AS overview
Test target: 2a07:73c4::1 · static prefix probe · address space: PA · prefixes announced: 2
prefix(es): 2a07:73c0::/30, 2a07:73c4::/30
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 | ||
2a07:73c4::1 | prb | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✗ | ✗ | ? | ? | - |
MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO peering
MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO member - Open peering, peering member, since 2019-10-22. IPv6 LAN: -. Locations: -.
RPKI & ASPA
2 of 2 prefix(es) covered by a valid ROA.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a07:73c0::/30 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS49535 /30 maxLen 30 (ripe); AS49535 /29 maxLen 29 (ripe) |
2a07:73c4::/30 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS49535 /30 maxLen 30 (ripe); AS49535 /29 maxLen 29 (ripe) |
Random-IP probe (yarrp) into the AS' prefixes
We probed 70 arbitrary IPv6 address(es) inside AS49535's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2001:978:2:2a::e0:2 at hop 19 - that router answers ICMPv6 Echo. This is not in AS49535's announced prefix; operationally it's the AS-edge / peering interface (often on an IXP peering address or an upstream's /127 link). The traceroute boundary is the AS edge: ICMPv6 Time-Exceeded responses from anything inside this AS are filtered.
ICMPv6 Type 2 (Packet Too Big) acceptance - active test
Vantage points disagree about Type 2 acceptance - transit ASes on one path may be filtering Type 2 even though the destination's stack accepts it on another path:
- SRB host (SOX, Belgrade): Type 2 honored. Forged PTB accepted; next response shrunk. (ICMPv6 Echo + forged PTB)
- DE host (Berlin): Type 2 honored. Forged PTB accepted; next response shrunk. (ICMPv6 Echo + forged PTB)
- DE host (Düsseldorf): Type 2 honored. Forged PTB accepted; next response shrunk. (ICMPv6 Echo + forged PTB)
- NL host (go6lab): Type 2 honored. Forged PTB accepted; next response shrunk. (ICMPv6 Echo + forged PTB)
- ITA host (Karsolink): Type 2 honored. Forged PTB accepted; next response shrunk. (ICMPv6 Echo + forged PTB)
- SLO host (6connect): Type 2 honored. Forged PTB accepted; next response shrunk. (ICMPv6 Echo + forged PTB)
- SLO host (T-2): inconclusive: no Echo Reply to 1300-byte probe. (ICMPv6 Echo + forged PTB)
Why they disagree - reachability mismatch: One vantage couldn't drive a flow at all to this destination (no Echo Reply or no responding TCP port), so the active test had no behavioural change to observe. The other vantage's verdict is the only meaningful one here.
Failure detail - what to grep in your logs
| vantage | our source | your target | method | result | tested (UTC) |
|---|---|---|---|---|---|
| belgrade | 2a09:ab81::91 | 2a07:73c4::1 | icmp6-echo | honored | 2026-09-23T12:05:43Z |
| berlin | 2a06:d1c1:10b::cccc | 2a07:73c4::1 | icmp6-echo | honored | 2026-09-23T12:05:40Z |
| duseldorf | 2a06:d1c1:10d::aaaa | 2a07:73c4::1 | icmp6-echo | honored | 2026-09-23T12:05:39Z |
| go6lab | 2a00:8642:42::75 | 2a07:73c4::1 | icmp6-echo | honored | 2026-09-23T12:06:59Z |
| karsolink | 2a12:d8c0:105a:9001::a154 | 2a07:73c4::1 | icmp6-echo | honored | 2026-09-23T12:05:40Z |
| odin | 2607:fae0:a000::42 | 2a07:73c4::1 | icmp6-echo | honored | 2026-09-23T12:05:39Z |
| t2 | 2a01:261:313:b814:2a0:98ff:fe5b:13e4 | 2a07:73c4::1 | icmp6-echo | no_echo | 2026-09-23T12:05:42Z |
Attempt log (belgrade):
icmp6-echo→ honored (honored by fragmenting its reply into 2 via the IPv6 Fragment Header, rather than resizing)dns-tcp→ no_tcp: connect failed: timed outtls→ no_tcp: TLS connect failedhttp→ no_tcp: tcp/80 not open
Attempt log (berlin):
icmp6-echo→ honored (honored by fragmenting its reply into 2 via the IPv6 Fragment Header, rather than resizing)dns-tcp→ no_tcp: connect failed: timed outtls→ no_tcp: TLS connect failedhttp→ no_tcp: tcp/80 not open
Attempt log (duseldorf):
icmp6-echo→ honored (honored by fragmenting its reply into 2 via the IPv6 Fragment Header, rather than resizing)dns-tcp→ no_tcp: connect failed: timed outtls→ no_tcp: TLS connect failedhttp→ no_tcp: tcp/80 not open
Attempt log (go6lab):
icmp6-echo→ honored (honored by fragmenting its reply into 2 via the IPv6 Fragment Header, rather than resizing)dns-tcp→ no_tcp: connect failed: timed outtls→ no_tcp: TLS connect failedhttp→ no_tcp: tcp/80 not open
Attempt log (karsolink):
icmp6-echo→ honored (honored by fragmenting its reply into 2 via the IPv6 Fragment Header, rather than resizing)dns-tcp→ no_tcp: connect failed: timed outtls→ no_tcp: TLS connect failedhttp→ no_tcp: tcp/80 not open
Attempt log (odin):
icmp6-echo→ honored (honored by fragmenting its reply into 2 via the IPv6 Fragment Header, rather than resizing)dns-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.
Where the path divergence is
Per-vantage probe + verdict (headline):
- belgrade: probe
icmp6-echo→ verdicthonored - berlin: probe
icmp6-echo→ verdicthonored - duseldorf: probe
icmp6-echo→ verdicthonored - go6lab: probe
icmp6-echo→ verdicthonored - karsolink: probe
icmp6-echo→ verdicthonored - odin: probe
icmp6-echo→ verdicthonored - t2: probe
icmp6-echo→ verdictno_echo
Full per-method matrix (all four methods run at each vantage):
| vantage | icmp6-echo | dns-tcp | tls | http |
|---|---|---|---|---|
| belgrade | honored | no_tcp | no_tcp | no_tcp |
| berlin | honored | no_tcp | no_tcp | no_tcp |
| duseldorf | honored | no_tcp | no_tcp | no_tcp |
| go6lab | honored | no_tcp | no_tcp | no_tcp |
| karsolink | honored | no_tcp | no_tcp | no_tcp |
| odin | honored | no_tcp | no_tcp | no_tcp |
| t2 | no_echo | no_tcp | no_tcp | no_tcp |
✓ All vantages agree on method(s): icmp6-echo - the headline-method spread above is dispatcher noise, not a real Type 2 disagreement.
These vantage-level disagreements are rooted somewhere in the forward paths. Joining each per-vantage traceroute against the IP→AS lookup from our global yarrp mesh, the first hop where the paths land in different ASes is the most likely site of the offending filter / unreachable AS / Type 2 drop.
Suspect transit ASes (ranked by how often they appear at the divergence point on the path of the worse-classifying vantage): AS174, AS41327, AS50673.
- From berlin (open/Type-2=honored) the path enters an opaque hop at hop 10; from duseldorf (open/Type-2=honored) the same hop is in AS174. Last common AS: AS174. The disagreement is most likely rooted in one of those two transit ASes.
- From berlin (open/Type-2=honored) the path enters an opaque hop at hop 10; from go6lab (open/Type-2=honored) the same hop is in AS174. Last common AS: AS174. The disagreement is most likely rooted in one of those two transit ASes.
- From berlin (open/Type-2=honored) the path enters an opaque hop at hop 10; from odin (open/Type-2=honored) the same hop is in AS174. Last common AS: AS174. The disagreement is most likely rooted in one of those two transit ASes.
- From duseldorf (open/Type-2=honored) the path enters AS174 at hop 11; from go6lab (open/Type-2=honored) the same hop is in an opaque hop. Last common AS: AS174. The disagreement is most likely rooted in one of those two transit ASes.
- From duseldorf (open/Type-2=honored) the path enters AS174 at hop 10; from karsolink (open/Type-2=honored) the same hop is in an opaque hop. Last common AS: AS174. The disagreement is most likely rooted in one of those two transit ASes.
- From duseldorf (open/Type-2=honored) the path enters AS174 at hop 11; from odin (open/Type-2=honored) the same hop is in an opaque hop. Last common AS: AS174. The disagreement is most likely rooted in one of those two transit ASes.
- From duseldorf (open/Type-2=honored) the path enters AS174 at hop 10; from t2 (all_blocked/Type-2=no_echo) the same hop is in an opaque hop. Last common AS: AS174. The disagreement is most likely rooted in one of those two transit ASes.
- From go6lab (open/Type-2=honored) the path enters AS174 at hop 5; from karsolink (open/Type-2=honored) the same hop is in AS41327. Last common AS: AS174. The disagreement is most likely rooted in one of those two transit ASes.
- From go6lab (open/Type-2=honored) the path enters AS50673 at hop 4; from odin (open/Type-2=honored) the same hop is in AS5603. Last common AS: AS174. The disagreement is most likely rooted in one of those two transit ASes.
- From go6lab (open/Type-2=honored) the path enters AS174 at hop 10; from t2 (all_blocked/Type-2=no_echo) the same hop is in an opaque hop. Last common AS: AS174. The disagreement is most likely rooted in one of those two transit ASes.
- From karsolink (open/Type-2=honored) the path enters AS41327 at hop 5; from odin (open/Type-2=honored) the same hop is in AS3356. Last common AS: AS174. The disagreement is most likely rooted in one of those two transit ASes.
- From odin (open/Type-2=honored) the path enters AS174 at hop 10; from t2 (all_blocked/Type-2=no_echo) the same hop is in an opaque hop. Last common AS: AS174. The disagreement is most likely rooted in one of those two transit ASes.
Diagnosis is path-level, not packet-level: it tells you which transit AS is the prime suspect, not exactly which firewall rule is to blame. Use the tracepath6 output below (when available) for per-hop PMTU evidence on the same path.
✨ Diagnostic interpretation
An operator-targeted diagnostic interpretation can be generated for this AS on demand. The pipeline holds the raw verdicts and the per-hop walk; an AI pass synthesises where to start looking. Click the button below to run it.
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) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 50.3ms
4/4
Echo 1500B (DF) 50.3ms
no
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | 2a09:ab81::1 | 0.2ms | 0%* | AS60733 | PERKE-NET - ZORAN PEROVIC trading as Agencija Perke.NET, RS |
| 2 | sox-pn.sox.rs 2001:7f8:1e:8::3a | 0.4ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 3 | 2001:7f8:1e:8::3d | 0.4ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 4 | 2001:67c:128c::699 | 17.1ms | 0% | - | NA |
| 5 | * | - | 0% | - | |
| 6 | * | - | - | - | |
| 7 | * | - | - | - | |
| 8 | * | - | - | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.014ms pmtu 1500
1: _gateway 0.500ms
1: _gateway 0.688ms
2: sox-pn.sox.rs 0.847ms
3: 2001:7f8:1e:8::3d 0.758ms asymm 2
4: 2001:67c:128c::699 16.962ms
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
Too many hops: pmtu 1500
Resume: pmtu 1500 From DE host (Berlin) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 26.9ms
4/4
Echo 1500B (DF) 26.7ms
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 | 0.3ms | 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 | 10.1ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 4 | ae0-100.cr10.fra02.lwlcom.net 2a00:c380:b200:230::215 | 10.1ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 5 | 2001:978:2:42::154:c | 10.9ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 6 | be5484.ccr41.fra05.atlas.cogentco.com 2001:550:0:1000::8275:101 | 10.8ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 7 | be5516.ccr21.muc03.atlas.cogentco.com 2001:550:0:1000::9a36:3e7a | 16.5ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 8 | port-channel5892.ccr92.mil02.atlas.cogentco.com 2001:550:0:1000::9a36:3ed9 | 24.2ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 9 | be4466.rcr51.b019138-1.mil02.atlas.cogentco.com 2001:550:0:1000::9a36:4bbe | 25.0ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 10 | * | - | 10% | - | |
| 11 | * | - | 0% | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - |
Rate-limited ICMPv6: hop 10 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.014ms pmtu 1500
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.972ms
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.451ms
2: ae0-2453.cr10.ber01.lwlcom.net 0.789ms
3: ae0-150.cr10.fra01.lwlcom.net 10.413ms asymm 7
4: ae0-100.cr10.fra02.lwlcom.net 10.734ms asymm 8
5: 2001:978:2:42::154:c 11.036ms asymm 9
6: be7948.ccr42.fra05.atlas.cogentco.com 11.054ms asymm 10
7: be5516.ccr21.muc03.atlas.cogentco.com 17.333ms asymm 11
8: port-channel5892.ccr92.mil02.atlas.cogentco.com 24.446ms asymm 12
9: be5012.rcr51.b019138-1.mil02.atlas.cogentco.com 25.194ms asymm 13
10: te0-0-2-3.nr14.b019138-1.mil02.atlas.cogentco.com 25.766ms asymm 14
11: no reply
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500 From DE host (Düsseldorf) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 20.9ms
4/4
Echo 1500B (DF) 20.8ms
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 | 0.3ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 2 | eth1-0-12-h5594.edge5-dus1.bb.wiit.network 2001:4ba0:92f4:3::1 | 1.2ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 3 | lag10-h5f01.agr4-dus1.bb.wiit.network 2001:4ba0:ffe9:7c::1 | 2.8ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 4 | lag11.core3-dus1.bb.wiit.network 2001:4ba0:ffe9:115::3 | 0.2ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 5 | lag0-vl1001.core4-dus1.bb.wiit.network 2001:4ba0:ffe9:123::3 | 0.4ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 6 | 2001:978:2:6::20 | 0.7ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 7 | be3690.rcr21.dus01.atlas.cogentco.com 2001:550:0:1000::9a19:1021 | 1.7ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 8 | be2361.ccr42.fra05.atlas.cogentco.com 2001:550:0:1000::9a36:3b5d | 4.9ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 9 | be7944.ccr22.muc03.atlas.cogentco.com 2001:550:0:1000::9a36:4b61 | 10.5ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 10 | port-channel5891.ccr91.mil02.atlas.cogentco.com 2001:550:0:1000::9a36:3db5 | 18.5ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 11 | be5012.rcr51.b019138-1.mil02.atlas.cogentco.com 2001:550:0:1000::9a36:4bda | 19.0ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 12 | te0-0-2-3.nr14.b019138-1.mil02.atlas.cogentco.com 2001:550:0:1000::9a19:c6a | 19.5ms | 10% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 13 | * | - | 0% | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - |
Rate-limited ICMPv6: hop 12 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.019ms pmtu 1500
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.463ms
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.395ms
2: eth1-0-12-h5594.edge5-dus1.bb.wiit.network 1.315ms
3: no reply
4: lag30.core3-dus1.bb.wiit.network 0.503ms
5: lag0-vl1001.core4-dus1.bb.wiit.network 0.655ms
6: 2001:978:2:6::20 0.895ms
7: be3690.rcr21.dus01.atlas.cogentco.com 1.973ms
8: be5490.ccr41.fra05.atlas.cogentco.com 92.148ms asymm 9
9: be5516.ccr21.muc03.atlas.cogentco.com 10.779ms asymm 10
10: port-channel5891.ccr91.mil02.atlas.cogentco.com 18.716ms asymm 11
11: be5012.rcr51.b019138-1.mil02.atlas.cogentco.com 19.279ms asymm 12
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500 From NL host (go6lab) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 30.3ms
4/4
Echo 1500B (DF) 30.7ms
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 | 2.9ms | 0% | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 2 | gw.friends.steffann.nl 2a00:8642:1000:f000::1 | 3.5ms | 0%* | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 3 | 2a00:1ca8:1::194 | 3.8ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 4 | 2a03:3f40::10:41 | 6.4ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 5 | 2001:978:2:40::3:1 | 3.9ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 6 | be3457.ccr41.ams03.atlas.cogentco.com 2001:550:0:1000::8275:109 | 5.2ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 7 | be2950.ccr42.fra05.atlas.cogentco.com 2001:550:0:1000::9a36:482a | 12.0ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 8 | be5516.ccr21.muc03.atlas.cogentco.com 2001:550:0:1000::9a36:3e7a | 17.6ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 9 | port-channel5892.ccr92.mil02.atlas.cogentco.com 2001:550:0:1000::9a36:3ed9 | 26.0ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 10 | be4466.rcr51.b019138-1.mil02.atlas.cogentco.com 2001:550:0:1000::9a36:4bbe | 26.6ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 11 | * | - | 30% | - | |
| 12 | * | - | 0% | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - |
Rate-limited ICMPv6: hop 11 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.049ms pmtu 1500
1: 2a00:8642:42::2 2.100ms
1: 2a00:8642:42::2 2.533ms
2: gw.friends.steffann.nl 6.010ms
3: 2a00:1ca8:1::194 3.961ms
4: 2a03:3f40::10:41 2.729ms
5: 2001:978:2:40::3:1 5.556ms
6: be3458.ccr42.ams03.atlas.cogentco.com 8.614ms
7: be3343.ccr41.fra05.atlas.cogentco.com 13.799ms
8: be5516.ccr21.muc03.atlas.cogentco.com 17.918ms
9: port-channel5892.ccr92.mil02.atlas.cogentco.com 26.999ms
10: be4466.rcr51.b019138-1.mil02.atlas.cogentco.com 30.868ms
11: te0-0-2-3.nr14.b019138-1.mil02.atlas.cogentco.com 28.210ms
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500 From ITA host (Karsolink) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 14.7ms
3/4
Echo 1500B (DF) 14.7ms
no
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | * | - | 0%* | - | |
| 2 | 2a12:d8c0:109f:121::a1 | 0.3ms | 0%* | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 3 | 2a12:d8c0:101f:6::1 | 9.9ms | 20% | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 4 | 2a03:b020:1:51::a | 10.0ms | 0% | AS41327 | FIBERTELECOM-AS - Fiber Telecom S.p.A., IT |
| 5 | 2a03:b020::246 | 10.2ms | 0% | AS41327 | FIBERTELECOM-AS - Fiber Telecom S.p.A., IT |
| 6 | 2001:978:2:2a::e7:1 | 48.3ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 7 | be10063.agr72.mil02.atlas.cogentco.com 2001:550:0:1000::9a19:c5d | 10.6ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 8 | port-channel10061.ccr92.mil02.atlas.cogentco.com 2001:550:0:1000::8275:3091 | 10.1ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 9 | be5012.rcr51.b019138-1.mil02.atlas.cogentco.com 2001:550:0:1000::9a36:4bda | 10.8ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 10 | * | - | - | - | |
| 11 | * | - | 0% | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - |
Rate-limited ICMPv6: hop 3 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.031ms pmtu 1500
1: no reply
2: no reply
3: no reply
4: 2a03:b020:1:51::a 154.953ms
5: 2a03:b020::246 11.022ms
6: 2001:978:2:2a::e7:1 12.290ms
7: be10062.agr71.mil02.atlas.cogentco.com 11.529ms
8: port-channel10061.ccr92.mil02.atlas.cogentco.com 10.816ms
9: be5012.rcr51.b019138-1.mil02.atlas.cogentco.com 11.869ms
10: te0-0-2-3.nr14.b019138-1.mil02.atlas.cogentco.com 11.676ms
11: no reply
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500 From SLO host (6connect) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 19.7ms
4/4
Echo 1500B (DF) 19.7ms
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 | 0.4ms | 0%* | AS8038 | 6CONNECT - 6connect, Inc., US |
| 2 | ccr-to-fw-ccr1-gw-lju.6connect.com 2607:fae0:a000:2::2 | 0.6ms | - | AS8038 | 6CONNECT - 6connect, Inc., US |
| 3 | * | - | 0% | - | |
| 4 | 2a00:ee0:1:10::2 | 1.3ms | 0% | AS5603 | SIOL-NET - Telekom Slovenije, d.d., SI |
| 5 | 2001:1900:5:2:2:0:11c:d49 | 7.4ms | 0% | AS3356 | LEVEL3 - Level 3 Parent, LLC, US |
| 6 | be3101.ccr81.vie01.atlas.cogentco.com 2001:978:3::199 | 34.2ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 7 | be5456.ccr21.muc03.atlas.cogentco.com 2001:550:0:1000::9a36:48a5 | 27.1ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 8 | port-channel5891.ccr91.mil02.atlas.cogentco.com 2001:550:0:1000::9a36:3db5 | 22.6ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 9 | be4466.rcr51.b019138-1.mil02.atlas.cogentco.com 2001:550:0:1000::9a36:4bbe | 23.9ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 10 | te0-0-2-1.nr14.b019138-1.mil02.atlas.cogentco.com 2001:550:0:1000::9a19:c66 | 23.7ms | 20% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 11 | * | - | 0% | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - |
Rate-limited ICMPv6: hop 10 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.025ms pmtu 9000
1: fw1-lju.6connect.com 5.978ms
1: fw1-lju.6connect.com 0.594ms
2: no reply
3: 2a00:ee1:800:9::1 2.443ms
4: 2a00:ee0:1:10::2 1.398ms asymm 3
5: 2a00:ee0:1:15::2 27.702ms pmtu 1500
5: 2001:1900:5:2:2:0:11c:d49 6.557ms asymm 7
6: be3101.ccr81.vie01.atlas.cogentco.com 8.249ms asymm 7
7: be5456.ccr21.muc03.atlas.cogentco.com 28.656ms asymm 8
8: port-channel5891.ccr91.mil02.atlas.cogentco.com 23.307ms asymm 9
9: be4466.rcr51.b019138-1.mil02.atlas.cogentco.com 23.420ms asymm 10
10: te0-0-2-1.nr14.b019138-1.mil02.atlas.cogentco.com 23.961ms asymm 11
11: no reply
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
Too many hops: pmtu 1500From SLO host (T-2) all blocked
filter likely at: past AS174 (COGENT-174) · 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 | * | - | 0%* | - | |
| 2 | 2a01:260:1::225 | 2.1ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 3 | 2a01-260-1-1--9a.core6.t-2.net 2a01:260:1:1::9a | 2.3ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 4 | * | - | 0% | - | |
| 5 | system.0.ear1.Sofia2.level3.net 2001:4c08::4f | 14.5ms | 0% | AS3356 | LEVEL3 - Level 3 Parent, LLC, US |
| 6 | be3356.ccr31.sof02.atlas.cogentco.com 2001:978:3::1cd | 29.4ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 7 | port-channel4827.ccr91.mil02.atlas.cogentco.com 2001:550:0:1000::9a36:3fe5 | 18.3ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 8 | be4466.rcr51.b019138-1.mil02.atlas.cogentco.com 2001:550:0:1000::9a36:4bbe | 19.1ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 9 | be5012.rcr51.b019138-1.mil02.atlas.cogentco.com 2001:550:0:1000::9a36:4bda | 29.4ms | - | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.025ms pmtu 1500
1: no reply
2: 2a01:260:1::225 5.440ms
3: 2a01-260-1-1--9a.core6.t-2.net 2.836ms
4: 2001:1900:5:2:2::3ed5 8.058ms asymm 5
5: lo0.0.edge1.Milan1.level3.net 17.154ms asymm 6
6: 174-3356-mln.sp.lumen.tech 23.872ms
7: port-channel4828.ccr92.mil02.atlas.cogentco.com 18.303ms asymm 8
8: port-channel3281.ccr92.mil02.atlas.cogentco.com 29.796ms
9: be4466.rcr51.b019138-1.mil02.atlas.cogentco.com 30.504ms asymm 8
10: no reply
11: no reply
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500