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FS#155 - nslookup: can't resolve #5711

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openwrt-bot opened this issue Sep 4, 2016 · 5 comments
Closed

FS#155 - nslookup: can't resolve #5711

openwrt-bot opened this issue Sep 4, 2016 · 5 comments
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@openwrt-bot
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openwrt-bot commented Sep 4, 2016

github-import:

Github issue #123 reported by: https://github.com/davidc502

Issue shows itself from command line or LuCi Diagnostics page. Flashed back to stock, and then back to lede to be sure it wasn't a configuration issue I caused.

root@lede:~# nslookup dev.openwrt.org
nslookup: can't resolve '(null)': Name does not resolve

Name: dev.openwrt.org
Address 1: 217.115.15.26 dev.openwrt.nanl.de
Address 2: 2a00:1328:e000:452::26

However running the following command will work.

root@lede:~# nslookup dev.openwrt.org localhost <<< Added localhost for local lookup.
Server: 127.0.0.1
Address 1: 127.0.0.1 localhost

Name: dev.openwrt.org
Address 1: 217.115.15.26 dev.openwrt.nanl.de
Address 2: 2a00:1328:e000:452::26

This issue appears to affect Dynamic DNS.

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openwrt-bot commented Sep 4, 2016

github-import:

**davidc502 commented on Jun 15 • edited
**
For those who need a work around.This also temporarily fixes Dynamic DNS which depends on nslookup.

Remove the symbolic link nslookup in /usr/bin

Put the following command in a script, NAME IT nslookup and place it in /usr/bin
Don't forget to make it executable.

/bin/busybox nslookup $1 localhost

name server lookups work properly
.
root@lede:~# nslookup google.com
Server: 127.0.0.1
Address 1: 127.0.0.1 localhost

Name: google.com
Address 1: 74.125.196.102 yk-in-f102.1e100.net
Address 2: 74.125.196.113 yk-in-f113.1e100.net
Address 3: 74.125.196.100 yk-in-f100.1e100.net
Address 4: 74.125.196.138 yk-in-f138.1e100.net
Address 5: 74.125.196.139 yk-in-f139.1e100.net
Address 6: 74.125.196.101 yk-in-f101.1e100.net
Address 7: 2607:f8b0:4002:c07::65 yk-in-x65.1e100.net

**hnyman commented on Jun 21
**
This sounds like the musl - busybox nslookup incompatibility (regarding the server parameter, both using it and displaying it).

[[https://dev.openwrt.org/ticket/18333]]\
[[https://dev.openwrt.org/ticket/20893]]

**davidc502 commented on Jul 16
**
Just compiled lede r1003 and the issue is still there. Does anyone know if it is being looked at?

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openwrt-bot commented Sep 5, 2016

arjendekorte:

The workaround proposed above does not solve the underlying issue. The tickets above explain this is a fundamental problem with busybox using the musl library.

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openwrt-bot commented Mar 14, 2017

jow-:

Please try the latest commit in my staging tree: https://git.lede-project.org/b4bfa07

If you customized your busybox settings, you need to deselect the "nslookup" applet and select the appearing "nslookup_lede" variant instead. If you did not customize the busybox config, the applet should get replaced automatically.

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openwrt-bot commented Mar 14, 2017

jow-:

Size comparison between nslookup and nslookup_lede:

busybox w/ nslookup

-rw-r--r-- 1 jow jow 215K Mar 14 22:47 bin/packages/x86_64/base/busybox_1.26.2-2_x86_64.ipk
-rwxr-xr-x 1 jow jow 423K Mar 14 22:47 build_dir/target-x86_64_musl/busybox-1.26.2/busybox_unstripped
-rwxr-xr-x 1 jow jow 347K Mar 14 22:47 build_dir/target-x86_64_musl/busybox-1.26.2/ipkg-x86_64/busybox/bin/busybox

busybox w/ nslookup_lede

-rw-r--r-- 1 jow jow 219K Mar 14 22:43 bin/packages/x86_64/base/busybox_1.26.2-2_x86_64.ipk
-rwxr-xr-x 1 jow jow 432K Mar 14 22:43 build_dir/target-x86_64_musl/busybox-1.26.2/busybox_unstripped
-rwxr-xr-x 1 jow jow 355K Mar 14 22:43 build_dir/target-x86_64_musl/busybox-1.26.2/ipkg-x86_64/busybox/bin/busybox

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openwrt-bot commented May 29, 2017

val-kulkov:

Please ignore my request to reopen. I am not yet completely familiar with the Flyspray interface; noticed the comments here (far below in the page) after my request had already been submitted. I am confirming that when nslookup_lede option is selected, nslookup works fine. Perhaps there should be only one option for the nslookup applet -- the one that works properly.

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