```
root@host:~# gpgconf --kill all
root@host:~# gpg --recv-keys DBA36B5181D0C816F630E889D980A17457F6FB06
gpg: keyserver receive failed: Operation not permitted
root@host:~# cat dirmngr.log
2018-09-22 07:49:42 dirmngr[6174] listening on socket '/root/.gnupg/S.dirmngr'
2018-09-22 07:49:42 dirmngr[6175.0] permanently loaded certificates: 0
2018-09-22 07:49:42 dirmngr[6175.0] runtime cached certificates: 0
2018-09-22 07:49:43 dirmngr[6175.6] handler for fd 6 started
2018-09-22 07:49:43 dirmngr[6175.6] DBG: chan_6 -> # Home: /root/.gnupg
2018-09-22 07:49:43 dirmngr[6175.6] DBG: chan_6 -> # Config: /root/.gnupg/dirmngr.conf
2018-09-22 07:49:43 dirmngr[6175.6] DBG: chan_6 -> OK Dirmngr 2.1.18 at your service
2018-09-22 07:49:43 dirmngr[6175.6] connection from process 6160 (0:0)
2018-09-22 07:49:43 dirmngr[6175.6] DBG: chan_6 <- GETINFO version
2018-09-22 07:49:43 dirmngr[6175.6] DBG: chan_6 -> D 2.1.18
2018-09-22 07:49:43 dirmngr[6175.6] DBG: chan_6 -> OK
2018-09-22 07:49:43 dirmngr[6175.6] DBG: chan_6 <- KS_GET -- 0xDBA36B5181D0C816F630E889D980A17457F6FB06
2018-09-22 07:49:43 dirmngr[6175.6] DBG: dns: libdns initialized
2018-09-22 07:49:43 dirmngr[6175.6] DBG: dns: getsrv(_pgpkey-https._tcp.hkps.pool.sks-keyservers.net): Operation not permitted
2018-09-22 07:49:43 dirmngr[6175.6] command 'KS_GET' failed: Operation not permitted
2018-09-22 07:49:43 dirmngr[6175.6] DBG: chan_6 -> ERR 167805035 Operation not permitted <Dirmngr>
2018-09-22 07:49:43 dirmngr[6175.6] DBG: chan_6 <- BYE
2018-09-22 07:49:43 dirmngr[6175.6] DBG: chan_6 -> OK closing connection
2018-09-22 07:49:43 dirmngr[6175.6] handler for fd 6 terminated
```
```
ii gnupg 2.1.18-8~deb9u2 amd64 GNU privacy guard - a free PGP replacement
ii gnupg-agent 2.1.18-8~deb9u2 amd64 GNU privacy guard - cryptographic agent
ii gnupg2 2.1.18-8~deb9u2 all GNU privacy guard - a free PGP replacement (dummy transitional package)
dpkg -l | grep dirm
ii dirmngr 2.1.18-8~deb9u2 amd64 GNU privacy guard - network certificate management service
```