AS overview
Test target: 2a03:5fe0:2::55 · monitor.providus.rs · address space: unknown · prefixes announced: 3
prefix(es): 2a03:5fe1::/32, 2a03:5fe2::/32, 2a03:5fe0::/32
Targets & per-vantage-point probe results (5 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 | ||
2a03:5fe0:2::46support.providus.rs | drv | ✗ | ✗ | ? | ? | - | ✗ | ✗ | ? | ? | - | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ |
2a03:5fe0:2::51ns.providus.rs | drv | ✗ | ✗ | ? | ? | - | ✗ | ✗ | ? | ? | - | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ |
2a03:5fe0:2::52providus.rs | drv | ✗ | ✗ | ? | ? | - | ✗ | ✗ | ? | ? | - | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ |
2a03:5fe0:2::55monitor.providus.rs | drv | ✗ | ✗ | ? | ? | - | ✗ | ✗ | ? | ? | - | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ |
2a03:5fe0:2::56mx3.providus.rs | drv | ✗ | ✗ | ? | ? | - | ✗ | ✗ | ? | ? | - | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ |
SOX peering
Not an SOX member, but our traceroute path crosses the SOX LAN from SRB host (SOX, Belgrade) - reached via an SOX-resident transit operator.
RPKI & ASPA
3 of 3 prefix(es) covered by a valid ROA.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a03:5fe0::/32 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS43191 /32 maxLen 32 (ripe) |
2a03:5fe1::/32 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS43191 /32 maxLen 32 (ripe) |
2a03:5fe2::/32 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS43191 /32 maxLen 32 (ripe) |
Random-IP probe (yarrp) into the AS' prefixes
We probed 70 arbitrary IPv6 address(es) inside AS43191's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2001:470:0:33f::1 at hop 8 - that router answers ICMPv6 Echo. This is not in AS43191's announced prefix; operationally it's the AS-edge / peering interface (often on a SOX 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): inconclusive: no Echo Reply to 1300-byte probe. (ICMPv6 Echo + forged PTB)
- DE host (Berlin): inconclusive: no Echo Reply to 1300-byte probe. (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): Type 2 honored. Forged PTB accepted; next response shrunk. (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 | 2a03:5fe0:2::55 | icmp6-echo | no_echo | 2026-09-23T11:08:49Z |
| berlin | 2a06:d1c1:10b::cccc | 2a03:5fe0:2::55 | icmp6-echo | no_echo | 2026-09-23T11:08:50Z |
| duseldorf | 2a06:d1c1:10d::aaaa | 2a03:5fe0:2::55 | icmp6-echo | honored | 2026-09-23T11:08:48Z |
| go6lab | 2a00:8642:42::75 | 2a03:5fe0:2::55 | icmp6-echo | honored | 2026-09-23T11:08:54Z |
| karsolink | 2a12:d8c0:105a:9001::a154 | 2a03:5fe0:2::55 | icmp6-echo | honored | 2026-09-23T11:08:49Z |
| odin | 2607:fae0:a000::42 | 2a03:5fe0:2::55 | icmp6-echo | honored | 2026-09-23T11:08:48Z |
| t2 | 2a01:261:313:b814:2a0:98ff:fe5b:13e4 | 2a03:5fe0:2::55 | icmp6-echo | honored | 2026-09-23T11:08:48Z |
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→ honored (honored by fragmenting its reply into 2 via the IPv6 Fragment Header, rather than resizing)dns-tcp→ no_tcp: connect failed: [Errno 111] Connection refusedtls→ not_honored (reply shrank 4284→5807 B)http→ inconclusive (reply 536 B before PTB): natural max segment 536B already <= 1220B; nothing to shrink
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→ inconclusive (reply 274 B before PTB): largest TLS segment 274B too small to detect shrinkhttp→ inconclusive: no TCP data from dest in baseline
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: [Errno 111] Connection refusedtls→ not_honored (reply shrank 5807→5807 B)http→ inconclusive (reply 536 B before PTB): natural max segment 536B already <= 1220B; nothing to shrink
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: [Errno 111] Connection refusedtls→ not_honored (reply shrank 4284→5807 B)http→ inconclusive (reply 536 B before PTB): natural max segment 536B already <= 1220B; nothing to shrink
Attempt log (t2):
icmp6-echo→ honored (honored by fragmenting its reply into 2 via the IPv6 Fragment Header, rather than resizing)dns-tcp→ no_tcp: connect failed: [Errno 111] Connection refusedtls→ partial (reply shrank 2856→2416 B)http→ inconclusive (reply 536 B before PTB): natural max segment 536B already <= 1220B; nothing to shrink
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→ verdictno_echo - berlin: probe
icmp6-echo→ verdictno_echo - duseldorf: probe
icmp6-echo→ verdicthonored - go6lab: probe
icmp6-echo→ verdicthonored - karsolink: probe
icmp6-echo→ verdicthonored - odin: probe
icmp6-echo→ verdicthonored - t2: probe
icmp6-echo→ verdicthonored
Full per-method matrix (all four methods run at each vantage):
| vantage | icmp6-echo | dns-tcp | tls | http |
|---|---|---|---|---|
| belgrade | no_echo | no_tcp | no_tcp | no_tcp |
| berlin | no_echo | no_tcp | no_tcp | no_tcp |
| duseldorf | honored | no_tcp | not_honored | inconclusive |
| go6lab | honored | no_tcp | inconclusive | inconclusive |
| karsolink | honored | no_tcp | not_honored | inconclusive |
| odin | honored | no_tcp | not_honored | inconclusive |
| t2 | honored | no_tcp | partial | inconclusive |
✓ 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): AS8400, AS43191, AS6939.
- From belgrade (all_blocked/Type-2=no_echo) the path enters an opaque hop at hop 6; from berlin (all_blocked/Type-2=no_echo) the same hop is in AS8400. Last common AS: AS8400. The disagreement is most likely rooted in one of those two transit ASes.
- From belgrade (all_blocked/Type-2=no_echo) the path enters AS8400 at hop 3; from odin (open/Type-2=honored) the same hop is in AS56635. Last common AS: no shared transit. The disagreement is most likely rooted in one of those two transit ASes.
- From berlin (all_blocked/Type-2=no_echo) the path enters AS8400 at hop 6; from duseldorf (open/Type-2=honored) the same hop is in AS6939. Last common AS: no shared transit. The disagreement is most likely rooted in one of those two transit ASes.
- From berlin (all_blocked/Type-2=no_echo) the path enters AS8400 at hop 6; from go6lab (open/Type-2=honored) the same hop is in AS6939. Last common AS: no shared transit. The disagreement is most likely rooted in one of those two transit ASes.
- From berlin (all_blocked/Type-2=no_echo) the path enters AS8400 at hop 6; from karsolink (open/Type-2=honored) the same hop is in AS6939. Last common AS: no shared transit. The disagreement is most likely rooted in one of those two transit ASes.
- From berlin (all_blocked/Type-2=no_echo) the path enters AS8400 at hop 6; from odin (open/Type-2=honored) the same hop is in AS6939. Last common AS: no shared transit. The disagreement is most likely rooted in one of those two transit ASes.
- From berlin (all_blocked/Type-2=no_echo) the path enters AS8400 at hop 7; from t2 (open/Type-2=honored) the same hop is in AS6939. Last common AS: no shared transit. The disagreement is most likely rooted in one of those two transit ASes.
- From duseldorf (open/Type-2=honored) the path enters AS43191 at hop 9; from go6lab (open/Type-2=honored) the same hop is in AS6939. Last common AS: AS43191. The disagreement is most likely rooted in one of those two transit ASes.
- From go6lab (open/Type-2=honored) the path enters AS6939 at hop 9; from karsolink (open/Type-2=honored) the same hop is in AS43191. Last common AS: AS43191. The disagreement is most likely rooted in one of those two transit ASes.
- From go6lab (open/Type-2=honored) the path enters AS6939 at hop 9; from odin (open/Type-2=honored) the same hop is in AS43191. Last common AS: AS43191. The disagreement is most likely rooted in one of those two transit ASes.
- From go6lab (open/Type-2=honored) the path enters AS6939 at hop 9; from t2 (open/Type-2=honored) the same hop is in AS43191. Last common AS: AS43191. 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) all blocked
filter likely at: past AS8400 (TELEKOM-AS) · 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 | 0.4ms | 0%* | AS60733 | PERKE-NET - ZORAN PEROVIC trading as Agencija Perke.NET, RS |
| 2 | telekom-srbija.sox.rs @SOX 2001:7f8:1e::38 | 0.6ms | 0% | AS13004 | Serbian Open eXchange |
| 3 | 2a00:e90::212:200:6:60 | 2.5ms | 0% | AS8400 | TELEKOM-AS - TELEKOM SRBIJA a.d., RS |
| 4 | * | - | - | - | |
| 5 | * | - | - | - | |
| 6 | * | - | - | - | |
| 7 | * | - | - | - | |
| 8 | * | - | - | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.024ms pmtu 1500
1: _gateway 1.074ms
1: _gateway 0.328ms
2: telekom-srbija.sox.rs 0.553ms
3: 2a00:e90::212:200:6:60 1.122ms
4: no reply
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) all blocked
filter likely at: past AS8400 (TELEKOM-AS) · 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 | 0.3ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 2 | ae0-2453.cr10.ber01.lwlcom.net 2a06:d1c0::dead:beef:1c02 | 0.9ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 3 | ae0-40.cr10.muc02.lwlcom.net 2a00:c380:b200:230::178 | 11.5ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 4 | ae0-10.cr10.muc01.lwlcom.net 2a00:c380:b200:230::177 | 11.4ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 5 | 2001:7f8:30:0:2:1:0:8400 | 17.6ms | 0% | - | NA |
| 6 | 2a00:e90::212:200:5:7 | 26.9ms | 0% | AS8400 | TELEKOM-AS - TELEKOM SRBIJA a.d., RS |
| 7 | 2a00:e90::212:200:6:8 | 26.4ms | 0% | AS8400 | TELEKOM-AS - TELEKOM SRBIJA a.d., RS |
| 8 | 2a00:e90::212:200:6:60 | 27.0ms | 0% | AS8400 | TELEKOM-AS - TELEKOM SRBIJA a.d., RS |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.045ms pmtu 1500
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.539ms
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.335ms
2: ae0-2453.cr10.ber01.lwlcom.net 0.921ms
3: ae0-40.cr10.muc02.lwlcom.net 11.764ms
4: ae0-10.cr10.muc01.lwlcom.net 11.524ms
5: 2001:7f8:30:0:2:1:0:8400 17.768ms
6: 2a00:e90::212:200:5:7 26.699ms asymm 11
7: 2a00:e90::212:200:6:8 26.399ms asymm 10
8: 2a00:e90::212:200:6:60 26.754ms
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 (Düsseldorf) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 23.4ms
4/4
Echo 1500B (DF) 23.5ms
yes
Type 1 dest-unreach
443,80
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 | ipv6.decix-dusseldorf.core1.dus1.he.net 2001:7f8:9e::1b1b:0:1 | 5.2ms | 0% | - | NA |
| 3 | 100ge0-0-0-18.core4.fra1.he.net 2001:470:0:52e::1 | 13.2ms | 30% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 4 | be8.core1.prg1.he.net 2001:470:e:1e::2 | 20.4ms | 30% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | be3.core1.vie1.he.net 2001:470:e:a7::2 | 18.6ms | 20% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | e0-35.core2.bts1.he.net 2001:470:0:412::2 | 17.0ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | e0-36.core2.beg1.he.net 2001:470:0:33f::1 | 24.2ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 8 | providus-d-o-o.10gigabitethernet1-1-4.switch1.beg1.he.net 2001:470:1:61d::2 | 23.5ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 9 | sw-thq-ex--mx204 2a03:5fe0::2 | 24.2ms | 0% | AS43191 | providus-as - Providus d.o.o., RS |
| 10 | srv68-55.itplatforma.com 2a03:5fe0:2::55 | 23.4ms | 0% | AS43191 | providus-as - Providus d.o.o., RS |
Rate-limited ICMPv6: hop 3, hop 4, hop 5 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.025ms pmtu 1500
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.529ms
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.229ms
2: ipv6.decix-dusseldorf.core1.dus1.he.net 6.802ms asymm 3
3: 100ge0-0-0-18.core4.fra1.he.net 15.203ms asymm 4
4: be8.core1.prg1.he.net 20.115ms asymm 5
5: be3.core1.vie1.he.net 18.960ms asymm 4
6: e0-35.core2.bts1.he.net 17.389ms asymm 5
7: e0-36.core2.beg1.he.net 24.207ms asymm 6
8: providus-d-o-o.10gigabitethernet1-1-4.switch1.beg1.he.net 23.737ms asymm 7
9: sw-thq-ex--mx204 25.040ms asymm 8
10: srv68-55.itplatforma.com 23.718ms reached
Resume: pmtu 1500 hops 10 back 9 From NL host (go6lab) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 30.5ms
4/4
Echo 1500B (DF) 31.2ms
yes
Type 1 dest-unreach
443,80
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | 2a00:8642:42::2 | 0.0ms | 0% | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 2 | gw.friends.steffann.nl 2a00:8642:1000:f000::1 | 3.7ms | 0%* | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 3 | speed-ix.he.net 2001:7f8:b7::a500:6939:1 | 10.3ms | 0% | - | NA |
| 4 | be2.core4.fra1.he.net 2001:470:e:38::2 | 13.1ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | be8.core1.prg1.he.net 2001:470:e:1e::2 | 20.4ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | be3.core1.vie1.he.net 2001:470:e:a7::2 | 22.0ms | 10% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | e0-35.core2.bts1.he.net 2001:470:0:412::2 | 24.5ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 8 | e0-36.core2.beg1.he.net 2001:470:0:33f::1 | 32.1ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 9 | providus-d-o-o.10gigabitethernet1-1-4.switch1.beg1.he.net 2001:470:1:61d::2 | 32.2ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 10 | sw-thq-ex--mx204 2a03:5fe0::2 | 28.5ms | 0% | AS43191 | providus-as - Providus d.o.o., RS |
| 11 | srv68-55.itplatforma.com 2a03:5fe0:2::55 | 30.4ms | 0% | AS43191 | providus-as - Providus d.o.o., RS |
Rate-limited ICMPv6: hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.056ms pmtu 1500
1: 2a00:8642:42::2 1.232ms
1: 2a00:8642:42::2 2.073ms
2: gw.friends.steffann.nl 3.101ms
3: speed-ix.he.net 8.028ms
4: be2.core4.fra1.he.net 13.153ms
5: be8.core1.prg1.he.net 17.713ms
6: be3.core1.vie1.he.net 21.926ms
7: e0-35.core2.bts1.he.net 21.551ms
8: e0-36.core2.beg1.he.net 29.381ms
9: providus-d-o-o.10gigabitethernet1-1-4.switch1.beg1.he.net 30.309ms
10: sw-thq-ex--mx204 28.310ms
11: srv68-55.itplatforma.com 28.574ms reached
Resume: pmtu 1500 hops 11 back 11 From ITA host (Karsolink) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 28.6ms
3/4
Echo 1500B (DF) 28.2ms
yes
Type 1 dest-unreach
443,80
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | * | - | 0%* | - | |
| 2 | * | - | 0%* | - | |
| 3 | 2a12:d8c0:101f:6::1 | 9.7ms | - | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 4 | * | - | - | - | |
| 5 | 100ge0-0-0-20.core1.vie1.he.net 2001:470:0:414::1 | 22.1ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | e0-35.core2.bts1.he.net 2001:470:0:412::2 | 21.9ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | e0-36.core2.beg1.he.net 2001:470:0:33f::1 | 28.7ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 8 | providus-d-o-o.10gigabitethernet1-1-4.switch1.beg1.he.net 2001:470:1:61d::2 | 28.4ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 9 | sw-thq-ex--mx204 2a03:5fe0::2 | 29.2ms | 0% | AS43191 | providus-as - Providus d.o.o., RS |
| 10 | srv68-55.itplatforma.com 2a03:5fe0:2::55 | 28.4ms | 0% | AS43191 | providus-as - Providus d.o.o., RS |
tracepath -6
1?: [LOCALHOST] 0.044ms pmtu 1500
1: karsolink-01.net.karsolink.com 0.565ms
2: 2a12:d8c0:109f:121::a1 0.574ms
3: 2a12:d8c0:101f:103::1 8.565ms
4: no reply
5: 100ge0-0-0-20.core1.vie1.he.net 22.195ms
6: e0-35.core2.bts1.he.net 21.733ms
7: e0-36.core2.beg1.he.net 29.971ms
8: providus-d-o-o.10gigabitethernet1-1-4.switch1.beg1.he.net 29.710ms
9: sw-thq-ex--mx204 30.025ms
10: srv68-55.itplatforma.com 29.850ms reached
Resume: pmtu 1500 hops 10 back 10 From SLO host (6connect) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 14.3ms
4/4
Echo 1500B (DF) 14.3ms
yes
Type 1 dest-unreach
443,80
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | fw1-lju.6connect.com 2607:fae0:a000::2 | 0.6ms | 0%* | AS8038 | 6CONNECT - 6connect, Inc., US |
| 2 | ccr-to-fw-ccr1-gw-lju.6connect.com 2607:fae0:a000:2::2 | 0.6ms | 0%* | AS8038 | 6CONNECT - 6connect, Inc., US |
| 3 | 2a03:a100:0:201:1::1 | 0.6ms | 0% | AS56635 | XENYA - XENYA inzeniring, proizvodnja in trgovina, d.o.o. Ljubljana, SI |
| 4 | e0-1.core1.lju1.he.net 2001:470:1:5be::1 | 1.8ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | 100ge0-0-0-5.core1.vie1.he.net 2001:470:0:578::1 | 8.4ms | 10% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | e0-35.core2.bts1.he.net 2001:470:0:412::2 | 7.6ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | e0-36.core2.beg1.he.net 2001:470:0:33f::1 | 14.5ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 8 | providus-d-o-o.10gigabitethernet1-1-4.switch1.beg1.he.net 2001:470:1:61d::2 | 14.3ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 9 | sw-thq-ex--mx204 2a03:5fe0::2 | 14.7ms | 0% | AS43191 | providus-as - Providus d.o.o., RS |
| 10 | srv68-55.itplatforma.com 2a03:5fe0:2::55 | 14.2ms | 0% | AS43191 | providus-as - Providus d.o.o., RS |
Rate-limited ICMPv6: hop 5 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.032ms pmtu 9000
1: fw1-lju.6connect.com 0.570ms
1: fw1-lju.6connect.com 0.653ms
2: no reply
3: 2a03:a100:0:201:1::1 1.082ms
4: 2a03:a100:0:201:1::1 0.732ms pmtu 1500
4: e0-1.core1.lju1.he.net 2.047ms
5: 100ge0-0-0-5.core1.vie1.he.net 8.099ms
6: e0-35.core2.bts1.he.net 7.910ms
7: e0-36.core2.beg1.he.net 14.960ms
8: providus-d-o-o.10gigabitethernet1-1-4.switch1.beg1.he.net 14.763ms
9: sw-thq-ex--mx204 16.056ms
10: srv68-55.itplatforma.com 14.569ms reached
Resume: pmtu 1500 hops 10 back 10 From SLO host (T-2) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 17.3ms
4/4
Echo 1500B (DF) 17.6ms
yes
Type 1 dest-unreach
443,80
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | * | - | 0%* | - | |
| 2 | 2a01:260:1::225 | 2.6ms | 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 | 2a01-260-1-1--38.core6.t-2.net 2a01:260:1:1::38 | 2.1ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 5 | 100ge0-0-0-31.core1.vie1.he.net 2001:470:0:4a8::1 | 12.6ms | - | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | 100ge0-0-0-31.core1.vie1.he.net 2001:470:0:4a8::1 | 12.4ms | 10% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | e0-36.core2.beg1.he.net 2001:470:0:33f::1 | 18.7ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 8 | e0-36.core2.beg1.he.net 2001:470:0:33f::1 | 18.3ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 9 | sw-thq-ex--mx204 2a03:5fe0::2 | 18.4ms | 0% | AS43191 | providus-as - Providus d.o.o., RS |
| 10 | srv68-55.itplatforma.com 2a03:5fe0:2::55 | 17.2ms | 0% | AS43191 | providus-as - Providus d.o.o., RS |
Rate-limited ICMPv6: hop 6 (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 4.611ms
3: 2a01-260-1-1--9a.core6.t-2.net 1.824ms
4: 2a01-260-1-1--38.core6.t-2.net 2.560ms asymm 3
5: 100ge0-0-0-31.core1.vie1.he.net 10.986ms
6: 100ge0-0-0-31.core1.vie1.he.net 12.718ms asymm 5
7: e0-36.core2.beg1.he.net 19.013ms
8: providus-d-o-o.10gigabitethernet1-1-4.switch1.beg1.he.net 18.601ms
9: providus-d-o-o.10gigabitethernet1-1-4.switch1.beg1.he.net 18.079ms asymm 8
10: sw-thq-ex--mx204 18.721ms asymm 9
11: srv68-55.itplatforma.com 18.675ms reached
Resume: pmtu 1500 hops 11 back 10