我的 Turris Omnia 无法解析 t.co，但与其他域（例如 twitter.com 或 x.co）没有问题。本地名称 (hpdisk.lan) 也可以使用：
root@turris:~# ping t.co
ping: t.co: Name does not resolve
root@turris:~# ping twitter.com
PING twitter.com (104.244.42.193) 56(84) bytes of data.
64 bytes from 104.244.42.193 (104.244.42.193): icmp_seq=1 ttl=58 time=11.5 ms
tange@turris:~$ ping x.co
PING x.co (148.72.51.157) 56(84) bytes of data.
64 bytes from 157.51.72.148.host.secureserver.net (148.72.51.157): icmp_seq=1 ttl=42 time=139 ms
tange@turris:~$ ping hpdisk.lan
PING hpdisk.lan (192.168.1.30) 56(84) bytes of data.
64 bytes from 192.168.1.30 (192.168.1.30): icmp_seq=1 ttl=64 time=0.374 ms
路由器查询身份验证名称服务器没有问题，因此不是由某些网络过滤或路由问题引起的：
root@turris:/tmp/log# dig @a.r06.twtrdns.net. t.co
; <<>> DiG 9.18.24 <<>> @a.r06.twtrdns.net. t.co
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 13597
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 8, ADDITIONAL: 1
;; WARNING: recursion requested but not available
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;t.co. IN A
;; ANSWER SECTION:
t.co. 300 IN A 104.244.42.197
查找 u.co 会导致此流量（与 [as,uz].co 非常相似）：
14:36:00.469554 IP 100.100.246.190.51757 > 156.154.105.25.53: 20216% [1au] A? U.CO. (33)
14:36:00.484396 IP 156.154.105.25.53 > 100.100.246.190.51757: 20216- 0/6/1 (639)
14:36:00.485495 IP 100.100.246.190.55245 > 193.108.91.245.53: 25634% [1au] A? Ns50.DoMAInCoNtROL.COm. (51)
14:36:00.500380 IP 193.108.91.245.53 > 100.100.246.190.55245: 25634*- 1/0/1 A 173.201.72.25 (67)
14:36:00.500659 IP 100.100.246.190.60650 > 173.201.72.25.53: 49104% [1au] A? U.Co. (33)
14:36:00.513975 IP 173.201.72.25.53 > 100.100.246.190.60650: 49104*- 2/2/1 A 15.197.142.173, A 3.33.152.147 (120)
查找 t.co 不会导致任何流量。闻起来好像 Knot Resolver 认为它是 t.co 的授权
我已尝试重新启动路由器。这并没有解决问题。
root@turris:~# uname -a
Linux turris 5.15.148 #0 SMP Tue Apr 2 01:04:13 2024 armv7l GNU/Linux
root@turris:~# kresd --version
Knot Resolver, version 5.7.1
root@turris:~# netstat -anp |grep 0:53
tcp 0 0 0.0.0.0:53 0.0.0.0:* LISTEN 18768/kresd
udp 0 0 0.0.0.0:53 0.0.0.0:* 18768/kresd
tange@turris:~$ cat /etc/resolv.conf
search lan
nameserver 127.0.0.1
nameserver ::1
root@turris:/tmp/log# cat /var/log/resolver
Apr 27 11:52:30 turris kresd[8728]: [system] warning: hard limit for number of file-descriptors is only 4096 but recommended value is 524288
Apr 27 11:52:50 turris kresd[12702]: [system] warning: hard limit for number of file-descriptors is only 4096 but recommended value is 524288
答案1
修复者：
root@turris:~# /etc/init.d/adblock disable
root@turris:~# reboot
t.co 似乎位于广告拦截列表中，并且 Turris Omnia 上默认启用广告拦截。