Does not seem to work with zsh running on OSX

[nodesocket]

iMac ➜  Desktop ./dnstest.sh
               test1   test2   test3   test4   test5   test6   test7   test8   test9   test10  Average
cloudflare      ms     expr: syntax error

[cleanbrowsing]

Try to run it as:

sh ./dnstest.sh

To force the "sh" shell instead of zsh. It seems to be missing the expr command on zsh.

[dgirgenti]

it's not the expr that's failing, it's the dig.

Trying to dig www.google.com @1.1.1.1 results in:

; <<>> DiG 9.8.3-P1 <<>> www.google.com @1.1.1.1
; (1 server found)
;; global options: +cmd
;; connection timed out; no servers could be reached

I believe in my case this may be due to my company's firewall blocking external DNS, but I've not verified this yet

[dgirgenti]

Yeah I just verified that my company is blocking external DNS traffic (and the same command works when I hard-code my local DNS), I'll try the tool out when I get home and verify that it works on zsh

[nodesocket]

@dgirgenti the dig command is working fine. I believe it is the expr command on zsh.

[dgirgenti]

so dig www.google.com @1.1.1.1 works fine for you? for me the expr works fine when given a valid result from dig which is failing for me

[JohnKacz]

Yea I'm seeing the same issue as @dgirgenti

$ dig google.com @1.1.1.1
; <<>> DiG 9.8.3-P1 <<>> google.com @1.1.1.1
;; global options: +cmd
;; connection timed out; no servers could be reached

[nodesocket]

Stange this works on my MacBook Pro running zsh, but not on my iMac running zsh.

What version of dig are you running? On my MacBook Pro I am running:

MacBook-Pro ➜  ~ dig -v
DiG 9.10.6

[dgirgenti]

I'm on macOS 10.12.6 and dig is 9.8.3-P1. Are either of those machines on high sierra?

[nodesocket]

I think I figured out the issue, it seems my home ISP (AT&T fiber) is blocking the dig request for some strange reason even though I am using 1.1.1.1 successfully at home.

From my office:

MacBook-Pro ➜  ~ dig google.com @1.1.1.1

; <<>> DiG 9.10.6 <<>> google.com @1.1.1.1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 50804
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1536
;; QUESTION SECTION:
;google.com.			IN	A

;; ANSWER SECTION:
google.com.		39	IN	A	172.217.0.78

;; Query time: 4 msec
;; SERVER: 1.1.1.1#53(1.1.1.1)
;; WHEN: Mon Apr 02 14:39:35 CDT 2018
;; MSG SIZE  rcvd: 55

VPNing into my home:

MacBook-Pro ➜  ~ dig google.com @1.1.1.1

; <<>> DiG 9.10.6 <<>> google.com @1.1.1.1
;; global options: +cmd
;; connection timed out; no servers could be reached

[GreenZapdos]

Looks like some ISPs are having problems with 1.1.1.1. You can change that line in the script to 1.0.0.1 (the alternate ip for Cloudflare) and it may work.

[cleanbrowsing]

Yes, 1.1.1.1 is not accessible from a bunch of locations due to mis-configured ISPs and routers.

Unfortunately, many people can't use it right now.

[kriskhaira]

Works fine for me on macOS 10.13.4 and zsh 5.3.

[mrdatawolf]

Works correctly for me on macOs 10.13.3 and zsh 5.3