https://drkt.eu/library

  • 1 Post
  • 31 Comments
Joined 1 year ago
Cake day: June 21st, 2023
  • drkt@feddit.dkOPtoSelfhosted@lemmy.world•rDNS, how?English
    1·
    1 year ago

    Replying to both of your comments:

    These are captured on both my gateway and the Apache LXC container. The captured packets are identical as far as tcpdump is aware on both of these systems. As far as I can tell, unless there are shenanigans at the firewall WAN NIC, this is how the packets arrive to my firewall.

    And I don’t think this is asymmetrical routing if I understand it correctly, as I only have one firewall. My interfaces are configured correctly according to that netgate article.

  • drkt@feddit.dkOPtoSelfhosted@lemmy.world•rDNS, how?English
    1·
    1 year ago

    He’s running Windows 10, unfortunately- but wouldn’t SSL errors show up in Apache logs? His IP appears 0 times in all apache error and access logs dating back 8 months (the beginning of recorded logs).

    Here’s another example of a working request to https://drkt.eu, and his non-working request respectively.

    21:06:10.038213 IP 185.21.217.51.34034 > 192.168.78.164.443: Flags [S], seq 383581601, win 65535, options [mss 1460,nop,nop,sackOK,nop,wscale 11], length 0
21:06:10.038225 IP 192.168.78.164.443 > 185.21.217.51.34034: Flags [S.], seq 1228608203, ack 383581602, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
21:06:10.062959 IP 185.21.217.51.34034 > 192.168.78.164.443: Flags [.], ack 1228608204, win 32, length 0
21:06:10.068861 IP 185.21.217.51.34034 > 192.168.78.164.443: Flags [P.], seq 383581602:383582119, ack 1228608204, win 32, length 517
21:06:10.068878 IP 192.168.78.164.443 > 185.21.217.51.34034: Flags [.], ack 383582119, win 501, length 0
21:06:10.069190 IP 192.168.78.164.443 > 185.21.217.51.34034: Flags [P.], seq 1228608204:1228611124, ack 383582119, win 501, length 2920
21:06:10.069272 IP 192.168.78.164.443 > 185.21.217.51.34034: Flags [P.], seq 1228611124:1228612300, ack 383582119, win 501, length 1176
21:06:10.069905 IP 192.168.78.164.443 > 185.21.217.51.34034: Flags [P.], seq 1228612300:1228613496, ack 383582119, win 501, length 1196
21:06:10.093915 IP 185.21.217.51.34034 > 192.168.78.164.443: Flags [.], ack 1228611124, win 35, length 0
21:06:10.094156 IP 185.21.217.51.34034 > 192.168.78.164.443: Flags [.], ack 1228612300, win 37, length 0
21:06:10.095161 IP 185.21.217.51.34034 > 192.168.78.164.443: Flags [.], ack 1228613496, win 38, length 0
21:06:10.096357 IP 185.21.217.51.34034 > 192.168.78.164.443: Flags [P.], seq 383582119:383582245, ack 1228613496, win 38, length 126
21:06:10.096588 IP 192.168.78.164.443 > 185.21.217.51.34034: Flags [P.], seq 1228613496:1228613547, ack 383582245, win 501, length 51
21:06:10.121482 IP 185.21.217.51.34034 > 192.168.78.164.443: Flags [P.], seq 383582245:383582345, ack 1228613547, win 38, length 100
21:06:10.121749 IP 192.168.78.164.443 > 185.21.217.51.34034: Flags [P.], seq 1228613547:1228614978, ack 383582345, win 501, length 1431
21:06:10.146792 IP 185.21.217.51.34034 > 192.168.78.164.443: Flags [P.], seq 383582345:383582376, ack 1228614978, win 40, length 31
21:06:10.146907 IP 192.168.78.164.443 > 185.21.217.51.34034: Flags [P.], seq 1228614978:1228615009, ack 383582376, win 501, length 31
21:06:10.146931 IP 192.168.78.164.443 > 185.21.217.51.34034: Flags [F.], seq 1228615009, ack 383582376, win 501, length 0
21:06:10.147568 IP 185.21.217.51.34034 > 192.168.78.164.443: Flags [F.], seq 383582376, ack 1228614978, win 40, length 0
21:06:10.147573 IP 192.168.78.164.443 > 185.21.217.51.34034: Flags [.], ack 383582377, win 501, length 0
21:06:10.171696 IP 185.21.217.51.34034 > 192.168.78.164.443: Flags [R], seq 383582376, win 0, length 0
21:06:10.171722 IP 185.21.217.51.34034 > 192.168.78.164.443: Flags [R], seq 383582376, win 0, length 0
21:06:10.172482 IP 185.21.217.51.34034 > 192.168.78.164.443: Flags [R], seq 383582377, win 0, length 0

21:49:09.999249 IP 5.186.33.87.51592 > 192.168.78.164.443: Flags [S], seq 2577736519, win 64240, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
21:49:09.999412 IP 192.168.78.164.443 > 5.186.33.87.51592: Flags [S.], seq 3425825559, ack 2577736520, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
21:49:10.254112 IP 5.186.33.87.51594 > 192.168.78.164.443: Flags [S], seq 2174498243, win 64240, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
21:49:10.254425 IP 192.168.78.164.443 > 5.186.33.87.51594: Flags [S.], seq 1029590757, ack 2174498244, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
21:49:11.000511 IP 5.186.33.87.51592 > 192.168.78.164.443: Flags [S], seq 2577736519, win 64240, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
21:49:11.000624 IP 192.168.78.164.443 > 5.186.33.87.51592: Flags [S.], seq 3425825559, ack 2577736520, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
21:49:11.262009 IP 5.186.33.87.51594 > 192.168.78.164.443: Flags [S], seq 2174498243, win 64240, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
21:49:11.262135 IP 192.168.78.164.443 > 5.186.33.87.51594: Flags [S.], seq 1029590757, ack 2174498244, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
21:49:12.010686 IP 192.168.78.164.443 > 5.186.33.87.51592: Flags [S.], seq 3425825559, ack 2577736520, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
21:49:12.266608 IP 192.168.78.164.443 > 5.186.33.87.51594: Flags [S.], seq 1029590757, ack 2174498244, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
21:49:13.014793 IP 5.186.33.87.51592 > 192.168.78.164.443: Flags [S], seq 2577736519, win 64240, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
21:49:13.014920 IP 192.168.78.164.443 > 5.186.33.87.51592: Flags [S.], seq 3425825559, ack 2577736520, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
21:49:13.265504 IP 5.186.33.87.51594 > 192.168.78.164.443: Flags [S], seq 2174498243, win 64240, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
21:49:13.265645 IP 192.168.78.164.443 > 5.186.33.87.51594: Flags [S.], seq 1029590757, ack 2174498244, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
21:49:15.046677 IP 192.168.78.164.443 > 5.186.33.87.51592: Flags [S.], seq 3425825559, ack 2577736520, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
21:49:15.274640 IP 192.168.78.164.443 > 5.186.33.87.51594: Flags [S.], seq 1029590757, ack 2174498244, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
21:49:17.022305 IP 5.186.33.87.51592 > 192.168.78.164.443: Flags [S], seq 2577736519, win 64240, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
21:49:17.022424 IP 192.168.78.164.443 > 5.186.33.87.51592: Flags [S.], seq 3425825559, ack 2577736520, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
21:49:17.277539 IP 5.186.33.87.51594 > 192.168.78.164.443: Flags [S], seq 2174498243, win 64240, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
21:49:17.277663 IP 192.168.78.164.443 > 5.186.33.87.51594: Flags [S.], seq 1029590757, ack 2174498244, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
21:49:21.226692 IP 192.168.78.164.443 > 5.186.33.87.51592: Flags [S.], seq 3425825559, ack 2577736520, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
21:49:21.482700 IP 192.168.78.164.443 > 5.186.33.87.51594: Flags [S.], seq 1029590757, ack 2174498244, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
21:49:29.414663 IP 192.168.78.164.443 > 5.186.33.87.51592: Flags [S.], seq 3425825559, ack 2577736520, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
21:49:29.670628 IP 192.168.78.164.443 > 5.186.33.87.51594: Flags [S.], seq 1029590757, ack 2174498244, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
  • drkt@feddit.dkOPtoSelfhosted@lemmy.world•rDNS, how?English
    1·
    1 year ago

    I’ve learned that the bad checksums are to to be ignored because it’s the NIC that’s responsible for it, so tcpdump sees the wrong checksums and it doesn’t matter. I have also learned that the Apache container actually does see the incoming connections. Here’s an example of my working connection and his connection.

    root ~ -> tcpdump -n port 443

## My machine to https://drkt.eu
15:44:50.985650 IP6 2a05:f6c7:8039:0:c859:8de4:257f:b4ff.53868 > 2a05:f6c7:8039::1337.443: Flags [S], seq 2232908482, win 64800, options [mss 1440,nop,wscale 8,nop,nop,sackOK], length 0
15:44:50.985656 IP6 2a05:f6c7:8039::1337.443 > 2a05:f6c7:8039:0:c859:8de4:257f:b4ff.53868: Flags [S.], seq 1276898910, ack 2232908483, win 64800, options [mss 1440,nop,nop,sackOK,nop,wscale 7], length 0
15:44:50.985780 IP6 2a05:f6c7:8039:0:c859:8de4:257f:b4ff.53868 > 2a05:f6c7:8039::1337.443: Flags [.], ack 1, win 8235, length 0
15:44:50.987032 IP6 2a05:f6c7:8039:0:c859:8de4:257f:b4ff.53868 > 2a05:f6c7:8039::1337.443: Flags [P.], seq 1:518, ack 1, win 8235, length 517
15:44:50.987040 IP6 2a05:f6c7:8039::1337.443 > 2a05:f6c7:8039:0:c859:8de4:257f:b4ff.53868: Flags [.], ack 518, win 503, length 0
15:44:50.987333 IP6 2a05:f6c7:8039::1337.443 > 2a05:f6c7:8039:0:c859:8de4:257f:b4ff.53868: Flags [P.], seq 1:4097, ack 518, win 503, length 4096
15:44:50.987566 IP6 2a05:f6c7:8039:0:c859:8de4:257f:b4ff.53868 > 2a05:f6c7:8039::1337.443: Flags [.], ack 4097, win 8235, length 0
15:44:50.988400 IP6 2a05:f6c7:8039::1337.443 > 2a05:f6c7:8039:0:c859:8de4:257f:b4ff.53868: Flags [P.], seq 4097:5381, ack 518, win 503, length 1284
15:44:50.988531 IP6 2a05:f6c7:8039:0:c859:8de4:257f:b4ff.53868 > 2a05:f6c7:8039::1337.443: Flags [.], ack 5381, win 8229, length 0
15:44:50.992091 IP6 2a05:f6c7:8039:0:c859:8de4:257f:b4ff.53868 > 2a05:f6c7:8039::1337.443: Flags [P.], seq 518:582, ack 5381, win 8229, length 64
15:44:50.992095 IP6 2a05:f6c7:8039:0:c859:8de4:257f:b4ff.53868 > 2a05:f6c7:8039::1337.443: Flags [P.], seq 582:1087, ack 5381, win 8229, length 505
15:44:50.992173 IP6 2a05:f6c7:8039::1337.443 > 2a05:f6c7:8039:0:c859:8de4:257f:b4ff.53868: Flags [.], ack 1087, win 501, length 0
15:44:50.992274 IP6 2a05:f6c7:8039::1337.443 > 2a05:f6c7:8039:0:c859:8de4:257f:b4ff.53868: Flags [P.], seq 5381:5668, ack 1087, win 501, length 287
15:44:50.992342 IP6 2a05:f6c7:8039::1337.443 > 2a05:f6c7:8039:0:c859:8de4:257f:b4ff.53868: Flags [P.], seq 5668:5955, ack 1087, win 501, length 287
15:44:50.992488 IP6 2a05:f6c7:8039:0:c859:8de4:257f:b4ff.53868 > 2a05:f6c7:8039::1337.443: Flags [.], ack 5955, win 8235, length 0
15:44:50.993404 IP6 2a05:f6c7:8039::1337.443 > 2a05:f6c7:8039:0:c859:8de4:257f:b4ff.53868: Flags [P.], seq 5955:10902, ack 1087, win 501, length 4947
15:44:50.993647 IP6 2a05:f6c7:8039:0:c859:8de4:257f:b4ff.53868 > 2a05:f6c7:8039::1337.443: Flags [.], ack 10902, win 8235, length 0
15:44:55.998521 IP6 2a05:f6c7:8039::1337.443 > 2a05:f6c7:8039:0:c859:8de4:257f:b4ff.53868: Flags [P.], seq 10902:10926, ack 1087, win 501, length 24
15:44:55.998547 IP6 2a05:f6c7:8039::1337.443 > 2a05:f6c7:8039:0:c859:8de4:257f:b4ff.53868: Flags [F.], seq 10926, ack 1087, win 501, length 0
15:44:55.998727 IP6 2a05:f6c7:8039:0:c859:8de4:257f:b4ff.53868 > 2a05:f6c7:8039::1337.443: Flags [P.], seq 1087:1111, ack 10926, win 8234, length 24
15:44:55.998733 IP6 2a05:f6c7:8039:0:c859:8de4:257f:b4ff.53868 > 2a05:f6c7:8039::1337.443: Flags [.], ack 10927, win 8234, length 0
15:44:55.998734 IP6 2a05:f6c7:8039:0:c859:8de4:257f:b4ff.53868 > 2a05:f6c7:8039::1337.443: Flags [F.], seq 1111, ack 10927, win 8234, length 0
15:44:55.998736 IP6 2a05:f6c7:8039::1337.443 > 2a05:f6c7:8039:0:c859:8de4:257f:b4ff.53868: Flags [.], ack 1112, win 501, length 0

## Office dude to https://drkt.eu
15:45:06.759198 IP 5.186.33.87.59842 > 192.168.78.164.443: Flags [S], seq 3042763137, win 64240, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
15:45:06.759210 IP 192.168.78.164.443 > 5.186.33.87.59842: Flags [S.], seq 4039717320, ack 3042763138, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
15:45:07.009444 IP 5.186.33.87.59843 > 192.168.78.164.443: Flags [S], seq 1050721154, win 64240, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
15:45:07.009455 IP 192.168.78.164.443 > 5.186.33.87.59843: Flags [S.], seq 1810250599, ack 1050721155, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
15:45:07.761986 IP 5.186.33.87.59842 > 192.168.78.164.443: Flags [S], seq 3042763137, win 64240, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
15:45:07.761994 IP 192.168.78.164.443 > 5.186.33.87.59842: Flags [S.], seq 4039717320, ack 3042763138, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
15:45:08.011014 IP 5.186.33.87.59843 > 192.168.78.164.443: Flags [S], seq 1050721154, win 64240, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
15:45:08.011023 IP 192.168.78.164.443 > 5.186.33.87.59843: Flags [S.], seq 1810250599, ack 1050721155, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
15:45:08.774730 IP 192.168.78.164.443 > 5.186.33.87.59842: Flags [S.], seq 4039717320, ack 3042763138, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
15:45:09.030829 IP 192.168.78.164.443 > 5.186.33.87.59843: Flags [S.], seq 1810250599, ack 1050721155, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
15:45:09.772318 IP 5.186.33.87.59842 > 192.168.78.164.443: Flags [S], seq 3042763137, win 64240, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
15:45:09.772327 IP 192.168.78.164.443 > 5.186.33.87.59842: Flags [S.], seq 4039717320, ack 3042763138, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
15:45:10.020444 IP 5.186.33.87.59843 > 192.168.78.164.443: Flags [S], seq 1050721154, win 64240, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
15:45:10.020452 IP 192.168.78.164.443 > 5.186.33.87.59843: Flags [S.], seq 1810250599, ack 1050721155, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
15:45:11.782726 IP 192.168.78.164.443 > 5.186.33.87.59842: Flags [S.], seq 4039717320, ack 3042763138, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
15:45:12.038818 IP 192.168.78.164.443 > 5.186.33.87.59843: Flags [S.], seq 1810250599, ack 1050721155, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
15:45:13.778722 IP 5.186.33.87.59842 > 192.168.78.164.443: Flags [S], seq 3042763137, win 64240, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
15:45:13.778730 IP 192.168.78.164.443 > 5.186.33.87.59842: Flags [S.], seq 4039717320, ack 3042763138, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
15:45:14.026072 IP 5.186.33.87.59843 > 192.168.78.164.443: Flags [S], seq 1050721154, win 64240, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
15:45:14.026082 IP 192.168.78.164.443 > 5.186.33.87.59843: Flags [S.], seq 1810250599, ack 1050721155, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
15:45:18.026717 IP 192.168.78.164.443 > 5.186.33.87.59842: Flags [S.], seq 4039717320, ack 3042763138, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
15:45:18.282740 IP 192.168.78.164.443 > 5.186.33.87.59843: Flags [S.], seq 1810250599, ack 1050721155, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
15:45:26.214732 IP 192.168.78.164.443 > 5.186.33.87.59842: Flags [S.], seq 4039717320, ack 3042763138, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
15:45:26.474741 IP 192.168.78.164.443 > 5.186.33.87.59843: Flags [S.], seq 1810250599, ack 1050721155, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
15:45:42.342747 IP 192.168.78.164.443 > 5.186.33.87.59842: Flags [S.], seq 4039717320, ack 3042763138, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
15:45:42.598745 IP 192.168.78.164.443 > 5.186.33.87.59843: Flags [S.], seq 1810250599, ack 1050721155, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
  • drkt@feddit.dkOPtoSelfhosted@lemmy.world•rDNS, how?English
    1·
    1 year ago
      5.186.33.87 > 89.150.135.135: ICMP echo request, id 1, seq 43476, length 40
12:38:19.843890 d0:50:99:81:48:17 > 4c:6d:58:4a:97:d4, ethertype IPv4 (0x0800), length 74: (tos 0x0, ttl 64, id 21715, offset 0, flags [none], proto ICMP (1), length 60, bad cksum 0 (->1dc0)!)
    89.150.135.135 > 5.186.33.87: ICMP echo reply, id 1, seq 43476, length 40
12:38:20.219177 d0:50:99:81:48:17 > 4c:6d:58:4a:97:d4, ethertype IPv4 (0x0800), length 43: (tos 0x0, ttl 64, id 32958, offset 0, flags [none], proto ICMP (1), length 29, bad cksum 0 (->3f6d)!)

    Packet capture from the router for 4 pings from him to me. 2 of 8 packets expected were captured and have bad checksums. Disregard, all 8 expected packets do show up

  • drkt@feddit.dkOPtoSelfhosted@lemmy.world•rDNS, how?English
    1·
    1 year ago

    Office friend still can’t ping me. The campus friend can ping me but can’t reach my website. I never trusted campus friend to be on a clean network so it’s a bit fruitless to test his connection.

    My ISP’s equipment is entirely a modem right now, bridging straight to my pfsense router. It’s not doing any weird filtering.

    Here are the results of those from office friend

    Server:  unifi.localdomain
Address:  192.168.0.1

Non-authoritative answer:
Name:    drkt.eu
Addresses:  2a05:f6c7:8039::1337
          89.150.135.135

Tracing route to drkt.eu [89.150.135.135]
over a maximum of 30 hops:

  1    <1 ms    <1 ms    <1 ms  unifi.localdomain [192.168.0.1]
  2     1 ms    <1 ms    <1 ms  5.186.33.65.static.fibianet.dk [5.186.33.65]
  3     4 ms     4 ms     3 ms  89.150.66.104
  4     4 ms     4 ms     4 ms  ae2.core01-tkbg.bb.fibianet.dk [89.150.64.25]
  5     *        *        *     Request timed out.
  6     3 ms     3 ms     3 ms  89.150.69.66
  7     2 ms     4 ms     2 ms  217.74.211.104
  8     3 ms     4 ms     4 ms  194.182.97.132
  9     4 ms     4 ms     3 ms  ae22-0.khk7nqp7.dk.ip.tdc.net [195.215.109.46]
 10     4 ms     4 ms     4 ms  ae1-0.khk7nqp8.dk.ip.tdc.net [83.88.12.15]
 11     3 ms     4 ms     4 ms  cpe.ae20-0.khk7nqp8.dk.customer.tdc.net [87.61.121.169]
 12     *        *        *     Request timed out.
 13     *        *        *     Request timed out.
 14     *        *        *     Request timed out.
 15     *        *        *     Request timed out.
 16     *        *        *     Request timed out.
 17     *        *        *     Request timed out.
 18     *        *        *     Request timed out.
 19     *        *        *     Request timed out.
 20     *        *        *     Request timed out.
 21     *        *        *     Request timed out.
 22     *        *        *     Request timed out.
 23     *        *        *     Request timed out.
 24     *        *        *     Request timed out.
 25     *        *        *     Request timed out.
 26     *        *        *     Request timed out.
 27     *        *        *     Request timed out.
 28     *        *        *     Request timed out.
 29     *        *        *     Request timed out.
 30     *        *        *     Request timed out.

Trace complete.

* Rebuilt URL to: https://drkt.eu/
*   Trying 89.150.135.135...
* TCP_NODELAY set
* connect to 89.150.135.135 port 443 failed: Timed out
* Failed to connect to drkt.eu port 443: Timed out
* Closing connection 0
curl: (7) Failed to connect to drkt.eu port 443: Timed out

    — UPDATE

    Office friends pinged me 4 times, all timed out on his end. His IP showed up in my state table and I captured these 2 packets

    State table:

    Interface Protocol  Source -> Destination            State  Packets 	Bytes 	
WAN 	icmp 	5.186.33.87:1 -> 89.150.135.135:1 	0:0 	4 / 4 	240 B / 240 B

    Packet capture: (the only 2, despite the 4 pings, and they have bad checksums?) All 8 expected packets show up but all do have bad checksums. I’m seeing a LOT of bad checksums. A known working connection from fourth friend did not show bad checksums in this same test.

        5.186.33.87 > 89.150.135.135: ICMP echo request, id 1, seq 43476, length 40
12:38:19.843890 d0:50:99:81:48:17 > 4c:6d:58:4a:97:d4, ethertype IPv4 (0x0800), length 74: (tos 0x0, ttl 64, id 21715, offset 0, flags [none], proto ICMP (1), length 60, bad cksum 0 (->1dc0)!)
    89.150.135.135 > 5.186.33.87: ICMP echo reply, id 1, seq 43476, length 40
12:38:20.219177 d0:50:99:81:48:17 > 4c:6d:58:4a:97:d4, ethertype IPv4 (0x0800), length 43: (tos 0x0, ttl 64, id 32958, offset 0, flags [none], proto ICMP (1), length 29, bad cksum 0 (->3f6d)!)

    He went to my domain while I was collecting packets from ANY protocol filtering his IP It’s a bit long, so here’s the cap file https://u.drkt.eu/iiUsH7.cap

  • drkt@feddit.dkOPtoSelfhosted@lemmy.world•rDNS, how?English
    1·
    1 year ago

    I have an ISP issued fiber modem that goes straight into my pfsense box. For IPv4 I have NAT and Firewall, for v6 it’s just the firewall. It should be noted that I’ve been hosting with this setup for years and it wasn’t a problem until I got this ISP at this location. I’ve had this ISP elsewhere without problems and another ISP here where it also wasn’t a problem.

    The traceroutes getting dropped was a misconfiguration in my firewall on my part, it should work now!

    My friend across town can now ping me successfully but going to my website still gives him ERR_CONNECTION_TIMED_OUT in browser.

    EDIT ----------

    I got another troublesome user to run a quick test with the new firewall config. Also can’t reach my website. Pings DO time out for him! Traceroute expectedly also fails, last hop was cpe.ae20-0.khk7nqp8.dk.costumer.tdc.net [87.61.121.169]

  • drkt@feddit.dkOPtoSelfhosted@lemmy.world•rDNS, how?English
    0·
    1 year ago

    Copied this from another comment I made

    A number of people can’t route to me at all. My domain is drkt.eu and sits on port 80 and 443 @ 89.150.135.135 and 2a05:f6c7:8039::1337

    IPv6 is not big in my country, and I don’t think anyone afflicted has IPv6 so I can’t tell you if this affects both v4 and v6.

    It’s not a DNS issue, as the afflicted users can get the correct IPs from nslookup.

    Mullvad VPN users are consistently unable to route to me.

    One friend can’t route to me from his workplace network. It’s a small network and their admin claims they don’t block anything so it’s a mystery to him as well.

    Another friend across town can’t reach my network despite being so close to me hop-wise, but his network is run by wacks and is consequently also quite wack. I can’t confidently say this is the same issue.

    I’m not dropping any connections for any reason. My ISP claims they aren’t doing any blocking of domains or IPs.

    Traceroutes time out at consistent hops but it’s different per afflicted network. The only recurring name has been costumer.tdc.net

    It might not be related, but I can’t route to catbox.moe and their admin says my IPs are not blacklisted in any of their systems.

  • drkt@feddit.dkOPtoSelfhosted@lemmy.world•rDNS, how?English
    0·
    1 year ago

    I would pay you money if you can fix this issue.

    A number of people can’t route to me at all. My domain is drkt.eu and sits on port 80 and 443 @ 89.150.135.135 and 2a05:f6c7:8039::1337

    IPv6 is not big in my country, and I don’t think anyone afflicted has IPv6 so I can’t tell you if this affects both v4 and v6.

    It’s not a DNS issue, as the afflicted users can get the correct IPs from nslookup.

    Mullvad VPN users are consistently unable to route to me.

    One friend can’t route to me from his workplace network. It’s a small network and their admin claims they don’t block anything so it’s a mystery to him as well.

    Another friend across town can’t reach my network despite being so close to me hop-wise, but his network is run by wacks and is consequently also quite wack. I can’t confidently say this is the same issue.

    I’m not dropping any connections for any reason. My ISP claims they aren’t doing any blocking of domains or IPs.

    Traceroutes time out at consistent hops but it’s different per afflicted network. The only recurring name has been costumer.tdc.net

    It might not be related, but I can’t route to catbox.moe and their admin says my IPs are not blacklisted in any of their systems.

    What’s your input?

  • drkt@feddit.dkOPtoSelfhosted@lemmy.world•rDNS, how?English
    1·
    1 year ago

    No emails just routing issues.

    Copy pasted but I have routing issues that neither my ISP nor the people who suffer from it can pinpoint. I’m so far down this rabbit hole that I’m assuming my IP got on a blacklist that’s sitting on some random networking infrastructure and I’m just trying to resolve all blacklist issues on the off chance that it works.

  • drkt@feddit.dkOPtoSelfhosted@lemmy.world•rDNS, how?English
    1·
    1 year ago

    No emails just routing issues.

    Copy pasted but I have routing issues that neither my ISP nor the people who suffer from it can pinpoint. I’m so far down this rabbit hole that I’m assuming my IP got on a blacklist that’s sitting on some random networking infrastructure and I’m just trying to resolve all blacklist issues on the off chance that it works.

  • drkt@feddit.dkOPtoSelfhosted@lemmy.world•rDNS, how?English
    1·
    1 year ago

    I want to, but I have routing issues that neither my ISP nor the people who suffer from it can pinpoint. I’m so far down this rabbit hole that I’m assuming my IP got on a blacklist that’s sitting on some random networking infrastructure and I’m just trying to resolve all blacklist issues on the off chance that it works.

  • drkt@feddit.dkOPtoSelfhosted@lemmy.world•rDNS, how?English
    2·
    1 year ago

    I would love to tell you why they do this, but I can’t. I can only tell you that they tell me it’s because I don’t have rDNS

    These guys are blocking me http://www.uceprotect.net/en/rblcheck.php “Level 1 HIGH DNS problem WARNING: No Reverse-DNS (PTR) is assigned to your IP”

    These guys are blocking a friend of mine who has the same setup as me https://matrix.spfbl.net " No rDNS was found. This IP has been flagged because have none valid FCrDNS. Register a valid rDNS for this IP, which points to the same IP. The rDNS must be registered under your own domain for you be able to delist it."