AS overview
Test target: 2a00:ca0::1 · (no live host found) · address space: PA · prefixes announced: 8
prefix(es): 2a00:ca0::/32, 2a00:ca0:201d::/48, 2a00:ca0:2005::/48, 2a00:ca0:2001::/48, 2a00:ca0:2003::/48, 2a00:ca0:2004::/48, 2a00:ca0:2002::/48, 2a03:b7c0::/32
RPKI & ASPA
7 of 8 prefix(es) covered by a valid ROA, 1 not-found.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a00:ca0::/32 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS29286 /32 maxLen 32 (ripe) |
2a00:ca0:201d::/48 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS29286 /48 maxLen 48 (ripe); AS29286 /32 maxLen 32 (ripe) |
2a00:ca0:2005::/48 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS29286 /48 maxLen 48 (ripe); AS29286 /32 maxLen 32 (ripe) |
2a00:ca0:2001::/48 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS29286 /48 maxLen 48 (ripe); AS29286 /32 maxLen 32 (ripe) |
2a00:ca0:2003::/48 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS29286 /48 maxLen 48 (ripe); AS29286 /32 maxLen 32 (ripe) |
2a00:ca0:2004::/48 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS29286 /48 maxLen 48 (ripe); AS29286 /32 maxLen 32 (ripe) |
2a00:ca0:2002::/48 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS29286 /48 maxLen 48 (ripe); AS29286 /32 maxLen 32 (ripe) |
2a03:b7c0::/32 | - not-found | no covering VRP |
Random-IP probe (yarrp) into the AS' prefixes
At least one router inside AS29286's announced prefix replied during the random-target probe. Hop(s): 2a00:ca0:0:12d5::1. These are candidate targets for direct testing.
ICMPv6 Type 2 (Packet Too Big) acceptance - active test
Type 2 active test inconclusive: no Echo Reply to 1300-byte probe.
method: ICMPv6 Echo + forged PTB, tested 2026-05-25T12:29:47Z
Failure detail — what to grep in your logs
| vantage | our source | your target | method | result | tested (UTC) |
|---|---|---|---|---|---|
| go6lab | 2a00:8642:42::75 | 2a00:ca0::1 | icmp6-echo | no_echo | 2026-05-25T12:29:47Z |
| karsolink | 2a12:d8c0:105a:9001::a154 | 2a00:ca0::1 | icmp6-echo | no_echo | 2026-05-25T12:33:44Z |
| odin | 2607:fae0:a000::42 | 2a00:ca0::1 | icmp6-echo | no_echo | 2026-05-25T12:29:36Z |
Attempt log (go6lab):
icmp6-echo→ no_echo: no Echo Reply to 1300-byte probedns-tcp→ no_tcp: connect failed: timed outtls→ no_tcp: TLS connect failedhttp→ no_tcp: tcp/80 not open
Attempt log (karsolink):
icmp6-echo→ no_echo: no Echo Reply to 1300-byte probedns-tcp→ no_tcp: connect failed: timed outtls→ no_tcp: TLS connect failedhttp→ no_tcp: tcp/80 not open
Attempt log (odin):
icmp6-echo→ no_echo: no Echo Reply to 1300-byte probedns-tcp→ no_tcp: connect failed: timed outtls→ no_tcp: TLS connect failedhttp→ no_tcp: tcp/80 not open
To match the corresponding ICMPv6 packet on your side (host firewall, AS edge, or transit tap), look for our PTBs around the timestamps above:
sudo tcpdump -i any -n -e 'icmp6 and ip6[40] = 2 and (src host 2607:fae0:a000::42 or src host 2a00:8642:42::75 or src host 2a12:d8c0:105a:9001::a154)'
If you see our PTBs arriving but the destination's TCP/Echo flow does not shrink, the drop is in the destination kernel (cause 3 below). If you don't see them at all, drop is upstream of you (cause 2). If you only see them from one of our two source IPs, the drop is path-asymmetric — one transit on the asymmetric route is filtering, the other is not.
From NL host (go6lab) transit only unreachable
filter likely at: past AS174 (COGENT-174) · min PMTU on path: 1500
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | 2a00:8642:42::3 | 0.9ms | 0% | AS203993 | STEFFANN-DC-AS - S.J.M. Steffann, NL |
| 2 | * | - | 0%* | - | |
| 3 | 2a00:1ca8:1::194 | 2.3ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 4 | 2a03:3f40::10:41 | 2.7ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 5 | * | - | - | - | |
| 6 | * | - | 90% | - | |
| 7 | be2950.ccr42.fra05.atlas.cogentco.com 2001:550:0:1000::9a36:482a | 11.4ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 8 | be7942.agr63.fra05.atlas.cogentco.com 2001:550:0:1000::9a36:3911 | 11.5ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 9 | be5288.nr51.b015923-1.fra05.atlas.cogentco.com 2001:550:0:1000::9a19:1125 | 10.9ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - | |
| 20 | * | - | - | - | |
| 21 | * | - | - | - | |
| 22 | * | - | - | - | |
| 23 | * | - | - | - | |
| 24 | * | - | - | - |
Rate-limited ICMPv6: hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.038ms pmtu 1500
1: 2a00:8642:42::3 1.389ms
1: 2a00:8642:42::3 1.524ms
2: gw.friends.steffann.nl 1.973ms
3: 2a00:1ca8:1::194 2.779ms
4: 2a03:3f40::10:41 2.306ms
5: no reply
6: no reply
7: be2950.ccr42.fra05.atlas.cogentco.com 11.591ms
8: be5200.agr63.fra05.atlas.cogentco.com 11.082ms
9: be5287.nr51.b015923-1.fra05.atlas.cogentco.com 12.133ms
10: no reply
11: no reply
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
18: no reply
19: no reply
20: no reply
21: no reply
22: no reply
23: no reply
24: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500 From ITA host (Karsolink) transit only unreachable
filter likely at: past AS41327 (FIBERTELECOM-AS) · min PMTU on path: 1500
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | * | - | 0%* | - | |
| 2 | * | - | 0%* | - | |
| 3 | * | - | 40% | - | |
| 4 | 2a03:b020:1:51::a | 10.1ms | 0% | AS41327 | FIBERTELECOM-AS - Fiber Telecom S.p.A., IT |
| 5 | 2a03:b020::247 | 10.4ms | 0% | AS41327 | FIBERTELECOM-AS - Fiber Telecom S.p.A., IT |
| 6 | * | - | - | - | |
| 7 | * | - | - | - | |
| 8 | * | - | - | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - | |
| 20 | * | - | - | - | |
| 21 | * | - | - | - | |
| 22 | * | - | - | - | |
| 23 | * | - | - | - | |
| 24 | * | - | - | - |
Rate-limited ICMPv6: hop 3 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.030ms pmtu 1500
1: karsolink-01.net.karsolink.com 0.653ms
1: karsolink-01.net.karsolink.com 0.587ms
2: 2a12:d8c0:109f:121::a1 0.826ms
3: 2a12:d8c0:101f:6::1 10.107ms
4: 2a03:b020:1:51::a 10.534ms
5: 2a03:b020::247 10.840ms
6: no reply
7: no reply
8: no reply
9: no reply
10: no reply
11: no reply
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
18: no reply
19: no reply
20: no reply
21: no reply
22: no reply
23: no reply
24: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500 From SLO host (6connect) transit only unreachable
filter likely at: past AS5603 (SIOL-NET) · min PMTU on path: 1500
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | fw1-lju.6connect.com 2607:fae0:a000::2 | 0.3ms | 0%* | AS8038 | 6CONNECT - 6connect, Inc., US |
| 2 | * | - | 0%* | - | |
| 3 | * | - | 30% | - | |
| 4 | 2a00:ee0:1:15::2 | 0.9ms | 0% | AS5603 | SIOL-NET - Telekom Slovenije, d.d., SI |
| 5 | * | - | - | - | |
| 6 | * | - | - | - | |
| 7 | * | - | - | - | |
| 8 | * | - | - | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - | |
| 20 | * | - | - | - | |
| 21 | * | - | - | - | |
| 22 | * | - | - | - | |
| 23 | * | - | - | - | |
| 24 | * | - | - | - |
Rate-limited ICMPv6: hop 3 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.034ms pmtu 1500
1: fw1-lju.6connect.com 0.458ms
1: fw1-lju.6connect.com 0.423ms
2: ccr-to-fw-ccr1-gw-lju.6connect.com 0.641ms
3: 2a00:ee1:800:9::1 2.143ms
4: 2a00:ee0:1:10::2 1.308ms asymm 3
5: no reply
6: no reply
7: no reply
8: no reply
9: no reply
10: no reply
11: no reply
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
18: no reply
19: no reply
20: no reply
21: no reply
22: no reply
23: no reply
24: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500