netsh.exe: Error 87

Question

I'm having some trouble creating a urlacl reservation in Windows Server 2008; probably this a rookie mistake.

The command line I'm using is:

netsh http add urlacl url=http://+:99898/ user=ben

The error that I see is:

Url reservation add failed, Error: 87
The parameter is incorrect.

There is a local user account named 'ben' that has admin privileges. I've made sure to put a trailing slash after the port number in the URL. Google and MSDN documentation are letting me down now - does anyone have any clue what I'm doing incorrectly?

Did this question make anybody think of TV crime shows with "IP addresses" like "10.68.342.12" in them? >smile — Evan Anderson, Jun 23 '11 at 03:40
Also, as usual, if you have a user name that includes a space, use double-quotes to encapsulate it. e.g., `C:\>netsh http add urlacl url=http://+:9998/ user="DOMAIN\my name"` — lewiSnort, Nov 14 '18 at 01:29

score 53 · Answer 1 · answered Feb 19 '13 at 22:29

53

I had the same error; in my case, the mistake I was making was omitting the trailing slash from the URL:

C:\>netsh http add urlacl url=http://+:8085 user=DOMAIN\myname
Url reservation add failed, Error: 87
The parameter is incorrect.


C:\>netsh http add urlacl url=http://+:8085/ user=DOMAIN\myname
URL reservation successfully added

answered Feb 19 '13 at 22:29

Adam V

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And in my case, I had omitted the `url=` and `user=`, which the documentation says are optional, but are apparently not. – Cameron Jun 02 '16 at 15:32

score 12 · Accepted Answer · answered Jun 23 '11 at 00:14

12

Port number "99898" isn't a valid TCP port number. TCP port numbers are 16-bit unsigned integers, so they can't exceed 65535. I would strongly suspect that this invalid port number is the reason for the error you're seeing.

answered Jun 23 '11 at 00:14

Evan Anderson

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That's it - I tried with a 4-digit port number earlier, but must have gotten a different error. Thanks! – Ben Jun 23 '11 at 00:21

Alexandr · Answer 3 · 2016-10-27T14:41:06.123

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netsh http add urlacl url=https://*:8081/ user=Everyone

Also the trailing slash does matter -------------^

edited Oct 27 '16 at 14:41

answered Oct 25 '16 at 18:54

Alexandr

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Could you improve the quality of your answer by pointing out why your answer is the solution? – John K. N. Oct 28 '16 at 11:36

netsh.exe: Error 87

3 Answers3