Score:2

Ubuntu

Multiple proxy:errors in /var/log/apache2/error.log

Jamie Hutber

4/13/23, 8:02 PM

I am not sure where these warnings are for/concerning. Should I be worried about them or just ignore them as people are trying to connect to my server? Proxy Mod is already enabled, however I am less concerned about this and more the fact my apache instance is showing random ip's and web addresses that are trying to be proxied :?

[Mon Dec 13 19:49:12.127111 2021] [proxy:warn] [pid 992000] [client 162.55.232.112:45408] AH01144: No protocol handler was valid for the URL 192.169.152.51:443 (scheme '192.169.152.51'). If you are using a DSO version of mod_proxy, make sure the proxy submodules are included in the configuration using LoadModule.
[Mon Dec 13 19:49:12.203528 2021] [proxy:warn] [pid 992002] [client 162.55.235.124:49258] AH01144: No protocol handler was valid for the URL 192.169.152.51:443 (scheme '192.169.152.51'). If you are using a DSO version of mod_proxy, make sure the proxy submodules are included in the configuration using LoadModule.
[Mon Dec 13 19:49:12.825123 2021] [proxy:warn] [pid 992004] [client 162.55.232.112:48362] AH01144: No protocol handler was valid for the URL www.mining-cast.com:443 (scheme 'www.mining-cast.com'). If you are using a DSO version of mod_proxy, make sure the proxy submodules are included in the configuration using LoadModule.
[Mon Dec 13 19:49:13.158784 2021] [proxy:warn] [pid 992010] [client 162.55.232.116:39704] AH01144: No protocol handler was valid for the URL sdk.finance:443 (scheme 'sdk.finance'). If you are using a DSO version of mod_proxy, make sure the proxy submodules are included in the configuration using LoadModule.
[Mon Dec 13 19:49:14.867535 2021] [proxy:warn] [pid 992009] [client 176.9.19.26:45758] AH01144: No protocol handler was valid for the URL www.mining-cast.com:443 (scheme 'www.mining-cast.com'). If you are using a DSO version of mod_proxy, make sure the proxy submodules are included in the configuration using LoadModule.
[Mon Dec 13 19:49:14.988339 2021] [proxy:warn] [pid 992003] [client 162.55.235.124:33712] AH01144: No protocol handler was valid for the URL portugiptv.com:443 (scheme 'portugiptv.com'). If you are using a DSO version of mod_proxy, make sure the proxy submodules are included in the configuration using LoadModule.
[Mon Dec 13 19:49:15.730902 2021] [proxy:warn] [pid 992001] [client 162.55.232.116:54246] AH01144: No protocol handler was valid for the URL sdk.finance:443 (scheme 'sdk.finance'). If you are using a DSO version of mod_proxy, make sure the proxy submodules are included in the configuration using LoadModule.
[Mon Dec 13 19:49:17.591263 2021] [proxy:warn] [pid 992000] [client 162.55.232.112:41990] AH01144: No protocol handler was valid for the URL beastiptv.best:443 (scheme 'beastiptv.best'). If you are using a DSO version of mod_proxy, make sure the proxy submodules are included in the configuration using LoadModule.
[Mon Dec 13 19:49:19.224691 2021] [proxy:warn] [pid 992002] [client 176.9.19.26:41162] AH01144: No protocol handler was valid for the URL dossiers-du-rocher.com:443 (scheme 'dossiers-du-rocher.com'). If you are using a DSO version of mod_proxy, make sure the proxy submodules are included in the configuration using LoadModule.
[Mon Dec 13 19:49:20.844906 2021] [ssl:error] [pid 992010] [remote 192.185.52.242:443] AH01961: SSL Proxy requested for localhost.localdomain:80 but not enabled [Hint: SSLProxyEngine]
[Mon Dec 13 19:49:20.844960 2021] [proxy:error] [pid 992010] AH00961: HTTPS: failed to enable ssl support for 192.185.52.242:443 (www.standuptoracism.org.uk)

apache2 mods

root@localhost:~# apache2ctl -M
 proxy_module (shared)
 proxy_balancer_module (shared)
 proxy_http_module (shared)

103

0 + 0

server

proxy

apache2

Bovine

4/21/23, 5:02 AM

Does [this](https://stackoverflow.com/questions/23931987/apache-proxy-no-protocol-handler-was-valid) help?

Jamie Hutber

4/21/23, 1:47 PM

I had actually tried everything on that suggested question. I think though, what is worrying is. I see these warnings directly after a apache restart. But I have zero idea as to what these refer to. They are not my domains/ip's. :/

matigo

4/22/23, 1:52 AM

Silly question, but have you checked your virtual host configuration files to confirm there are no references to the domains or IPs listed? Are you using `mod_proxy` to pass traffic from this web server to a different destination?

Jamie Hutber

4/24/23, 1:43 PM

I think its just good you're asking :D `mod_proxy` is exactly for that. Passing npm through apache. I can confirm that all the `*.conf` files are my own without those ips/domains in them. Weird indeed this is

Nate T

4/27/23, 7:57 AM

Would you mind listing the contents of `/etc/apache2/mods-enabled` ?

Jamie Hutber

4/28/23, 2:53 AM

Added @nate T let me know if that's enough

Nate T

4/28/23, 9:45 AM

Have you tried enabling *mod_proxy_http2*? According to the [docs](https://httpd.apache.org/docs/2.4/mod/mod_proxy.html), *mod_proxy_http* is for http1.1. I've never used that module before, so its just a guess, but the a2 debian docs are pretty trustworthy.

Nate T

4/28/23, 10:00 AM

The wierd ips are likely generated by a require directive in a .conf file. Do you have any packages on your machine that use cgi-bin, like `dwww` or similar? Try using `cat` in a for loop over all *.conf files in `/etc/apache2/conf-enabled`, and grep the result against an ip-like pattern. I bet there will be a few strange ips in the result. (I think `\d{3}\.\d{3}\.\d{3}\.\d{3}` will work, but didnt try it, so you may need to change it up.)

Score:0

Ubuntu

Thomas Aichinger

4/27/23, 4:37 PM

I guess you have enabled proxy module. You need to disable it with

a2dismod proxy

May be there are some other mod's you need to disable. To see what else modules you can (should) disable check output of

apache2ctl -M

0 + 0

Jamie Hutber

4/28/23, 2:05 AM

Thanks Thomas. Sorry but these are already enabled:` proxy_module (shared) proxy_balancer_module (shared) proxy_http_module (shared)` I realised in my hast to create the question I did not highlight the fact I do "care" that proxy mod is enabled/disabled. I'd like to understand _why_ it is asking for proxies to these random places

Score:0

Ubuntu

Thomas Aichinger

4/28/23, 2:05 PM

Ok here how to enable mod_proxy.

a2enmod proxy
a2enmod proxy_http
a2enmod proxy_balancer
a2enmod lbmethod_byrequests
systemctl restart apache2

Apart from your proxy you need to have one (or more) http-servers that deliver the content.

http://10.10.0.100 - Proxy Server

http://192.168.0.11 - Content Server

Edit /etc/apache2/sites-available/000-default.conf and change virtualhost section to

<VirtualHost *:80>
    ProxyPreserveHost On

    ProxyPass / http://192.168.0.11/
    ProxyPassReverse / http://192.168.0.11/
</VirtualHost>

Restart Apache

systemctl restart apache2

Now if you access your proxy server (http://10.10.0.100) in a web browser, you will see the response of your backend server (http://192.168.0.11)

0 + 0

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Multiple proxy:errors in /var/log/apache2/error.log

TH: พร็อกซีหลายรายการ: ข้อผิดพลาดใน /var/log/apache2/error.log

RO: Proxy multiple: erori în /var/log/apache2/error.log

RU: Несколько прокси: ошибки в /var/log/apache2/error.log

VI: Nhiều proxy: lỗi trong /var/log/apache2/error.log

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