AS overview
Test target: 2a03:7e40::10 · ftp.etruriawifi.net · address space: PA · prefixes announced: 6
prefix(es): 2a03:7e40:6000::/36, 2a03:7e40:1000::/36, 2a03:7e40:2000::/36, 2a03:7e40:5000::/36, 2a03:7e40:4000::/36, 2a03:7e40::/36
Targets & per-vantage-point probe results (1 target(s) across 7 vantage point(s))
Source codes (hover any badge for full description): CUR=curated · NS/SOA/MX=DNS records · SPF=SPF TXT · DRV=holder-derived (www, ns1, mail, gw, …) · ATL=RIPE Atlas · PDB=PeeringDB · WHOIS=RIPE whois · RDAP=RIPE RDAP · HIT=IPv6 Hitlist · RTR=in-prefix path hop (router) · PRB=static prefix probe · SYN=synthetic prefix::1 fallback
| Target IP / hostname | Source | SRB host (SOX, Belgrade) | DE host (Berlin) | DE host (Düsseldorf) | NL host (go6lab) | ITA host (Karsolink) | SLO host (6connect) | SLO host (T-2) | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ping | 1500B | :80 | :443 | reached | ping | 1500B | :80 | :443 | reached | ping | 1500B | :80 | :443 | reached | ping | 1500B | :80 | :443 | reached | ping | 1500B | :80 | :443 | reached | ping | 1500B | :80 | :443 | reached | ping | 1500B | :80 | :443 | reached | ||
2a03:7e40::10ftp.etruriawifi.net | drv | ✗ | ✗ | ? | ? | - | ✗ | ✗ | ? | ? | - | ✗ | ✗ | ? | ? | - | ✗ | ✗ | ? | ? | - | ✗ | ✗ | ? | ? | - | ✗ | ✗ | ? | ? | - | ✗ | ✗ | ? | ? | - |
RPKI & ASPA
6 of 6 prefix(es) covered by a valid ROA.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a03:7e40:6000::/36 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS201565 /36 maxLen 36 (ripe) |
2a03:7e40:1000::/36 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS201565 /36 maxLen 36 (ripe) |
2a03:7e40:2000::/36 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS201565 /36 maxLen 36 (ripe) |
2a03:7e40:5000::/36 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS201565 /36 maxLen 36 (ripe) |
2a03:7e40:4000::/36 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS201565 /36 maxLen 36 (ripe) |
2a03:7e40::/36 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS201565 /36 maxLen 36 (ripe) |
Random-IP probe (yarrp) into the AS' prefixes
At least one router inside AS201565's announced prefix replied during the random-target probe. Hop(s): 2a03:7e40:6000::4. 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 2026-09-23T12:03:27Z
Failure detail - what to grep in your logs
| vantage | our source | your target | method | result | tested (UTC) |
|---|---|---|---|---|---|
| belgrade | 2a09:ab81::91 | 2a03:7e40::10 | icmp6-echo | no_echo | 2026-09-23T12:03:27Z |
| berlin | 2a06:d1c1:10b::cccc | 2a03:7e40::10 | icmp6-echo | no_echo | 2026-09-23T12:03:26Z |
| duseldorf | 2a06:d1c1:10d::aaaa | 2a03:7e40::10 | icmp6-echo | no_echo | 2026-09-23T12:03:26Z |
| go6lab | 2a00:8642:42::75 | 2a03:7e40::10 | icmp6-echo | no_echo | 2026-09-23T12:04:29Z |
| karsolink | 2a12:d8c0:105a:9001::a154 | 2a03:7e40::10 | icmp6-echo | no_echo | 2026-09-23T12:03:26Z |
| odin | 2607:fae0:a000::42 | 2a03:7e40::10 | icmp6-echo | no_echo | 2026-09-23T12:03:26Z |
| t2 | 2a01:261:313:b814:2a0:98ff:fe5b:13e4 | 2a03:7e40::10 | icmp6-echo | no_echo | 2026-09-23T12:03:27Z |
Attempt log (belgrade):
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 (berlin):
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 (duseldorf):
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 (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
Attempt log (t2):
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 2a01:261:313:b814:2a0:98ff:fe5b:13e4 or src host 2a06:d1c1:10b::cccc or src host 2a06:d1c1:10d::aaaa or src host 2a09:ab81::91 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 some of our source IPs but not others, the drop is path-asymmetric - at least one transit on the differing route is filtering.
Multi-vantage path map
Every hop of all vantages’ traceroutes toward the target, drawn left→right, grouped into per-AS bubbles (a hop seen from several vantages is one shared bubble, so converging paths merge). It answers two questions per vantage — shown on each source bubble as echo ✓/⚠/✗ · trace ✓/✗: did the destination reply to ICMPv6 Echo (✓ honored, ⚠ replied but PTB not honored, ✗ no reply), and did the traceroute reach it. A line to the target is drawn only when that vantage got an echo reply — solid if the PTB was honored, dashed if not (reachable but a broken-PMTUD / RFC 4890 violation). The path depth still shows how far the traceroute itself got, and runs of unanswered (* *) hops collapse into one dashed “silent” bubble. Open full size ↗
- ● SRB host (SOX, Belgrade)
- ● DE host (Berlin)
- ● DE host (Düsseldorf)
- ● NL host (go6lab)
- ● ITA host (Karsolink)
- ● SLO host (6connect)
- ● SLO host (T-2)
- ── solid line = echo reply, PTB honored (clean reach)
- — — dashed line = echo reply but PTB not honored (RFC 4890 violation)
- no line = no echo reply (never reached)
- ◉ target: green = clean, amber = reachable-but-violation / unreachable
- ⚠ suspected drop AS
- ⋯ silent (unanswered) hops
- ● IXP hop
From SRB host (SOX, Belgrade) all blocked
filter likely at: before path completes · min PMTU on path: 1500
0/4
Echo small (56B) -
0/4
Echo 1500B (DF) -
no
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | 2a09:ab81::1 | 0.3ms | 0%* | AS60733 | PERKE-NET - ZORAN PEROVIC trading as Agencija Perke.NET, RS |
| 2 | sox-pn.sox.rs 2001:7f8:1e:8::3a | 0.2ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 3 | 2001:7f8:1e:8::3d | 0.3ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 4 | 2001:67c:128c::699 | 17.7ms | 0% | - | NA |
| 5 | * | - | - | - | |
| 6 | * | - | - | - | |
| 7 | * | - | - | - | |
| 8 | * | - | - | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.035ms pmtu 1500
1: _gateway 0.405ms
1: _gateway 0.577ms
2: sox-pn.sox.rs 0.755ms
3: 2001:7f8:1e:8::3d 0.819ms asymm 2
4: 2001:67c:128c::699 71.260ms
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
Too many hops: pmtu 1500
Resume: pmtu 1500 From DE host (Berlin) all blocked
filter likely at: past AS3257 (GTT-BACKBONE) · min PMTU on path: 1500
0/4
Echo small (56B) -
0/4
Echo 1500B (DF) -
no
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | xe-0-0-13-178.gw01.ber01.as59645.net 2a06:d1c1:100:b::1 | 0.4ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 2 | ae0-2453.cr10.ber01.lwlcom.net 2a06:d1c0::dead:beef:1c02 | 0.6ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 3 | ae0-150.cr10.fra01.lwlcom.net 2a00:c380:b200:230::174 | 10.2ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 4 | ae6-3257.cr5-fra2.ip6.gtt.net 2001:668:0:3:ffff:1:0:3d5d | 9.6ms | 0% | AS3257 | GTT-BACKBONE - GTT Communications Inc., US |
| 5 | 2001:668:0:2:ffff:0:5995:b895 | 26.9ms | 0% | AS3257 | GTT-BACKBONE - GTT Communications Inc., US |
| 6 | 2001:668:0:3:ffff:1:0:210e | 28.2ms | 0% | AS3257 | GTT-BACKBONE - GTT Communications Inc., US |
| 7 | * | - | - | - | |
| 8 | * | - | - | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.023ms pmtu 1500
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.759ms
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.794ms
2: ae0-2453.cr10.ber01.lwlcom.net 1.264ms
3: ae0-150.cr10.fra01.lwlcom.net 10.526ms asymm 7
4: ae6-3257.cr5-fra2.ip6.gtt.net 9.946ms asymm 9
5: 2001:668:0:2:ffff:0:5995:b895 27.088ms asymm 9
6: 2001:668:0:3:ffff:1:0:210e 28.222ms asymm 10
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
Too many hops: pmtu 1500
Resume: pmtu 1500 From DE host (Düsseldorf) all blocked
filter likely at: past AS3257 (GTT-BACKBONE) · min PMTU on path: 1500
0/4
Echo small (56B) -
0/4
Echo 1500B (DF) -
no
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | xe-0-0-12-142.gw01.dus01.as59645.net 2a06:d1c1:100:d::1 | 0.2ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 2 | eth1-0-12-h5594.edge5-dus1.bb.wiit.network 2001:4ba0:92f4:3::1 | 0.9ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 3 | * | - | - | - | |
| 4 | lag11.core3-dus1.bb.wiit.network 2001:4ba0:ffe9:115::3 | 0.2ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 5 | lag2.core1-dus-ix.bb.wiit.network 2001:4ba0:ffe9:4f::1 | 0.4ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 6 | lag10.core2-dus-ix.bb.wiit.network 2001:4ba0:ffe9:17a::3 | 0.5ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 7 | ae9-846.cr4-dus1.ip6.gtt.net 2001:668:0:3:ffff:1:0:3e75 | 0.4ms | 0% | AS3257 | GTT-BACKBONE - GTT Communications Inc., US |
| 8 | 2001:668:0:2:ffff:0:5995:b895 | 20.2ms | 0% | AS3257 | GTT-BACKBONE - GTT Communications Inc., US |
| 9 | 2001:668:0:3:ffff:1:0:210e | 21.5ms | 0% | AS3257 | GTT-BACKBONE - GTT Communications Inc., US |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.018ms pmtu 1500
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.303ms
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.293ms
2: eth1-0-12-h5594.edge5-dus1.bb.wiit.network 1.169ms
3: no reply
4: lag30.core3-dus1.bb.wiit.network 0.405ms
5: lag8.core1-dus-ix.bb.wiit.network 0.570ms
6: lag10.core2-dus-ix.bb.wiit.network 0.628ms
7: ae9-846.cr4-dus1.ip6.gtt.net 0.766ms
8: 2001:668:0:2:ffff:0:5995:b895 20.351ms
9: 2001:668:0:3:ffff:1:0:210e 21.725ms
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
Too many hops: pmtu 1500
Resume: pmtu 1500 From NL host (go6lab) all blocked
filter likely at: past AS3257 (GTT-BACKBONE) · min PMTU on path: 1500
0/4
Echo small (56B) -
0/4
Echo 1500B (DF) -
no
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | 2a00:8642:42::2 | 4.1ms | 0% | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 2 | gw.friends.steffann.nl 2a00:8642:1000:f000::1 | 3.1ms | 0%* | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 3 | 2a00:1ca8:1::194 | 3.7ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 4 | 2a03:3f40::10:41 | 2.8ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 5 | 2001:978:2:40::3:1 | 4.0ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 6 | be3458.ccr42.ams03.atlas.cogentco.com 2001:550:0:1000::9a36:27b9 | 6.8ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 7 | 2001:978:3::52 | 16.0ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 8 | 2001:668:0:2:ffff:0:5995:b895 | 33.8ms | 0% | AS3257 | GTT-BACKBONE - GTT Communications Inc., US |
| 9 | 2001:668:0:3:ffff:1:0:210e | 35.0ms | 0% | AS3257 | GTT-BACKBONE - GTT Communications Inc., US |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.039ms pmtu 1500
1: 2a00:8642:42::2 3.802ms
1: 2a00:8642:42::2 2.148ms
2: gw.friends.steffann.nl 4.909ms
3: 2a00:1ca8:1::194 3.667ms
4: 2a03:3f40::10:41 11.120ms
5: 2001:978:2:40::3:1 7.727ms
6: be3457.ccr41.ams03.atlas.cogentco.com 10.144ms
7: ae1.cr9-ams1.ip6.gtt.net 21.858ms asymm 16
8: 2001:668:0:2:ffff:0:5995:b895 34.118ms asymm 12
9: 2001:668:0:3:ffff:1:0:210e 372.019ms asymm 12
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
Too many hops: pmtu 1500
Resume: pmtu 1500 From ITA host (Karsolink) all blocked
filter likely at: past AS3257 (GTT-BACKBONE) · min PMTU on path: 1500
0/4
Echo small (56B) -
0/4
Echo 1500B (DF) -
no
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | karsolink-01.net.karsolink.com 2a12:d8c0:105a:9001::1 | 0.3ms | - | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 2 | * | - | 0%* | - | |
| 3 | * | - | 90% | - | |
| 4 | 2a02:2d8:4:1815:232a | 10.5ms | 0% | - | |
| 5 | ae16-100.cr4-mil2.ip6.gtt.net 2001:668:0:3:ffff:0:d5fe:dc4d | 10.0ms | 0% | AS3257 | GTT-BACKBONE - GTT Communications Inc., US |
| 6 | ae20.cr3-vie2.ip6.gtt.net 2001:668:0:3:ffff:1:0:3561 | 16.2ms | 0% | AS3257 | GTT-BACKBONE - GTT Communications Inc., US |
| 7 | 2001:668:0:2:ffff:0:5995:b895 | 17.4ms | 0% | AS3257 | GTT-BACKBONE - GTT Communications Inc., US |
| 8 | 2001:668:0:3:ffff:1:0:210e | 18.7ms | - | AS3257 | GTT-BACKBONE - GTT Communications Inc., US |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - |
Rate-limited ICMPv6: hop 3 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.046ms pmtu 1500
1: karsolink-01.net.karsolink.com 0.888ms
1: no reply
2: no reply
3: no reply
4: 2a03:b020:1:51::a 43.176ms
5: rt.mix.mil.it.retn.net 7.230ms
6: ae20.cr3-vie2.ip6.gtt.net 16.709ms asymm 9
7: 2001:668:0:3:ffff:1:0:210e 20.075ms
8: 2001:668:0:3:ffff:1:0:210e 23.741ms asymm 7
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
Too many hops: pmtu 1500
Resume: pmtu 1500 From SLO host (6connect) all blocked
filter likely at: past AS3257 (GTT-BACKBONE) · min PMTU on path: 1500
0/4
Echo small (56B) -
0/4
Echo 1500B (DF) -
no
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | fw1-lju.6connect.com 2607:fae0:a000::2 | 0.5ms | 0%* | AS8038 | 6CONNECT - 6connect, Inc., US |
| 2 | ccr-to-fw-ccr1-gw-lju.6connect.com 2607:fae0:a000:2::2 | 0.5ms | - | AS8038 | 6CONNECT - 6connect, Inc., US |
| 3 | 2a03:a100:0:201:1::1 | 0.8ms | 0% | AS56635 | XENYA - XENYA inzeniring, proizvodnja in trgovina, d.o.o. Ljubljana, SI |
| 4 | * | - | - | - | |
| 5 | 100ge0-0-0-5.core1.vie1.he.net 2001:470:0:578::1 | 9.0ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | be3.core1.prg1.he.net 2001:470:e:a7::1 | 13.1ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | be8.core4.fra1.he.net 2001:470:e:1e::1 | 18.7ms | 50% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 8 | be2.core3.ams1.he.net 2001:470:e:38::1 | 24.6ms | 20% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 9 | be3.core4.lon2.he.net 2001:470:e:49::2 | 29.2ms | 50% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 10 | 2001:7f8:4::cb9:1 | 29.7ms | 0% | - | NA |
| 11 | 2001:668:0:2:ffff:0:5995:b895 | 45.2ms | 0% | AS3257 | GTT-BACKBONE - GTT Communications Inc., US |
| 12 | 2001:668:0:3:ffff:1:0:210e | 46.2ms | 0% | AS3257 | GTT-BACKBONE - GTT Communications Inc., US |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - |
Rate-limited ICMPv6: hop 7, hop 8, hop 9 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.020ms pmtu 9000
1: fw1-lju.6connect.com 0.736ms
1: fw1-lju.6connect.com 0.560ms
2: no reply
3: 2a03:a100:0:201:1::1 1.129ms
4: 2a03:a100:0:201:1::1 0.744ms pmtu 1500
4: e0-1.core1.lju1.he.net 2.589ms
5: 100ge0-0-0-5.core1.vie1.he.net 9.459ms
6: be3.core1.prg1.he.net 13.004ms
7: be8.core4.fra1.he.net 19.143ms
8: be2.core3.ams1.he.net 25.611ms
9: be3.core4.lon2.he.net 30.677ms
10: 2001:7f8:4::cb9:1 30.053ms
11: 2001:668:0:2:ffff:0:5995:b895 45.387ms asymm 16
12: 2001:668:0:3:ffff:1:0:210e 46.522ms asymm 11
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
18: no reply
Too many hops: pmtu 1500From SLO host (T-2) all blocked
filter likely at: past AS3257 (GTT-BACKBONE) · min PMTU on path: 1500
0/4
Echo small (56B) -
0/4
Echo 1500B (DF) -
no
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | 2a01:261:313:b814::1 | 0.5ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 2 | 2a01:260:1::225 | 2.1ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 3 | 2a01-260-1-1--9c.core6.t-2.net 2a01:260:1:1::9c | 2.2ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 4 | hurricane-electric.nikhef.nlsix.net 2001:7f8:13::a500:6939:1 | 35.0ms | 0% | - | NA |
| 5 | * | - | - | - | |
| 6 | be47.core3.ams1.he.net 2001:470:e:12::2 | 37.3ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | be47.core3.ams1.he.net 2001:470:e:12::2 | 32.8ms | 20% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 8 | 2001:7f8:4::cb9:1 | 38.0ms | 0% | - | NA |
| 9 | 2001:7f8:4::cb9:1 | 45.9ms | 0% | - | NA |
| 10 | 2001:668:0:2:ffff:0:5995:b895 | 54.6ms | 0% | AS3257 | GTT-BACKBONE - GTT Communications Inc., US |
| 11 | 2001:668:0:3:ffff:1:0:210e | 50.7ms | - | AS3257 | GTT-BACKBONE - GTT Communications Inc., US |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - |
Rate-limited ICMPv6: hop 7 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.026ms pmtu 1500
1: no reply
2: 2a01:260:1::225 5.637ms
3: 2a01-260-1-1--9a.core6.t-2.net 3.455ms
4: hurricane-electric.nikhef.nlsix.net 35.006ms
5: no reply
6: be47.core3.ams1.he.net 33.590ms
7: be47.core3.ams1.he.net 52.183ms asymm 6
8: 2001:7f8:4::cb9:1 37.648ms
9: 2001:7f8:4::cb9:1 38.852ms asymm 8
10: 2001:668:0:2:ffff:0:5995:b895 52.952ms asymm 9
11: 2001:668:0:3:ffff:1:0:210e 53.946ms asymm 9
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
18: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500