Comments for Tech Junction https://techjunction.co/ Technology Meets Business Thu, 16 Mar 2023 15:05:00 +0000 hourly 1 https://wordpress.org/?v=6.4.4 Comment on Squid Web Proxy Server – Exiting due to repeated, frequent failures by Tech Junction https://techjunction.co/tech-question/squid-web-proxy-server-exiting-due-to-repeated-frequent-failures/answer/2903/#/comment/151 Mon, 27 Feb 2023 16:36:38 +0000 https://techjunction.co/tech-question/squid-web-proxy-server-exiting-due-to-repeated-frequent-failures/answer/2903/#comment-151 To activate the firewall on linuxmint, run these commands as root:
1) To check the status of the firewall:

root@yourserver# ufw status verbose
Status: inactive

2) To enable the firewall (make sure you have console access to your server before activating the fw as you might lose SSH connection):
root@yourserver# ufw enable

3) You can optionally install the GUI to manage the firewall:
root@yourserver# apt-get install gufw
Reading package lists… Done
Building dependency tree… Done
Reading state information… Done
gufw is already the newest version (22.04.0-0ubuntu1).
0 upgraded, 0 newly installed, 0 to remove and 147 not upgraded.

4) Using the GUI, remember to create firewall rules to allow you SSH access to your server from your local network.

]]> Comment on Squid Web Proxy Server – Exiting due to repeated, frequent failures by Tech Junction https://techjunction.co/tech-question/squid-web-proxy-server-exiting-due-to-repeated-frequent-failures/answer/2903/#/comment/150 Mon, 27 Feb 2023 16:26:18 +0000 https://techjunction.co/tech-question/squid-web-proxy-server-exiting-due-to-repeated-frequent-failures/answer/2903/#comment-150 Based on your log messages (“TCP: request_sock_TCP: Possible SYN flooding on port 3128”), it’s obvious that the Squid Web Proxy is under constant DDoS attack. Squid proxy by default runs on port 3128 and it’s clear that the port is being bombarded by “TCP SYN Flood”

“SYN floods” are a form of DDoS attack that attempts to flood a system with requests in order to consume resources and ultimately disable it.
You can prevent SYN flood attacks by installing a firewall on your server.

]]> Comment on Squid Web Proxy Server – Exiting due to repeated, frequent failures by ip_in_mydna https://techjunction.co/tech-question/squid-web-proxy-server-exiting-due-to-repeated-frequent-failures/answer/2903/#/comment/149 Mon, 27 Feb 2023 16:11:51 +0000 https://techjunction.co/tech-question/squid-web-proxy-server-exiting-due-to-repeated-frequent-failures/answer/2903/#comment-149 Hi Tech Junction, thanks for the quick response, please find below the requested log messages:

[3015458.845878] squid[671764]: segfault at 7fe3e567fcf0 ip 00007fe4e5509fbd sp 00007ffc8fde8290 error 4 in libc.so.6[7fe4e548e000+195000]
[3015458.845891] Code: 8b 4a 08 48 83 f9 0f 0f 86 c0 01 00 00 48 39 ce 0f 82 b7 01 00 00 49 8b 32 48 83 e6 f8 48 39 c6 0f 85 37 04 00 00 48 8b 72 18 39 56 10 0f 85 89 03 00 00 4c 39 5a 10 0f 85 7f 03 00 00 f6 c1
[3015740.781355] TCP: request_sock_TCP: Possible SYN flooding on port 3128. Sending cookies. Check SNMP counters.
[3015919.266747] TCP: request_sock_TCP: Possible SYN flooding on port 3128. Sending cookies. Check SNMP counters.
[3016511.125031] TCP: request_sock_TCP: Possible SYN flooding on port 3128. Sending cookies. Check SNMP counters.
[3016783.892781] squid[671997]: segfault at 55922f8ccd ip 000055922dd110d7 sp 00007ffca0b34020 error 4 in squid[55922db41000+47b000]
[3016783.892794] Code: 83 ec 18 64 48 8b 04 25 28 00 00 00 48 89 44 24 08 31 c0 4c 8d 64 24 07 e8 26 30 e3 ff 4c 8b 6b 18 4d 85 ed 0f 84 aa 00 00 00 8b 55 78 4c 8d 64 24 07 85 d2 78 3b 4c 8d 64 24 07 ba 01 00 00
[3016837.119459] TCP: request_sock_TCP: Possible SYN flooding on port 3128. Sending cookies. Check SNMP counters.
[3017118.081446] TCP: request_sock_TCP: Possible SYN flooding on port 3128. Sending cookies. Check SNMP counters.
[3017278.438091] TCP: request_sock_TCP: Possible SYN flooding on port 3128. Sending cookies. Check SNMP counters.
[3017289.165494] TCP: request_sock_TCP: Possible SYN flooding on port 3128. Sending cookies. Check SNMP counters.
[3017423.506746] TCP: request_sock_TCP: Possible SYN flooding on port 3128. Sending cookies. Check SNMP counters.
[3018694.490819] TCP: request_sock_TCP: Possible SYN flooding on port 3128. Sending cookies. Check SNMP counters.
[3019214.751951] TCP: request_sock_TCP: Possible SYN flooding on port 3128. Sending cookies. Check SNMP counters.
[3019288.381624] squid[672457]: segfault at 5577ae7b ip 00005577abfe10d7 sp 00007fff6a0f36f0 error 4 in squid[5577abe11000+47b000]
[3019288.381636] Code: 83 ec 18 64 48 8b 04 25 28 00 00 00 48 89 44 24 08 31 c0 4c 8d 64 24 07 e8 26 30 e3 ff 4c 8b 6b 18 4d 85 ed 0f 84 aa 00 00 00 8b 55 78 4c 8d 64 24 07 85 d2 78 3b 4c 8d 64 24 07 ba 01 00 00
[3019288.386368] TCP: request_sock_TCP: Possible SYN flooding on port 3128. Sending cookies. Check SNMP counters.
[3019306.909344] TCP: request_sock_TCP: Possible SYN flooding on port 3128. Sending cookies. Check SNMP counters.

]]> Comment on Free CV Template for Telecom and ICT Professionals by jnmakuru https://techjunction.co/download/free-cv-template-for-telecom-and-ict-professionals/#comment-5 Wed, 02 Feb 2022 14:12:38 +0000 https://techjunction.co/?post_type=wpdmpro&p=1073#comment-5 In reply to Kelvin.

Hi Kelvin, thanks for your feedback, To download this file, click on the blue link that has “CLICK HERE TO DOWNLOAD THIS DOCUMENT”
Hope this helps. Cheers

]]> Comment on Free CV Template for Telecom and ICT Professionals by Kelvin https://techjunction.co/download/free-cv-template-for-telecom-and-ict-professionals/#comment-4 Wed, 02 Feb 2022 14:00:58 +0000 https://techjunction.co/?post_type=wpdmpro&p=1073#comment-4 Still unable to download. Kindly share the template to my email. I will appreciate

]]> Comment on Free CV Template for Telecom and ICT Professionals by jnmakuru https://techjunction.co/download/free-cv-template-for-telecom-and-ict-professionals/#comment-3 Wed, 02 Feb 2022 10:50:17 +0000 https://techjunction.co/?post_type=wpdmpro&p=1073#comment-3 In reply to Kelvin.

Hi Kelvin, the download link has been added. Thank you for your question.

]]> Comment on Free CV Template for Telecom and ICT Professionals by Kelvin https://techjunction.co/download/free-cv-template-for-telecom-and-ict-professionals/#comment-2 Wed, 02 Feb 2022 10:29:51 +0000 https://techjunction.co/?post_type=wpdmpro&p=1073#comment-2 How to download the template?

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