Finding ID | Version | Rule ID | IA Controls | Severity |
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V-23741 | GEN003601 | SV-45720r1_rule | Medium |
Description |
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To provide some mitigation to TCP Denial of Service attacks, the TCP backlog queue sizes must be set to at least 1280 or in accordance with product-specific guidelines. |
STIG | Date |
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SUSE Linux Enterprise Server v11 for System z | 2016-12-20 |
Check Text ( C-43087r1_chk ) |
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# cat /proc/sys/net/ipv4/tcp_max_syn_backlog If the result is not 1280 or greater, this is a finding. |
Fix Text (F-39118r1_fix) |
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Edit /etc/sysctl.conf and add a setting for "net.ipv4.tcp_max_syn_backlog=1280". Procedure: # echo "net.ipv4.tcp_max_syn_backlog=1280" >> /etc/sysctl.conf # sysctl -p |