New Firmware for DPC3941B? New bugs?
I believe that my Comcast provided router, a Cisco DPC3941B, rebooted last night with a firmware update. Although I cannot tell from any of the log files and nothing seems to have a date. But the software version on it now is
DOCSIS Software Version: 18.104.22.168_22.214.171.124Software Image Name: DPC3941B_3.9p36s1_PROD_seyAdvanced Services: DPC3941B
That reboot, or update, was pretty annoying since it seemed to change the MAC address and the IPv6 link-local on the gateway, which broke IPv6 on one of my static servers.
The new annoyance this morning is that IPv4 access from the internal 10.0.10.0/24 network to the static IP at 126.96.36.199 is not working for Windows machines. It does work for a Linux machine, apparently because it receives a nonsense ICMP Redirect and ignores it.
Check this out:
PING catbox.zlynx.org (188.8.131.52) 56(84) bytes of data.
From _gateway (10.1.10.1) icmp_seq=1 Redirect Host(New nexthop: mm-74-92-214-37.mogilev.dynamic.pppoe.byfly.by (184.108.40.206))
64 bytes from catbox.zlynx.org (220.127.116.11): icmp_seq=1 ttl=64 time=2.66 ms
From _gateway (10.1.10.1) icmp_seq=2 Redirect Host(New nexthop: mm-74-92-214-37.mogilev.dynamic.pppoe.byfly.by (18.104.22.168))
64 bytes from catbox.zlynx.org (22.214.171.124): icmp_seq=2 ttl=64 time=1.66 ms
That redirect host is super suspicious. Look at its numbers. It is the 126.96.36.199 IP address with the bytes reversed! Who is writing this firmware, anyway?
It wasn't doing this yesterday.