Hi,
I'm successfully running MAP-T, everything looks to be working for v6 and v4 so far (www/ftp/ssh..) apart from ICMP for v4, for some reason I'm not able to ping IPv4 addresses.
I see the following error when I try.
Wed Apr 16 08:15:41 2025 kern.warn kernel: [64385.396685] [nat46] Could not translate v4->v6
Raspberry Pi 5 Model B Rev 1.0 (also tried on a Pi 4)
OpenWrt 24.10.0
I've also tried MAP-T with a Fritz5690 PRO and ping v4 works okay with that.
Any advise welcome.
did you ever find a resolution to this?
unfortunately not, going to try MAP-E soon to see if also an issue.
any suggestions for troubleshooting? cursory wireshark inspection shows requests arriving at the map-wan6_4 but no replies (of any sort) ever come back. should the requests be visible as IPV6 traffic on wan interface (eth0 in my case), and if so, in what form?
seems to be an issue occurring in nat46 specifically with ICMP:
May 21 21:48:25 my-r4s kernel: [96555.777549] nat46_ipv4_input packet
May 21 21:48:25 my-r4s kernel: [96555.777958] nat46_ipv4_input protocol: 1, len: 84, flags: 01
May 21 21:48:25 my-r4s kernel: [96555.778482] ICMP echo request translated into IPv6, id: 3410
May 21 21:48:25 my-r4s kernel: [96555.779026] xlate_map_v4_to_v6: IPv4 address wx.yz.27.159 outside of MAP domain st.uv.160.0/22
May 21 21:48:25 my-r4s kernel: [96555.779860] [nat46] pairs_xlate_v4_to_v6_outer result: src -1 dst 2
May 21 21:48:25 my-r4s kernel: [96555.780430] [nat46] Could not find a translation pair v4->v6
May 21 21:48:25 my-r4s kernel: [96555.780964] [nat46] Could not translate v4->v6
i'm not sure if this is down to a misconfiguration from me or ISP (Sky UK), or a bug in openwrt map, or nat46.