AS57763 - SELFNET-AS SelfNet Internet Ges.m.b.HPI/PARFC 4890 ✓RPKI ⚠ 5/7ASPA -

AS overview

Test target: 2a01:5740::66 · ns1.selfnet.at · address space: mixed · prefixes announced: 7

prefix(es): 2a01:5741::/32, 2a01:5740::/32, 2001:67c:2560::/48, 2001:67c:2074::/48, 2a06:3cc0::/29, 2001:67c:2318::/48, 2001:67c:2c2c::/48

VIX / AAIX / SAIX / TIROL-IX / ERA-IX peering

Random-IP probe (yarrp) into the AS' prefixes

At least one router inside AS57763's announced prefix replied during the random-target probe. Hop(s): 2a01:5740:ffff:2::142, 2a01:5740:ffff:3::158, 2a01:5740:ffff:5::165, 2a01:5740:ffff:5::166. These are candidate targets for direct testing.

ICMPv6 Type 2 (Packet Too Big) acceptance - active test

Type 2 honored. Forged ICMPv6 PTB (MTU=1280) was accepted by the destination's stack: the next 1500-byte Echo Reply arrived split into 2 fragments via the IPv6 Fragment Header.
method: ICMPv6 Echo + forged PTB, tested 2026-09-22T13:52:49Z

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

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.012ms pmtu 1500
 1:  _gateway                                              0.428ms 
 1:  _gateway                                              0.606ms 
 2:  sox-pn.sox.rs                                         0.470ms 
 3:  2001:7f8:1e:8::3d                                     0.528ms asymm  2 
 4:  ae8-930.RT.IRX.VIE.AT.retn.net                       11.256ms asymm  3 
 5:  vix-ip6-et-0-1-2-0-r60.inx.vie.at.nextlayer.net      28.384ms asymm  3 
 6:  no reply
 7:  border.nxt.selfnet.at                                13.360ms asymm  8 
 8:  unassigned.selfnet.at                                13.459ms 
 9:  unassigned.selfnet.at                                13.416ms asymm  6 
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
     Too many hops: pmtu 1500
     Resume: pmtu 1500 

From DE host (Berlin)   openRFC 4890 ✓

filter likely at: (none) · min PMTU on path: 1500

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.063ms pmtu 1500
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.601ms 
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.665ms 
 2:  ae0-2453.cr10.ber01.lwlcom.net                        1.294ms 
 3:  ae3-90.cr10.ham01.lwlcom.net                          5.432ms 
 4:  ae0-50.cr11.ham01.lwlcom.net                          5.396ms 
 5:  2a00:c380:f000::4b                                    5.806ms asymm  4 
 6:  ae4-2087.dus10.core-backbone.com                     11.966ms asymm  5 
 7:  ae21-2071.fra10.core-backbone.com                    11.145ms asymm  5 
 8:  ae2-2021.fra20.core-backbone.com                     11.298ms asymm  4 
 9:  ae6-2003.nbg20.core-backbone.com                     12.430ms asymm  6 
10:  ae2-2032.muc20.core-backbone.com                     14.920ms asymm  7 
11:  ae1-2028.vie10.core-backbone.com                     20.820ms asymm  8 
12:  2a01:4a0:1338:218::2                                 21.677ms asymm  7 
13:  2a02:1b8::55:2                                       21.519ms asymm  6 
14:  2a02:1b8::54:1                                       22.016ms asymm  5 
15:  2a02:1b8:10:25a::2                                   21.603ms asymm  6 
16:  no reply
17:  no reply
18:  no reply
19:  no reply
20:  no reply
21:  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

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.016ms pmtu 1500
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.464ms 
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.280ms 
 2:  eth1-0-12-h5594.edge5-dus1.bb.wiit.network            1.353ms 
 3:  no reply
 4:  lag30.core3-dus1.bb.wiit.network                      0.490ms 
 5:  lag2.core1-dus-ix.bb.wiit.network                     0.638ms 
 6:  de-cix.r60.inx.fra.de.nextlayer.net                   4.111ms 
 7:  2a02:1b8::43:1                                       20.013ms asymm  6 
 8:  border.nxt.selfnet.at                                16.773ms asymm 13 
 9:  no reply
10:  unassigned.selfnet.at                                20.812ms asymm  8 
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
     Too many hops: pmtu 1500
     Resume: pmtu 1500 

From NL host (go6lab)   openRFC 4890 ✓

filter likely at: (none) · min PMTU on path: 1500

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.036ms pmtu 1500
 1:  2a00:8642:42::2                                       2.319ms 
 1:  2a00:8642:42::2                                       3.013ms 
 2:  no reply
 3:  2a00:1ca8:1::194                                      5.116ms 
 4:  2a03:3f40::10:41                                      3.499ms 
 5:  2001:b28:3ff::136:249                                21.113ms asymm  8 
 6:  2a02:1b8::55:2                                       24.785ms asymm  8 
 7:  2a02:1b8::54:1                                       24.560ms 
 8:  2a02:1b8:10:25a::2                                   22.357ms 
 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
     Too many hops: pmtu 1500
     Resume: pmtu 1500 

From ITA host (Karsolink)   openRFC 4890 ✓

filter likely at: (none) · min PMTU on path: 1500

Path (traceroute + mtr + PTR)

Rate-limited ICMPv6: hop 3 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.070ms pmtu 1500
 1:  no reply
 2:  2a12:d8c0:109f:121::a1                                1.070ms 
 3:  2a12:d8c0:101f:6::1                                  10.521ms 
 4:  no reply
 5:  be47.core1.mil2.he.net                               11.726ms 
 6:  be1.core1.zrh2.he.net                                16.841ms 
 7:  no reply
 8:  be1.core3.zrh3.he.net                                17.275ms 
 9:  no reply
10:  no reply
11:  border.nxt.selfnet.at                                18.475ms asymm 12 
12:  unassigned.selfnet.at                                18.301ms 
13:  unassigned.selfnet.at                                19.246ms asymm  9 
14:  no reply
15:  no reply
16:  no reply
17:  no reply
18:  no reply
19:  no reply
20:  no reply
21:  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

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.021ms pmtu 9000
 1:  fw1-lju.6connect.com                                  0.875ms 
 1:  fw1-lju.6connect.com                                  0.653ms 
 2:  no reply
 3:  no reply
 4:  2a00:ee0:1:15::2                                      1.635ms asymm  3 
 5:  2a00:ee0:1:10::2                                      1.552ms pmtu 1500
 5:  decix.edge01.fra.nessus.at                           14.667ms asymm  7 
 6:  2a02:1b8::43:1                                       14.681ms 
 7:  2a02:1b8:10:25a::2                                   14.722ms 
 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
     Too many hops: pmtu 1500

From SLO host (T-2)   openRFC 4890 ✓

filter likely at: (none) · min PMTU on path: 1500

Path (traceroute + mtr + PTR)

Rate-limited ICMPv6: hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.027ms pmtu 1500
 1:  2a01:261:313:b814::1                                  1.390ms 
 1:  no reply
 2:  2a01:260:1::225                                      20.379ms 
 3:  2a01-260-1-1--9a.core6.t-2.net                        2.883ms 
 4:  2a01-260-1-1--38.core6.t-2.net                        2.933ms asymm  3 
 5:  100ge0-0-0-31.core1.vie1.he.net                      13.267ms 
 6:  2001:7f8:30:0:2:1:4:7692                             10.580ms asymm  5 
 7:  2001:7f8:30:0:1:1:4:7692                             42.351ms asymm  6 
 8:  2a02:1b8:10:25a::2                                    9.857ms asymm  7 
 9:  2a02:1b8:10:25a::2                                   10.106ms asymm  7 
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
     Too many hops: pmtu 1500
     Resume: pmtu 1500