November 2023 - Xymon - Xymon mailman web

How capable is the `expect` & `send` in protocols.conf?
by cleaver＠terabithia.org 07 Nov '23

07 Nov '23

On Sun, November 5, 2023 19:40, Grant Taylor wrote: > Hi, > > How capable is the `expect` and `send` in protocols.conf? > > I'm wondering if I can have multiple instances of `expect` and / or > `send` for the same protocol definition. > > My current use case is for monitoring of an SMTP server that's using > multi-line SMTP greetings. > > 220-first line > 220 second line > > I want to use the following in protocols.conf but I'm not sure if it > will work as desired or not. > > expect "220-" > expect "220 " > send "QUIT" > > I'd like Xymon to send "QUIT" /after/ it receives the "220 " line (with > space). Grant, Unfortunately, xymonnet does not implement the full expect framework. Based on a re-examination of xymonnet.c and contest.c, I believe we're just sending the 'send' buffer once, and then collecting whatever is available in response. The actual comparison (to the "expect" line) looks to be done later on, when we're deciding colors and creating the status message results. IIRC, the lack of delay in waiting for results has caused problems in some tests before... possibly specifically with SMTP, actually. (HTTP requests aren't handled the same way, and will always return the full payload back if configured to retrieve the results.) -jc

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How capable is the `expect` & `send` in protocols.conf?
by gtaylor＠tnetconsulting.net 06 Nov '23

06 Nov '23

Hi, How capable is the `expect` and `send` in protocols.conf? I'm wondering if I can have multiple instances of `expect` and / or `send` for the same protocol definition. My current use case is for monitoring of an SMTP server that's using multi-line SMTP greetings. 220-first line 220 second line I want to use the following in protocols.conf but I'm not sure if it will work as desired or not. expect "220-" expect "220 " send "QUIT" I'd like Xymon to send "QUIT" /after/ it receives the "220 " line (with space). -- Grant. . . . unix || die

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Acknowledge alert for intermittent failure
by lolo＠troll.free.org 05 Nov '23

05 Nov '23

Hi, When acknowledging an alert for a specified delay , the acknowledge is cancelled when the service come back before the specified delay. If this is an intermittent failure (due to weather for example ) , we get a new alert before the specified delay and have to ack it again and again each time. How to make the ack valid for the specified delay even if the service come back before ? Regards, -- Laurent Frigault | Free.org - BookMyName.com - ONLINE SAS - Registar ID 74

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Missing support for HTTP/2 ?
by abe＠deuxchevaux.org 01 Nov '23

01 Nov '23

Hi, On Wed, Nov 01, 2023 at 02:21:04PM +0100, Ingeborg Hellemo via Xymon wrote: > I have a webserver which works ok when you visit it in a browser or when you > use curl, but Xymon http test shows "SSL error". Tests with "openssl s_client" > from the command line works as expected. > > Could the culprit be that xymonnet does not support HTTP/2 ? I don't think so. It's probably more an issue of incompatible ciphers or so. Or is that an HTTP/2-only server? So far I'm also not aware of any HTTP/2 only (production) web server. Maybe this will come in the future. But yeah, as far as I know, xymonnet does not support HTTP/2 ? nor HTTP/3. Then again, it might be possible to implement a minimal client via protocols.cfg hex syntax like with e.g. ajp13 or rdp. But if the handshake needs anything outside the standard TLS handshake (and I'm not that versed in HTTP/2), it will not work. And indeed, builtin xymonnet support for HTTP/2 and HTTP/3 would be nice, especially if you could monitor the availability of protocol versions separately (like for HTTPS and HTTP). But I suspect this would need an 3rd party library like curl or nghttp2 to be used. Kind regards, Axel -- PGP: 2FF9CD59612616B5 /~\ Plain Text Ribbon Campaign, http://arc.pasp.de/ Mail: abe at deuxchevaux.org \ / Say No to HTML in E-Mail and Usenet Mail+Jabber: abe at noone.org X https://axel.beckert.ch/ / \ I love long mails: https://email.is-not-s.ms/

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Missing support for HTTP/2 ?
by ingeborg.hellemo＠uit.no 01 Nov '23

01 Nov '23

I have a webserver which works ok when you visit it in a browser or when you use curl, but Xymon http test shows "SSL error". Tests with "openssl s_client" from the command line works as expected. Could the culprit be that xymonnet does not support HTTP/2 ? /#curl --head https://<servername>/ HTTP/2 200 cache-control: private content-length: 4423 content-type: text/html strict-transport-security: max-age=31536000 date: Wed, 01 Nov 2023 13:15:44 GMT --Ingeborg -- Ingeborg ?strem Hellemo -- ingeborg.hellemo at uit.no Dep. of Information Technology --- Univ. of Troms?

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