicts the exit IP after a failover pool switches country. We warn about this; we do not rewrite your fingerprint.

If you hand these credentials to other people

Most of the causes above are diagnosable in one command. One is not: when the same host:port:user:pass string is in several hands, you cannot tell who is using which credential, so the same failure keeps coming back and every diagnosis starts from zero.

Proxy Bastion gives each person a separate, revocable, metered link instead of your proxy credentials. They never see the upstream address or password, and you can revoke one without rotating anything.

How it works

Sources