What can I do about this?

[Fire-Fox]

This is the first time I see these lines, and the bot is a oper as of today?

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[11:28:43] <OldBoys> [11:28:46] Telnet connection: vibrant.monitoring.internet-measurement.com/60255
[11:28:46] <OldBoys> [11:28:49] TLS: handshake successful. Secure connection established.
[11:28:46] <OldBoys> [11:28:49] TLS: peer did not present a certificate
[11:28:51] <OldBoys> [11:28:54] TIMEOUT ident connection
[11:28:52] <OldBoys> [11:28:55] Lost telnet connection to telnet@vibrant.monitoring.internet-measurement.com/60255
[11:29:05] <OldBoys> [11:29:08] Telnet connection: affectionate.monitoring.internet-measurement.com/58435
[11:29:07] <OldBoys> [11:29:10] TLS: handshake successful. Secure connection established.
[11:29:07] <OldBoys> [11:29:10] TLS: peer did not present a certificate
[11:29:11] <OldBoys> [11:29:14] TIMEOUT ident connection
[11:29:13] <OldBoys> [11:29:16] Lost telnet connection to telnet@affectionate.monitoring.internet-measurement.com/58435
[11:29:26] <OldBoys> [11:29:29] Telnet connection: sparkling.monitoring.internet-measurement.com/39117
[11:29:29] <OldBoys> [11:29:31] TLS: handshake successful. Secure connection established.
[11:29:29] <OldBoys> [11:29:31] TLS: peer did not present a certificate
[11:29:32] <OldBoys> [11:29:34] TIMEOUT ident connection
[11:29:32] <OldBoys> [11:29:34] Refused telnet@sparkling.monitoring.internet-measurement.com (invalid handle: *1)
[11:29:44] <OldBoys> [11:29:47] Telnet connection: dexterous.monitoring.internet-measurement.com/42175
[11:29:47] <OldBoys> [11:29:50] -OldBoys (OldBoys@services.oldboys.pw)- ..::: Hvis du mangler hjælp skriv !h :::..
[11:29:47] <OldBoys> [11:29:50] TLS: handshake successful. Secure connection established.
[11:29:47] <OldBoys> [11:29:50] TLS: peer did not present a certificate
[11:29:52] <OldBoys> [11:29:55] TIMEOUT ident connection
[11:29:53] <OldBoys> [11:29:56] Lost telnet connection to telnet@dexterous.monitoring.internet-measurement.com/42175
[11:29:53] <OldBoys> [11:29:56] Telnet connection: dexterous.monitoring.internet-measurement.com/46379
[11:29:53] <OldBoys> [11:29:56] TLS: handshake successful. Secure connection established.
[11:29:53] <OldBoys> [11:29:56] TLS: peer did not present a certificate
[11:29:56] <OldBoys> [11:29:59] Lost connection while identing [dexterous.monitoring.internet-measurement.com/46379]
[11:30:08] <OldBoys> [11:30:11] Telnet connection: brilliant.monitoring.internet-measurement.com/56757
[11:30:11] <OldBoys> [11:30:14] TLS: handshake successful. Secure connection established.
[11:30:11] <OldBoys> [11:30:14] TLS: peer did not present a certificate
[11:30:14] <OldBoys> [11:30:17] Lost connection while identing [brilliant.monitoring.internet-measurement.com/56757]
[11:30:16] <OldBoys> [11:30:19] Telnet connection: enchanting.monitoring.internet-measurement.com/47237
[11:30:16] <OldBoys> [11:30:19] NET: SSL read failed. Non-SSL connection?
[11:30:16] <OldBoys> [11:30:19] Lost connection while identing [enchanting.monitoring.internet-measurement.com/47237]
[11:30:27] <OldBoys> [11:30:30] Telnet connection: timely.monitoring.internet-measurement.com/41573
[11:30:27] <OldBoys> [11:30:30] NET: SSL read failed. Non-SSL connection?
[11:30:27] <OldBoys> [11:30:30] Lost connection while identing [timely.monitoring.internet-measurement.com/41573]

[/code]

[CrazyCat]

This is a kind of port scanning to check your server:
https://internet-measurement.com/

It is used to discover and measure services that network owners and operators have publicly exposed.

Traffic from this domain is not an attack. Traffic from this domain will never attempt to log in to your systems.

[Fire-Fox]

Ohh thanks

[Carlin0]

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.+ignore *!*@*.internet-measurement.com