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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

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 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

5 months 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, 5 months ago

Would this survive reboot? Remember exam needs all changes that survives reboot.

upvoted 2 times

Testo321

1 year 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, 3 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

5 months 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, 8 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, 9 months ago

echo net.ipv4.ip_forward=1 >> /etc/sysctl.conf sysctl -p

upvoted 5 times

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ANI_04

3 years, 1 month ago

echo " net.ipv4.ip_forward = 1" >> /etc/sysctl.conf

upvoted 2 times

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AbidBajwa

3 years, 1 month ago

vi /etc/sysctl.conf net.ipv4.ip_forward = 1

upvoted 3 times

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ionix

3 years, 8 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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