[NA HW1-3] preflight 192.168.255.3 cache too old

[周哲煒]

助教您好:

  我的HW1-3 preflight 過不了，192.168.255.3抓不到record(但192.168.255.1可以)
=====================
preflight - preflight
USER_ID: 157, SUBNET: 192.168.9.208/28, RESOLVER: 192.168.255.3
TA_PASSWORD: ...., TOTP_SECRET: ........
WORK1_HOST: workstation1.157.nasa, WORK2_HOST: workstation2.157.nasa
LDAP_URL: ldaps://ldap.157.nasa, BASE_DN: dc=157,dc=nasa
Resolving WORK1 and WORK2 IP addresses using RESOLVER...
WORK1: , WORK2:
------ CHECK PREFLIGHT -----

Checking DNS records from resolver.
DNS record for workstation1.157.nasa is missing.preflight - preflight

USER_ID: 157, SUBNET: 192.168.9.208/28, RESOLVER: 192.168.255.3
TA_PASSWORD: Lf4C0X3y2E9hcps, TOTP_SECRET: YZLWEO3X2AUIAAZ25QPNJZZHIWHU4I2C
WORK1_HOST: workstation1.157.nasa, WORK2_HOST: workstation2.157.nasa
LDAP_URL: ldaps://ldap.157.nasa, BASE_DN: dc=157,dc=nasa
Resolving WORK1 and WORK2 IP addresses using RESOLVER...
WORK1: , WORK2:
------ CHECK PREFLIGHT -----

Checking DNS records from resolver.
DNS record for workstation1.157.nasa is missing.
=======================
我本地dig 看起來192.168.255.3吃到舊的cache了

========================
ccna@router:~$ dig @192.168.255.1 workstation1.157.nasa

; <<>> DiG 9.18.39-0ubuntu0.24.04.5-Ubuntu <<>> @192.168.255.1 workstation1.157.nasa
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 61057
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 2
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: ccbdee6dc1e581aa010000006a33e24ef426206ed6571120 (good)
;; QUESTION SECTION:
;workstation1.157.nasa.         IN      A

;; AUTHORITY SECTION:
157.nasa.               300     IN      NS      ns.157.nasa.

;; ADDITIONAL SECTION:
ns.157.nasa.            300     IN      A       192.168.9.211

;; Query time: 15 msec
;; SERVER: 192.168.255.1#53(192.168.255.1) (UDP)
;; WHEN: Thu Jun 18 12:19:26 UTC 2026
;; MSG SIZE  rcvd: 111

ccna@router:~$ dig @192.168.255.3 workstation1.157.nasa

; <<>> DiG 9.18.39-0ubuntu0.24.04.5-Ubuntu <<>> @192.168.255.3 workstation1.157.nasa
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 6046
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: ad571118669b08c9010000006a33e25382df61231014d65c (good)
;; QUESTION SECTION:
;workstation1.157.nasa.         IN      A

;; AUTHORITY SECTION:
157.nasa.               34069   IN      SOA     private-ns.157.nasa. admin.157.nasa. 2026061809 3600 1800 604800 86400

;; Query time: 19 msec
;; SERVER: 192.168.255.3#53(192.168.255.3) (UDP)
;; WHEN: Thu Jun 18 12:19:31 UTC 2026
;; MSG SIZE  rcvd: 131

ccna@router:~$ dig @192.168.255.3 workstation1.157.nasa +recurse

; <<>> DiG 9.18.39-0ubuntu0.24.04.5-Ubuntu <<>> @192.168.255.3 workstation1.157.nasa +recurse
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 26404
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: ff4aa1987c506239010000006a33e25942e26d35cdc36992 (good)
;; QUESTION SECTION:
;workstation1.157.nasa.         IN      A

;; AUTHORITY SECTION:
157.nasa.               34063   IN      SOA     private-ns.157.nasa. admin.157.nasa. 2026061809 3600 1800 604800 86400

;; Query time: 17 msec
;; SERVER: 192.168.255.3#53(192.168.255.3) (UDP)
;; WHEN: Thu Jun 18 12:19:37 UTC 2026
;; MSG SIZE  rcvd: 131
====================
請問要如何解決問題

[管培勛]

同學好：

Should be fixed.

BR,

TA phkoan, hsuchy

chou...@nycu.edu.tw 在 2026年6月18日 星期四晚上8:21:21 [UTC+8] 的信中寫道：

[孫奇霆（112950026）]

preflight - preflight
USER_ID: 13, SUBNET: 192.168.0.208/28, RESOLVER: 192.168.255.3
TA_PASSWORD: Pz0j62xjpmSTctS, TOTP_SECRET: RNWIQVT4CA4Z6BLFSKYN2JQNN6J4RH6M
WORK1_HOST: workstation1.13.nasa, WORK2_HOST: workstation2.13.nasa
LDAP_URL: ldaps://ldap.13.nasa, BASE_DN: dc=13,dc=nasa

Resolving WORK1 and WORK2 IP addresses using RESOLVER...

WORK1: 172.16.0.101, WORK2: 172.16.0.102

------ CHECK PREFLIGHT -----

Checking DNS records from resolver.

Checking SSH connectivity.
SSH to workstation1 failed for generalta.

助教您好 由於我之前的DNS 過期時間設定是1週

可能也是碰到類似的問題，請問要怎麼解決？

管培勛 在 2026年6月18日 星期四晚上9:25:57 [UTC+8] 的信中寫道：