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Exam EX200 topic 1 question 43 discussion

Actual exam question from RedHat's EX200
Question #: 43
Topic #: 1
[All EX200 Questions]

SIMULATION -
Please open the ip_forward, and take effect permanently.

Show Suggested Answer Hide Answer
Suggested Answer: See explanation below.
vim /etc/sysctl.conf net.ipv4.ip_forward = 1
sysctl ג€"w (takes effect immediately)
If no ג€sysctl.confג€ option, use these commands:
sysctl ג€"a |grep net.ipv4
sysctl ג€"P net.ipv4.ip_forward = 1
sysctl -w
by cytron at Nov. 11, 2020, 9:05 a.m.

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cytron
Highly Voted 4 years, 2 months ago
There is no option -P in RHEL8. You need to use the -w option followed by the argument sysctl -w net.ipv4.ip_forward=1 NOTE: No space before or after "=" sign.
upvoted 9 times
gaven186
6 months, 2 weeks ago
you can view the system default line by "sysctl -a | grep ip_forward". "net.ipv4.ip_forward = 0" by system already has 'space' before/after '='. hence it is fine to have 'space'.
upvoted 1 times
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kitkat
2 years, 7 months ago
Would this survive reboot? Remember exam needs all changes that survives reboot.
upvoted 2 times
Testo321
1 year, 2 months ago
No, This will echo net.ipv4.ip_forward=1 >> /etc/sysctl.conf sysctl -p
upvoted 3 times
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sugisho
Highly Voted 3 years, 5 months ago
[root@station ~]# sysctl -a | grep net.ipv4.ip_forward net.ipv4.ip_forward = 0 net.ipv4.ip_forward_update_priority = 1 net.ipv4.ip_forward_use_pmtu = 0 [root@station ~]# sysctl -w net.ipv4.ip_forward=1 net.ipv4.ip_forward = 1 [root@station ~]# sysctl -a | grep net.ipv4.ip_forward net.ipv4.ip_forward = 1 net.ipv4.ip_forward_update_priority = 1 net.ipv4.ip_forward_use_pmtu = 0 [root@station ~]#
upvoted 8 times
gaven186
6 months, 2 weeks ago
sysctl -w command cannot survive a reboot. hence others are suggesting to write a line into sysctl.conf. and followed by sysctl -p
upvoted 2 times
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tinythings
Most Recent 1 year, 9 months ago
echo "net.ipv4.ip_forward = 1" > /etc/sysctl.d/ipforward.conf systemctl reboot
upvoted 2 times
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kenkct
2 years, 10 months ago
echo net.ipv4.ip_forward=1 >> /etc/sysctl.conf sysctl -p
upvoted 5 times
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ANI_04
3 years, 3 months ago
echo " net.ipv4.ip_forward = 1" >> /etc/sysctl.conf
upvoted 2 times
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AbidBajwa
3 years, 3 months ago
vi /etc/sysctl.conf net.ipv4.ip_forward = 1
upvoted 3 times
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ionix
3 years, 9 months ago
# grep ip_forward /etc/sysctl.d/* /etc/sysctl.d/60-gce-network-security.conf:net.ipv4.ip_forward=0 # vi /etc/sysctl.d/60-gce-network-security.conf net.ipv4.ip_forward=0 # sysctl -w net.ipv4.ip_forward=1
upvoted 3 times
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