Find all positive integers $a,b,c$ satisfying $(a,b)=(b,c)=(c,a)=1$ and \[ \begin{cases} a^2+b\mid b^2+c\\ b^2+c\mid c^2+a \end{cases} \] and none of prime divisors of $a^2+b$ are congruent to $1$ modulo $7$
Given the problem, we need to find all positive integers \(a, b, c\) such that \((a,b) = (b,c) = (c,a) = 1\) and the following conditions hold:
\[
\begin{cases}
a^2 + b \mid b^2 + c \\
b^2 + c \mid c^2 + a
\end{cases}
\]
Additionally, none of the prime divisors of \(a^2 + b\) are congruent to 1 modulo 7.

Let's start by analyzing the given conditions.

1. From the first condition \(a^2 + b \mid b^2 + c\), we can write:
   \[
   b^2 + c = k(a^2 + b) \quad \text{for some integer } k
   \]
   This implies:
   \[
   b^2 + c = ka^2 + kb
   \]
   Rearranging, we get:
   \[
   c = ka^2 + kb - b^2
   \]

2. From the second condition \(b^2 + c \mid c^2 + a\), we can write:
   \[
   c^2 + a = m(b^2 + c) \quad \text{for some integer } m
   \]
   This implies:
   \[
   c^2 + a = mb^2 + mc
   \]
   Rearranging, we get:
   \[
   a = mb^2 + mc - c^2
   \]

Next, we need to consider the condition that none of the prime divisors of \(a^2 + b\) are congruent to 1 modulo 7. Let's denote \(p\) as a prime factor of \(a^2 + b\).

3. We know that:
   \[
   (a^2 + b) \mid (c^2 + a)
   \]
   and
   \[
   (a^2 + b) \mid (b^4 - c^2)
   \]
   Combining these, we get:
   \[
   (a^2 + b) \mid (b^4 + a)
   \]
   and
   \[
   (a^2 + b) \mid (b^8 - a^2)
   \]
   This implies:
   \[
   (a^2 + b) \mid (b^8 - a^2 + a^16 - a^2)
   \]
   Simplifying, we get:
   \[
   (a^2 + b) \mid a^2(a^{14} - 1)
   \]

4. Since \(\gcd(a^2 + b, a^2) = 1\), we have:
   \[
   (a^2 + b) \mid (a^{14} - 1)
   \]

5. Denote \(p\) as a prime factor of \(a^2 + b\). We consider two cases:
   - Case 1: \(p = 7\). By Fermat's Little Theorem, \(a^{14} \equiv a^2 \pmod{7}\). Therefore, \(7 \mid (a^2 - 1)\).
   - Case 2: \(p \neq 7\). If \(p \mid \frac{a^{14} - 1}{a^2 - 1}\), by a well-known lemma, \(p \equiv 0 \text{ or } 1 \pmod{7}\). This contradicts the given condition.

6. Thus, all prime factors \(q \not\equiv 0 \text{ or } 1 \pmod{7}\) of \(a^2 + b\) are also prime factors of \(a^2 - 1\). Hence, we conclude:
   \[
   (a^2 + b) \mid 7(a^2 - 1)
   \]

7. Setting \(7(a^2 - 1) = L(a^2 + b)\), we get:
   \[
   (7 - L)(a^2 + b) = 7(b + 1)
   \]
   Hence, \(L \ge 6\).

8. Trying \(a\) from 1 to 8, we find that \((1, 1, 1)\) and \((6, 13, 370)\) are solutions. However, since \(a, b, c\) are pairwise coprime, \((1, 1, 1)\) is the unique solution.

The final answer is \( \boxed{ (1, 1, 1) } \).