Tor Relays :: COtto

View Relay "COtto"

Fingerprint: `4E8BF739B5E7835776EDD72CF9CAA402ACE00055` | Operator: ftp.halifax.rwth-aachen.de (9 relays) ✓ Validated | Family: 9 relays | 0x8D41788E90924014 Carsten Otto... | AS24940 | Germany | Linux

Health Status

Consensus: In Consensus (8/8 Directory Auths)
Flags: Running, Valid, V2Dir, Fast, Stable, HSDir, Guard (7)
BW Verified: 5/5 BW Auths Measured 70 Kbit/s Median
Stability: Not Overloaded | UP 3w 5d 23h ago | UP 100% (1M)

Reachability: IPv4: 8/9 | v6: 7/8 (Directory Auths)
First Seen: 2w 1d 3h ago
BW Weight: 0.01% of Network | 68 Mbit/s Observed By Relay
Version: 0.4.9.6 Recommended

Issues Detected:

High consensus weight deviation : Large variation in Consensus Weight values across authorities (see 'Cons Wt' column in Per-Authority Details below)
Suggestion: Consensus weight measurements vary significantly between authorities. This can affect traffic distribution. Ensure stable network connection and consistent bandwidth availability.

Notes:

Partial IPv4 reachability: 8/9 authorities can reach this relay

Connectivity and Location

Addresses

OR Address: c-otto.de
157.90.112.145:9001
[2a01:4f8:c2c:e8a0::1]:9001

Reachability (Directory Authorities)

IPv4: 8/9
IPv6: 7/8 (1 don't test)

Location

Country: Germany
Interactive Map: View in RouteFluxMap

Autonomous System

AS Number: AS24940
AS Name: Hetzner Online GmbH (BGP.tools)
AS Rarity: Common (score: 0/5, 7.18% consensus weight, 264 operators)

Flags and Eligibility

Current Flags (7): Running, Valid, V2Dir, Fast, Stable, HSDir, Guard

Eligibility Flag Vote Details

Flag	Metric	Status	Relay Value	Threshold Required
Running	IPv4 Reachability	Meets (8/8 DA)	8/8 authorities reached relay	≥5/8 DA ORPort reachable
Running	IPv6 Reachability	Meets (7/7 DA)	7/7 tested authorities reached relay	≥4/7 tested (majority) (≥4/7 DA)
Valid	Descriptor	Meets (8/8 DA)	8/8 authorities assigned Valid	Not blacklisted + valid descriptor (≥5/8 DA)
V2Dir	DirPort Available	Meets (8/8 DA)	Tunnelled: Yes (no DirPort) (R)	Tunnelled directory via ORPort or DirPort (≥5/8 DA)
Fast	Speed	Meets (8/8 DA)	68.7 Mbit/s (R)	≥800.0 Kbit/s (Tor spec minimum) OR top 7/8 (≥5/8 DA) [Stricter] moria1: ≥8.4 Mbit/s
Stable	MTBF	Meets (8/8 DA)	Median: 388.9d (6/8 DA above threshold) Min/Max: 42.0d / 726.4d (8/8 DA, Voting / Total Eligible)	≥19.1d - 61.1d (varies) (≥5/8 DA)
Stable	Uptime	Meets (8/8 DA)	27.0d (R)	≥12.8d - 12.8d (varies) (≥5/8 DA)
HSDir	Prereq: Fast	Meets (8/8 DA)	8/8 DA assigned Fast	≥800.0 Kbit/s (Tor spec minimum) OR top 7/8 (≥5/8 DA) [Stricter] moria1: ≥8.4 Mbit/s
	Prereq: Stable	Meets (8/8 DA)	8/8 DA assigned Stable	≥19.1d - 61.1d (varies) (≥5/8 DA)
	Prereq: V2Dir	Meets (8/8 DA)	8/8 DA assigned V2Dir	Tunnelled directory via ORPort or DirPort (≥5/8 DA)
	WFU	Meets (8/8 DA)	Majority: 100.0% (6/8 DA) Min/Med/Max: 99.3% / 100.0% / 100.0% (8/8 DA, Voting / Total Eligible)	≥98.0% (≥5/8 DA)
	Time Known	Meets (8/8 DA)	Median: 236.4d (8/8 DA above threshold) Min/Max: 9.9d / 726.4d (8/8 DA, Voting / Total Eligible)	≥1.0d (most) (≥5/8 DA) [Stricter] moria1: ≥9.8d
Guard	Prereq: Fast	Meets (8/8 DA)	8/8 DA assigned Fast	≥800.0 Kbit/s (Tor spec minimum) OR top 7/8 (≥5/8 DA) [Stricter] moria1: ≥8.4 Mbit/s
	Prereq: Stable	Meets (8/8 DA)	8/8 DA assigned Stable	≥19.1d - 61.1d (varies) (≥5/8 DA)
	Prereq: V2Dir	Meets (8/8 DA)	8/8 DA assigned V2Dir	Tunnelled directory via ORPort or DirPort (≥5/8 DA)
	WFU	Meets (8/8 DA)	Majority: 100.0% (6/8 DA) Min/Med/Max: 99.3% / 100.0% / 100.0% (8/8 DA, Voting / Total Eligible)	≥98% (≥5/8 DA)
	Time Known	Meets (8/8 DA)	Median: 236.4d (8/8 DA above threshold) Min/Max: 9.9d / 726.4d (8/8 DA, Voting / Total Eligible)	≥8 days (≥5/8 DA)
	Bandwidth	Meets (8/8 DA)	68.7 Mbit/s (R)	≥16.0 Mbit/s (Tor spec minimum) OR ≥80.0 Mbit/s-312.0 Mbit/s (≥5/8 DA)
Exit	Exit Policy	Below (0/8 DA)	Port 80: No \| Port 443: No (R)	Allows ≥1 /8 on ports 80 AND 443 (≥5/8 DA)

(DA) = Dir. Auth. Measured | (R) = Relay Reported
Data from Tor CollecTor (authority votes, fetched 2026-04-22 02:15:08).

Bandwidth Metrics

Capacity (Relay Reported)

Observed Bandwidth: 68.74 Mbit/s
Advertised Bandwidth: 65.54 Mbit/s
Rate Limit: 65.54 Mbit/s
Burst Limit: 131.07 Mbit/s
Total Data: 1.4 PB (5 years)
1mo: 21 TB | 6mo: 111 TB | 1y: 250 TB | 5y: 1.4 PB

Measurement (Directory Authority Verified)

Source: CollecTor — fetched 2026-04-22 02:15:08

Measured By: 5/5 Bandwidth Authorities
Median Measurement: 70.0 Kbit/s
Min / Max: 65.5 Kbit/s / 104.0 Kbit/s
Deviation: 38.5 Kbit/s [Warning] High variation

Network Participation: Consensus Weight: 0.0051% of network (49th pctl) | Guard: 0.0089% (60th pctl) | Middle: 0.0063% (61th pctl) | Exit: N/A

Uptime and Stability

Uptime Metrics

Current Status: UP 3w 5d 23h ago
Overall Uptime (1M/6M/1Y/5Y): 100.0%/100.0%/100.0%/99.8%
Flag Uptime (1M/6M/1Y/5Y): Matches Overall Uptime (100.0%/100.0%/100.0%/99.8%)
Hibernating: No

Timestamps

First Seen: 2w 1d 3h ago (2026-04-06 23:00:00)
Last Seen: 2h 17m 26s ago (2026-04-22 00:00:00)
Last Restarted: 3w 5d 23h ago (2026-03-26 03:04:43)
Last Changed Address: 2026-04-06 23:00:00

Overload Status: Not Overloaded — No overload conditions reported.

Operator and Family

Operator Identity

Source: AROI Validation API — 2026-04-21 19:00 UTC

AROI Domain (?): ftp.halifax.rwth-aachen.de
Operator Validation: Validated (9/9 relays)
This Relay: Validated (uri-rsa)
Contact: 0x8D41788E90924014 Carsten Otto <tor@c-otto.de> url:ftp.halifax.rwth-aachen.de proof:uri-rsa ciissversion:2

Family Configuration

Family Support: MyFamily Only (9) — Legacy only. Consider migrating to Happy Families. | View Full Family (9)

Happy Families (family-cert)

Effective Members: 0: none

MyFamily (legacy declarations)

Effective Members: 9

008EAE223B110C8EDEE20D06FB0DD4C43E3E0142
1815E96EDB9444E9CD0D11FB9BB695B687C21E82
27E1B97D9491013EF48479D4F47002F3358E0D92
2F3B9DFFDF23DAC9CCC8E223EAB6423535DDC21E
4E8BF739B5E7835776EDD72CF9CAA402ACE00055 (this relay)
63F7DC3102C95E010F83B2041A5938909E4ABAF2
A86B8708BAAC8A1FE66F0FE9270D23A364A1601B
ACB898B28ACABBD78F23AF2FB06FC864A4111646
DA78144C70B15AE3EB04DE340DC8FADB80F1F495

Alleged Members: 0

none

Indirect Members: 0

none

Software and Version

Platform: Linux — Tor 0.4.9.6 on Linux
Version: 0.4.9.6 — Recommended
Version Status: Recommended

Exit Health & Policy

DNS Health

Not an exit relay — DNS health testing does not apply.

IPv4 Exit Policy Summary

reject: 
  1-65535

Full Exit Policy

reject *:*

Last fetch was at Wed, 22 Apr 2026 02:17:26 GMT.

Consensus Evaluation

Data from Tor CollecTor (authority votes, fetched 2026-04-22 02:15:08).

Per-Authority Details

Each cell shows: your measured value | authority threshold. Green = meets, red = below. Flags: green = all authorities agree, yellow = partial.

Authority	Running	Valid	Exit	MiddleOnly	BW Scan (Authority)	v4	v6	Flags	Fast (Relay\|T)	Guard BW (Relay\|Threshold)	Guard WFU (M\|T)	Guard TK (M\|T)	Stable MTBF (M\|T)	Stable Uptime (Relay\|T)	HSDir WFU (M\|T)	HSDir TK (M\|T)	Desc Published	Cons Wt (Authority)
bastet (US)	No	—	—	—	N	No	—	—	—	—	—	—	—	—	—	—	—	—
dannenberg (DE)	Yes	Yes	No	—	N	Yes	Yes	Running, Valid, V2Dir, Fast, Stable, HSDir, Guard	68.7 Mbit/s \| 816.0 Kbit/s	68.7 Mbit/s \| 80.0 Mbit/s OR 16.0 Mbit/s	100.0% \| 98%	42.6d \| 8d	42.0d \| 39.5d	27.0d \| 12.8d	100.0% \| 98.0%	42.6d \| 1.0d	2026-04-21 18:05:17	65.5 Kbit/s
dizum (NL)	Yes	Yes	No	—	N	Yes	Yes	Running, Valid, V2Dir, Fast, Stable, HSDir, Guard	68.7 Mbit/s \| 816.0 Kbit/s	68.7 Mbit/s \| 80.0 Mbit/s OR 16.0 Mbit/s	100.0% \| 98%	128.1d \| 8d	128.1d \| 39.9d	27.0d \| 12.8d	100.0% \| 98.0%	128.1d \| 1.0d	2026-04-21 18:05:17	65.5 Kbit/s
faravahar (US)	Yes	Yes	No	—	N	Yes	Yes	Running, Valid, V2Dir, Fast, Stable, HSDir, Guard	68.7 Mbit/s \| 816.0 Kbit/s	68.7 Mbit/s \| 80.0 Mbit/s OR 16.0 Mbit/s	100.0% \| 98%	441.5d \| 8d	441.5d \| 61.0d	27.0d \| 12.8d	100.0% \| 98.0%	441.5d \| 1.0d	2026-04-21 18:05:17	65.5 Kbit/s
gabelmoo (DE)	Yes	Yes	No	—	Y	Yes	Yes	Running, Valid, V2Dir, Fast, Stable, HSDir, Guard	68.7 Mbit/s \| 816.0 Kbit/s	68.7 Mbit/s \| 296.0 Mbit/s OR 16.0 Mbit/s	100.0% \| 98%	726.4d \| 8d	726.4d \| 61.1d	27.0d \| 12.8d	100.0% \| 98.0%	726.4d \| 1.0d	2026-04-21 18:05:17	72.0 Kbit/s
longclaw (US)	Yes	Yes	No	—	Y	Yes	—	Running, Valid, V2Dir, Fast, Stable, HSDir, Guard	68.7 Mbit/s \| 816.0 Kbit/s	68.7 Mbit/s \| 240.0 Mbit/s OR 16.0 Mbit/s	100.0% \| 98%	336.4d \| 8d	336.4d \| 63.3d	27.0d \| 12.8d	100.0% \| 98.0%	336.4d \| 1.0d	2026-04-21 18:05:17	80.0 Kbit/s
maatuska (SE)	Yes	Yes	No	—	Y	Yes	Yes	Running, Valid, V2Dir, Fast, Stable, Guard	68.7 Mbit/s \| 816.0 Kbit/s	68.7 Mbit/s \| 312.0 Mbit/s OR 16.0 Mbit/s	99.3% \| 98%	136.4d \| 8d	53.2d \| 19.1d	27.0d \| 12.8d	99.3% \| 98.0%	136.4d \| 1.0d	2026-04-21 18:05:17	104.0 Kbit/s
moria1 (US)	Yes	Yes	No	—	Y	Yes	Yes	Running, Valid, V2Dir, Fast, Stable, HSDir, Guard	68.7 Mbit/s \| 8.4 Mbit/s	68.7 Mbit/s \| 216.0 Mbit/s OR 16.0 Mbit/s	100.0% \| 98%	9.9d \| 8d	548.9d \| 303.0d	27.0d \| 12.8d	100.0% \| 98.0%	9.9d \| 9.8d	2026-04-21 18:05:17	68.0 Kbit/s
tor26 (AT)	Yes	Yes	No	—	Y	Yes	Yes	Running, Valid, V2Dir, Fast, Stable, HSDir, Guard	68.7 Mbit/s \| 816.0 Kbit/s	68.7 Mbit/s \| 288.0 Mbit/s OR 16.0 Mbit/s	100.0% \| 98%	726.4d \| 8d	726.4d \| 62.1d	27.0d \| 12.8d	100.0% \| 98.0%	726.4d \| 1.0d	2026-04-21 18:05:17	79.2 Kbit/s

— = not tested/available • Format: relay value | authority threshold • WFU = Weighted Fractional Uptime • TK = Time Known

Bandwidth Values Explained:
Relay Reported = Your relay's self-reported bandwidth from its descriptor (observed_bandwidth). Used for flag eligibility (Guard, Fast).
Authority Measured = Bandwidth measured by authority's sbws scanner. Used for consensus weight (path selection probability).
Why different? Authorities verify your reported bandwidth independently. 6 of 9 authorities run bandwidth scanners; 3 use relay-reported values directly.

Stable Uptime (Two Data Sources):
Relay Uptime = From Onionoo API (last_restarted field). Self-reported uptime from descriptor. Same value for all authorities.
Authority Threshold = From CollecTor vote files (flag-thresholds stable-uptime). Each authority may have different thresholds.
Why two sources? Vote files contain authority thresholds but not per-relay uptime values. Onionoo aggregates relay descriptors which include uptime.